def finalize(self):
""" Merges together any nonzero sections which span multiple segments.
Whether there are gaps in between does not matter.
Returns
-------
sections : TimeFrameGroup (a subclass of Python's list class)
"""
# Merge the results of all chunks
starts = []
ends = []
for index, row in self._data.iterrows():
starts.append(row['sections']['start'])
ends.append(row['sections']['end'])
if len(starts) == 0 == len(ends):
self._data = TimeFrameGroup()
return
starts = pd.concat(starts)
ends = pd.concat(ends)
rate = pd.Timedelta(seconds=self.max_sample_rate)
self._data = TimeFrameGroup(starts_and_ends={
'starts': starts,
'ends': ends
}) #.merge_shorter_gaps_than(rate) TODO: Merge needed?
def import_from_cache(self, cached_stat, sections):
''' Stores the statistic into the cache of the nilmtk.DataStore
Note
----
I do not know whether this is still an issue:
HIER IST DAS PROBLEM BEIM STATISTIKEN LESEN!
DIE WERDEN CHUNK Weise GESPEICHERT, aber hier wird auf
das Vorhandensein der gesamten Section als ganzes vertraut.
'''
self._data = TimeFrameGroup(cached_stat)
def finalize(self):
"""Merges together any good sections which span multiple segments,
as long as those segments are adjacent
(previous.end - max_sample_period <= next.start <= previous.end).
This may happen if we merge cached sections and noncached sections.
Returns
-------
sections : TimeFrameGroup (a subclass of Python's list class)
"""
sections = TimeFrameGroup()
end_date_of_prev_row = None
for index, row in self._data.iterrows():
row_sections = row['sections']
# Check if first TimeFrame of row_sections needs to be merged with
# last TimeFrame of previous section
if (end_date_of_prev_row is not None):
rows_are_adjacent = (
(end_date_of_prev_row - self.max_sample_period_td) <= index
<= end_date_of_prev_row)
if rows_are_adjacent and row_sections[0].start is None:
assert sections[-1].end is None
sections._df.iloc[-1, 1] = row_sections[
0].end # HIER MUSSTE ICH AUFPASSEN, DASS ICH UEBERSCHREIBE!
row_sections.pop(0)
else:
# row_sections[0] and sections[-1] were not in adjacent chunks
# so check if they are both open-ended and close them...
if sections and sections[-1].end is None:
try:
sections[-1].end = end_date_of_prev_row
except ValueError: # end_date_of_prev_row before sections[-1].start
pass
if row_sections and row_sections[0].start is None:
try:
row_sections[0].start = index
except ValueError:
pass
end_date_of_prev_row = row['end']
sections.extend(row_sections)
if sections and sections.count() > 0:
sections[-1].include_end = True
if sections[-1].end is None:
sections[
-1,
1] = end_date_of_prev_row # HIER MUSSTE ICH AUFPASSEN, DASS ICH UEBERSCHREIBE!
sections._df.reset_index(drop=True, inplace=True)
self._data = sections
def combined(self):
"""Merges together any good sections which span multiple segments,
as long as those segments are adjacent
(previous.end - max_sample_period <= next.start <= previous.end).
Returns
-------
sections : TimeFrameGroup (a subclass of Python's list class)
"""
sections = TimeFrameGroup()
end_date_of_prev_row = None
for index, row in self._data.iterrows():
row_sections = row['sections']
# Check if first TimeFrame of row_sections needs to be merged with
# last TimeFrame of previous section
if (end_date_of_prev_row is not None):
rows_are_adjacent = (
(end_date_of_prev_row - self.max_sample_period_td)
<= index <=
end_date_of_prev_row)
if rows_are_adjacent and row_sections[0].start is None:
assert sections[-1].end is None
sections[-1].end = row_sections[0].end
row_sections.pop(0)
else:
# row_sections[0] and sections[-1] were not in adjacent chunks
# so check if they are both open-ended and close them...
if sections and sections[-1].end is None:
try:
sections[-1].end = end_date_of_prev_row
except ValueError: # end_date_of_prev_row before sections[-1].start
pass
if row_sections and row_sections[0].start is None:
try:
row_sections[0].start = index
except ValueError:
pass
end_date_of_prev_row = row['end']
sections.extend(row_sections)
if sections:
sections[-1].include_end = True
if sections[-1].end is None:
sections[-1].end = end_date_of_prev_row
return sections
def combined(self):
"""Merges together any good sections which span multiple segments,
as long as those segments are adjacent
(previous.end - max_sample_period <= next.start <= previous.end).
Returns
-------
sections : TimeFrameGroup (a subclass of Python's list class)
"""
sections = TimeFrameGroup()
end_date_of_prev_row = None
for index, row in self._data.iterrows():
row_sections = row['sections']
# Check if first TimeFrame of row_sections needs to be merged with
# last TimeFrame of previous section
if (end_date_of_prev_row is not None):
rows_are_adjacent = (
(end_date_of_prev_row - self.max_sample_period_td) <= index
<= end_date_of_prev_row)
if rows_are_adjacent and row_sections[0].start is None:
assert sections[-1].end is None
sections[-1].end = row_sections[0].end
row_sections.pop(0)
else:
# row_sections[0] and sections[-1] were not in adjacent chunks
# so check if they are both open-ended and close them...
if sections and sections[-1].end is None:
try:
sections[-1].end = end_date_of_prev_row
except ValueError: # end_date_of_prev_row before sections[-1].start
pass
if row_sections and row_sections[0].start is None:
try:
row_sections[0].start = index
except ValueError:
pass
end_date_of_prev_row = row['end']
sections.extend(row_sections)
if sections:
sections[-1].include_end = True
if sections[-1].end is None:
sections[-1].end = end_date_of_prev_row
return sections
def load(self, key, columns=None, sections=None, n_look_ahead_rows=0,
chunksize=MAX_MEM_ALLOWANCE_IN_BYTES):
file_path = self._key_to_abs_path(key)
# Set `sections` variable
sections = [TimeFrame()] if sections is None else sections
sections = TimeFrameGroup(sections)
self.all_sections_smaller_than_chunksize = True
# iterate through parameter sections
# requires 1 pass through file for each section
for section in sections:
window_intersect = self.window.intersection(section)
header_rows = [0,1]
text_file_reader = pd.read_csv(file_path,
index_col=0,
header=header_rows,
parse_dates=True,
chunksize=chunksize)
# iterate through all chunks in file
for chunk_idx, chunk in enumerate(text_file_reader):
# filter dataframe by specified columns
if columns:
chunk = chunk[columns]
# mask chunk by window and section intersect
subchunk_idx = [True]*len(chunk)
if window_intersect.start:
subchunk_idx = np.logical_and(subchunk_idx, (chunk.index>=window_intersect.start))
if window_intersect.end:
subchunk_idx = np.logical_and(subchunk_idx, (chunk.index<window_intersect.end))
if window_intersect.empty:
subchunk_idx = [False]*len(chunk)
subchunk = chunk[subchunk_idx]
if len(subchunk)>0:
subchunk_end = np.max(np.nonzero(subchunk_idx))
subchunk.timeframe = TimeFrame(subchunk.index[0], subchunk.index[-1])
# Load look ahead if necessary
if n_look_ahead_rows > 0:
if len(subchunk.index) > 0:
rows_to_skip = (len(header_rows)+1)+(chunk_idx*chunksize)+subchunk_end+1
try:
subchunk.look_ahead = pd.read_csv(file_path,
index_col=0,
header=None,
parse_dates=True,
skiprows=rows_to_skip,
nrows=n_look_ahead_rows)
except ValueError:
subchunk.look_ahead = pd.DataFrame()
else:
subchunk.look_ahead = pd.DataFrame()
yield subchunk
def _find_sections_with_no_target(self):
"""Finds the intersections of the mains good sections with the gaps
between target appliance activations.
"""
self.sections_with_no_target = {}
seq_length_secs = self.seq_length * self.sample_period
for fold, sects_per_building in self.mains_good_sections.items():
for building, good_sections in sects_per_building.items():
activations = (
self.activations[fold][self.target_appliance][building])
mains = self.mains[fold][building]
mains_good_sections = self.mains_good_sections[fold][building]
gaps_between_activations = TimeFrameGroup()
prev_end = mains.index[0]
for activation in activations:
gap = TimeFrame(prev_end, activation.index[0])
gaps_between_activations.append(gap)
prev_end = activation.index[-1]
gap = TimeFrame(prev_end, mains.index[-1])
gaps_between_activations.append(gap)
intersection = (
gaps_between_activations.intersection(mains_good_sections))
intersection = intersection.remove_shorter_than(
seq_length_secs)
self.sections_with_no_target.setdefault(
fold, {})[building] = (intersection)
logger.info(
"Found {} sections without target for {} {}.".format(
len(intersection), fold, building))
def _find_sections_with_no_target(self):
"""Finds the intersections of the mains good sections with the gaps
between target appliance activations.
"""
self.sections_with_no_target = {}
seq_length_secs = self.seq_length * self.sample_period
for fold, sects_per_building in self.data_good_sections.items():
for building, good_sections in sects_per_building.items():
if building not in self.all_activations[fold][self.target_appliance]:
continue
activations = (
self.all_activations[fold][self.target_appliance][building])
data = self.data[fold][building]
data_good_sections = good_sections
gaps_between_activations = TimeFrameGroup()
prev_end = data.index[0]
for activation in activations:
activation_start = activation.start
if prev_end < activation_start:
gap = TimeFrame(prev_end, activation_start)
gaps_between_activations.append(gap)
prev_end = activation.end
data_end = data.index[-1]
if prev_end < data_end:
gap = TimeFrame(prev_end, data_end)
gaps_between_activations.append(gap)
intersection = (
gaps_between_activations.intersection(data_good_sections))
intersection = intersection.remove_shorter_than(
seq_length_secs)
self.sections_with_no_target.setdefault(fold, {})[building] = (
intersection)
logger.info("Found {} sections without target for {} {}."
.format(len(intersection), fold, building))
def append(self, timeframe, new_results):
"""Append a single result.
Parameters
----------
timeframe : nilmtk.TimeFrame
new_results : {'sections': list of TimeFrame objects}
"""
new_results['sections'] = [TimeFrameGroup(new_results['sections'][0])]
super(AboveFreqSectionsResults, self).append(timeframe, new_results)
def _delete_phony_sections(self):
filtered_data = {}
for fold, data_per_building in self.data.items():
for building, data in data_per_building.items():
if building not in self.phony_active_timeframes[fold][self.target_appliance]:
continue
activations = (
self.phony_active_timeframes[fold][self.target_appliance][building])
data_between_phony_activations = TimeFrameGroup()
prev_end = data.index[0]
for activation in activations:
activation_start = activation.start
if prev_end < activation_start:
gap = TimeFrame(prev_end, activation_start)
data_between_phony_activations.append(gap)
prev_end = activation.end
data_end = data.index[-1] + pd.Timedelta(seconds=self.sample_period)
if prev_end < data_end:
gap = TimeFrame(prev_end, data_end)
data_between_phony_activations.append(gap)
dfs = []
for section in data_between_phony_activations:
dfs.append(section.slice(data))
data = pd.concat(dfs)
filtered_data.setdefault(fold, {})[building] = (
data)
logger.info("Found {} good sections for {} {}."
.format(len(data_between_phony_activations), fold, building))
self.data = filtered_data
def _find_sections_with_no_target(self):
"""Finds the intersections of the mains good sections with the gaps
between target appliance activations.
"""
self.sections_with_no_target = {}
seq_length_secs = self.seq_length * self.sample_period
for fold, sects_per_building in self.mains_good_sections.iteritems():
for building, good_sections in sects_per_building.iteritems():
activations = (
self.activations[fold][self.target_appliance][building])
mains = self.mains[fold][building]
mains_good_sections = self.mains_good_sections[fold][building]
gaps_between_activations = TimeFrameGroup()
prev_end = mains.index[0]
for activation in activations:
gap = TimeFrame(prev_end, activation.index[0])
gaps_between_activations.append(gap)
prev_end = activation.index[-1]
gap = TimeFrame(prev_end, mains.index[-1])
gaps_between_activations.append(gap)
intersection = (
gaps_between_activations.intersection(mains_good_sections))
intersection = intersection.remove_shorter_than(
seq_length_secs)
self.sections_with_no_target.setdefault(fold, {})[building] = (
intersection)
logger.info("Found {} sections without target for {} {}."
.format(len(intersection), fold, building))
def _load_mains_into_memory(self):
logger.info("Loading NILMTK mains...")
# Load dataset
#dataset = nilmtk.DataSet(self.filename)
self.mains = {}
self.mains_good_sections = {}
for fold, buildings_and_windows in self.windows.items():
for building_i, window in buildings_and_windows.items():
dataset=load_mains_dataset(int(building_i))
dataset=set_window(dataset, window[0], window[1])
#elec = dataset.buildings[building_i].elec
building_name = (
'REDD' +
'_building_{}'.format(building_i))
logger.info(
"Loading mains for {}...".format(building_name))
#mains_meter = elec.mains()
good_sections_interval = find_good_sections(dataset,30)
good_sections_interval = TimeFrameGroup(good_sections_interval)
#meter = dataset
resample_kwargs={}
resample_kwargs['rule'] = '{:d}S'.format(self.sample_period)
dataset=dataset['power']['apparent']
dataset=safe_resample(dataset,resample_kwargs)
dataset=dataset.agg(np.mean)
dataset=dataset.interpolate()
mains_data = power_series_all_data(dataset, good_sections_interval).dropna()
print(mains_data.index[0])
print(fold)
print(building_i)
def set_mains_data(dictionary, data):
dictionary.setdefault(fold, {})[building_name] = data
if not mains_data.empty:
set_mains_data(self.mains, mains_data)
set_mains_data(self.mains_good_sections, good_sections_interval)
logger.info(
"Loaded mains data from building {} for fold {}"
" from {} to {}."
.format(building_name, fold,
mains_data.index[0], mains_data.index[-1]))
#dataset.store.close()
logger.info("Done loading NILMTK mains data.")
def __init__(self, **config):
if 'filename' not in config.keys():
self.dataSet = nilmtk.DataSet("ukdale.h5")
else:
self.dataSet = nilmtk.DataSet(config['fileName'])
if 'startTime' not in config.keys() or 'endTime' not in config.keys():
self.dataSet.set_window("2012-11-01", "2015-01-31")
else:
self.dataSet.set_window(config['startTime'], config['endTime'])
if 'trainBuildings' not in config.keys():
self.trainBuildings = [1, 3, 4, 5]
else:
self.trainBuildings = config['trainBuildings']
if 'testBuildings' not in config.keys():
self.testBuildings = [2]
else:
self.testBuildings = config['testBuildings']
if 'applications' not in config.keys():
raise KeyError("please input applications")
self.applications = config['applications']
if 'targetapplication' not in config.keys():
raise KeyError("please input targetapplication")
self.targetApplication = config['targetapplication']
if 'randSeed' not in config.keys():
randSeed = 0
else:
randSeed = config['randSeed']
self.otherApplications = [
i for i in self.applications if i not in [self.targetApplication]
]
self.allBuildings = set(self.trainBuildings + self.testBuildings)
self.window = 599
self.inputSeqs = []
self.targetSeqs = []
self.rng = np.random.RandomState(randSeed)
activationConfig = {
'fridge': {
'min_off_duration': 18, # 12 in paper here
'min_on_duration': 60,
'on_power_threshold': 50,
'sample_period': 6,
},
'kettle': {
'min_off_duration': 18, # 0 in paper here
'min_on_duration': 12,
'on_power_threshold': 2000,
'sample_period': 6,
},
'washing machine': {
'min_off_duration': 160,
'min_on_duration': 1800,
'on_power_threshold': 20,
'sample_period': 6,
},
'microwave': {
'min_off_duration': 30,
'min_on_duration': 12,
'on_power_threshold': 200,
'sample_period': 6,
},
'dish washer': {
'min_off_duration': 1800,
'min_on_duration': 1800,
'on_power_threshold': 10,
'sample_period': 6,
}
}
self.elecMains = {}
self.goodSections = {}
for building in self.allBuildings:
self.goodSections[building] = self.dataSet.buildings[
building].elec.mains().good_sections()
self.elecMains[building] = self.dataSet.buildings[
building].elec.mains().power_series_all_data(
sample_period=6,
sections=self.goodSections[building]).dropna()
self.numApp = {}
self.elecApp = {}
self.activationsApp = {}
self.activationAppSections = {}
for app in self.applications:
self.elecApp[app] = {}
self.activationsApp[app] = {}
self.numApp[app] = 0
self.activationAppSections[app] = {}
for building in self.allBuildings:
try:
self.elecApp[app][building] = self.dataSet.buildings[
building].elec[app].power_series_all_data(
sample_period=6).dropna()
self.activationsApp[app][
building] = self.dataSet.buildings[building].elec[
app].get_activations(**activationConfig[app])
self.activationsApp[app][building] = [
activation.astype(np.float32)
for activation in self.activationsApp[app][building]
]
self.numApp[app] += len(self.activationsApp[app][building])
self.activationAppSections[app][building] = TimeFrameGroup(
)
for activation in self.activationsApp[app][building]:
self.activationAppSections[app][building].append(
TimeFrame(activation.index[0],
activation.index[-1]))
except KeyError as exception:
logger.info(
str(building) + " has no " + app +
". Full exception: {}".format(exception))
continue
logger.info("Done loading NILMTK data.")
for building in self.allBuildings:
activationsToRemove = []
try:
activations = self.activationsApp[
self.targetApplication][building]
mains = self.elecMains[building]
for i, activation in enumerate(activations):
activationDuration = (activation.index[-1] -
activation.index[0])
start = (activation.index[0] - activationDuration)
end = (activation.index[-1] + activationDuration)
if start < mains.index[0] or end > mains.index[-1]:
activationsToRemove.append(i)
else:
mainsForAct = mains[start:end]
if not self._hasSufficientSamples(
start, end, mainsForAct):
activationsToRemove.append(i)
activationsToRemove.reverse()
for i in activationsToRemove:
activations.pop(i)
self.activationsApp[
self.targetApplication][building] = activations
except KeyError as exception:
continue
self.sectionsWithNoTarget = {}
for building in self.allBuildings:
try:
activationsTarget = self.activationsApp[
self.targetApplication][building]
mainGoodSections = self.goodSections[building]
mains = self.elecMains[building]
gapsBetweenActivations = TimeFrameGroup()
prev = mains.index[0]
for activation in activationsTarget:
try:
p2 = prev
gapsBetweenActivations.append(
TimeFrame(prev, activation.index[0]))
prev = activation.index[-1]
p1 = activation.index[0]
except ValueError:
logger.debug("----------------------")
logger.debug(p1)
logger.debug(p2)
logger.debug(activation.index[0])
logger.debug(activation.index[-1])
gapsBetweenActivations.append(TimeFrame(prev, mains.index[-1]))
intersection = gapsBetweenActivations.intersection(
mainGoodSections)
intersection = intersection.remove_shorter_than(6 *
self.window)
self.sectionsWithNoTarget[building] = intersection
except KeyError:
continue
def _get_stat_from_cache_or_compute(self, nodes, results_obj,
loader_kwargs):
"""General function for computing statistics and/or loading them from
cache.
Cached statistics lives in the DataStore at
'building<I>/elec/cache/meter<K>/<statistic_name>' e.g.
'building1/elec/cache/meter1/total_energy'. We store the
'full' statistic... i.e we store a representation of the `Results._data`
DataFrame. Some times we need to do some conversion to store
`Results._data` on disk. The logic for doing this conversion lives
in the `Results` class or subclass. The cache can be cleared by calling
`ElecMeter.clear_cache()`.
When 'preprocessing' is set, then the cache is not used because the cache
is only valid for the version without preprocessing.
Parameters
----------
nodes : list of nilmtk.Node classes
results_obj : instance of nilmtk.Results subclass. This is THE result
instance which is afterwards filled by all the results
coming from the different chunks.
loader_kwargs : dict
Returns
-------
if `full_results` is True then return nilmtk.Results subclass
instance otherwise return nilmtk.Results.simple().
See Also
--------
clear_cache
_compute_stat
key_for_cached_stat
get_cached_stat
"""
full_results = loader_kwargs.pop('full_results', False)
verbose = loader_kwargs.get('verbose')
if 'ac_type' in loader_kwargs or 'physical_quantity' in loader_kwargs:
loader_kwargs = self._convert_physical_quantity_and_ac_type_to_cols(
**loader_kwargs)
columns = loader_kwargs.get('columns', [])
ac_types = set([m[1] for m in columns if m[1]])
results_obj_copy = deepcopy(results_obj)
# Prepare `sections` list
sections = loader_kwargs.get('sections')
if sections is None:
tf = self.get_timeframe()
tf.include_end = True
sections = [tf]
sections = TimeFrameGroup(sections) # Takes care that NILMTK timeframe
sections = [s for s in sections if not s.empty]
# Retrieve usable stats from cache
key_for_cached_stat = self.key_for_cached_stat(results_obj.name)
cached_stat = None
if loader_kwargs.get('preprocessing') is None:
cached_stat = self.get_cached_stat(key_for_cached_stat)
#results_obj.import_from_cache(cached_stat, sections) # Fill results_obj with cache
#def find_sections_to_compute():
# # Get sections_to_compute
# results_obj_timeframes = results_obj.timeframes()
# sections_to_compute = set(sections) - set(results_obj_timeframes)
# t1 = TimeFrameGroup(sections)
# t2 = TimeFrameGroup(results_obj_timeframes)
# sections_to_compute = t1.diff(t2) # HIER IST DAS DIFF, DAS ICH NEU GEBAUT HABE!!! NUR WARUM GEHT ES GERADE NICHT MEHR???
# sections_to_compute = sorted(sections_to_compute)
# return sections_to_compute
#try:
# ac_type_keys = results_obj.keys() #.simple().keys()
#except:
# sections_to_compute = find_sections_to_compute()
#else:
# if ac_types.issubset(ac_type_keys):
# # IF ac_type in cache, only calculate remaining sections
# sections_to_compute = find_sections_to_compute()
# else:
# # If false ac_type cached, still have to compute all
# sections_to_compute = sections
# results_obj = results_obj_copy
#else:
# sections_to_compute = sections
if verbose and not cached_stat is None: #._data.empty:
print("Using cached result.")
# If necessary compute stats for missing sections
if cached_stat is None: #sections_to_compute:
# If we need everything either way, we don't need expensive index lookup during load
#if not self.get_timeframe() in sections_to_compute:
# loader_kwargs['sections'] = sections_to_compute
#computed_result = self._compute_stat(nodes, loader_kwargs)
# Merge newly computed stats into the main stat result
# DAS HIER BAUT MAN BESSER DIREKT IN DEN NODE EIN!!! DASS SEIN RESULT ERWEITERT WIRD
# DANN KANN MAN IMMER NOCH DAS RESULT VOM CACHING NEHMEN UND VERBINDEN!
# MAN SETZT DANN VON ALLEN NODE ELEMENTEN DAS RESULT MIT IN DIE PIPELINE ELEMENTE!
# DANN KANN MAN SIE HINTEN RAUSHOLEN. SO KANN MAN DIE BERECHNUNG IN EINEM ZUG MACHEN.
# => Ist ja so gemacht. Nur eben fuer jede Section!
# => Die einzige rweiterung waere das durchreichen von Results.
#results_obj.update(computed_result.results)
results_obj = self._compute_stat(nodes, loader_kwargs).results
# For Nonzero section exclude where there are not good sections
if results_obj.name == 'nonzero_sections' or results_obj.name == 'overbasepower_sections':
good_sections = self.good_sections(**loader_kwargs) #_data
results_obj._data = results_obj._data.intersection(
good_sections)
# Save to disk newly computed stats
stat_for_store = results_obj.export_to_cache()
try:
#self.store.remove(key_for_cached_stat)
self.store.put(key_for_cached_stat, stat_for_store, fixed=True)
# Temporary workarround to store the good sections also for the other meters TODO
if results_obj.name == 'good_sections':
for i in range(2, 4):
self.store.put(key_for_cached_stat.replace(
'meter1', 'meter' + str(i)),
stat_for_store,
fixed=True)
except ValueError:
# the old table probably had different columns
self.store.remove(key_for_cached_stat)
self.store.put(key_for_cached_stat,
results_obj.export_to_cache())
else:
results_obj.import_from_cache(
cached_stat, sections) # Fill results_obj with cache
# Return the correct value depending on options
if full_results:
return results_obj
res = results_obj #.simple()
if ac_types:
try:
ac_type_keys = res.keys()
except:
return res
else:
if res.empty:
return res
else:
return pd.Series(res[ac_types], index=ac_types)
return res._data
class OverBasepowerSectionsResults(Results):
""" The result of the Non zero section statistic.
Attributes
----------
_data : pd.DataFrame
index is start date for the whole chunk
`end` is end date for the whole chunk
`sections` is a TimeFrameGroups object (a list of nilmtk.TimeFrame objects)
"""
name = "overbasepower_sections"
def __init__(self, max_sample_rate):
# Used to know when to combine
self.max_sample_rate = max_sample_rate
super(OverBasepowerSectionsResults, self).__init__()
def append(self, timeframe, new_results):
"""Append a single result.
Parameters
----------
timeframe : nilmtk.TimeFrame
new_results : {'sections': list of TimeFrame objects}
"""
super(OverBasepowerSectionsResults,
self).append(timeframe, new_results)
def finalize(self):
""" Merges together any nonzero sections which span multiple segments.
Whether there are gaps in between does not matter.
Returns
-------
sections : TimeFrameGroup (a subclass of Python's list class)
"""
# Merge the results of all chunks
starts = []
ends = []
for index, row in self._data.iterrows():
starts.append(row['sections']['start'])
ends.append(row['sections']['end'])
if len(starts) == 0 == len(ends):
self._data = TimeFrameGroup()
return
starts = pd.concat(starts)
ends = pd.concat(ends)
rate = pd.Timedelta(seconds=self.max_sample_rate)
self._data = TimeFrameGroup(starts_and_ends={
'starts': starts,
'ends': ends
}) #.merge_shorter_gaps_than(rate) TODO: Merge needed?
def unify(self, other):
raise Exception("Did not try this yet for the new nonzeroresults")
super(OverBasepowerSectionsResults, self).unify(other)
for start, row in self._data.iterrows():
other_sections = other._data['sections'].loc[start]
intersection = row['sections'].intersection(other_sections)
self._data['sections'].loc[start] = intersection
def to_dict(self):
overbasepower_sections = self._data
overbasepower_sections_list_of_dicts = [
timeframe.to_dict() for timeframe in overbasepower_sections
]
return {
'statistics': {
'overbasepower_sections': overbasepower_sections_list_of_dicts
}
}
def plot(self, **plot_kwargs):
timeframes = self
return timeframes.plot(**plot_kwargs)
def import_from_cache(self, cached_stat, sections):
''' Stores the statistic into the cache of the nilmtk.DataStore
Note
----
I do not know whether this is still an issue:
HIER IST DAS PROBLEM BEIM STATISTIKEN LESEN!
DIE WERDEN CHUNK Weise GESPEICHERT, aber hier wird auf
das Vorhandensein der gesamten Section als ganzes vertraut.
'''
self._data = TimeFrameGroup(cached_stat)
def export_to_cache(self):
"""
Returns the DataFrame to be written into cache.
Returns
-------
df: pd.DataFrame
With three columns: 'end', 'section_end', 'section_start.
"""
return self._data._df
def import_from_cache(self, cached_stat, sections):
self._data = TimeFrameGroup(cached_stat)
def _save_metadata_for_disaggregation(self,
output_datastore,
sample_period,
measurement,
timeframes,
building,
meters=None,
num_meters=None,
supervised=True,
original_building_meta=None,
rest_powerflow_included=False):
"""Add metadata for disaggregated appliance estimates to datastore.
REMINDER: Also urpruenglich wollte ich das anders machen und eben auch die Metadatan mit abspeichern.
Habe ich aus zeitgruenden dann gelassen und mache es doch so wie es vorher war.
This function first checks whether there are already metainformation in the file.
If zes, it extends them and otherwise it removes them.
Note that `self.MODEL_NAME` needs to be set to a string before
calling this method. For example, we use `self.MODEL_NAME = 'CO'`
for Combinatorial Optimisation.
TODO:`preprocessing_applied` for all meters
TODO: submeter measurement should probably be the mains
measurement we used to train on, not the mains measurement.
Parameters
----------
output_datastore : nilmtk.DataStore subclass object
The datastore to write metadata into.
sample_period : int
The sample period, in seconds, used for both the
mains and the disaggregated appliance estimates.
measurement : 2-tuple of strings
In the form (<physical_quantity>, <type>) e.g.
("power", "active")
timeframes : list of nilmtk.TimeFrames or nilmtk.TimeFrameGroup
The TimeFrames over which this data is valid for.
building : int
The building instance number (starting from 1)
supervised : bool, defaults to True
Is this a supervised NILM algorithm?
meters : list of nilmtk.ElecMeters, optional
Required if `supervised=True`
num_meters : [int]
Required if `supervised=False`, Gives for each phase amount of meters
"""
# DataSet and MeterDevice metadata only when not already available
try:
metadata = output_datastore.load_metadata()
timeframes.append(
TimeFrame(start=metadata["timeframe"]["start"],
end=metadata["timeframe"]["end"]))
total_timeframe = TimeFrameGroup(timeframes).get_timeframe()
dataset_metadata = {
'name': metadata["name"],
'date': metadata["date"],
'meter_devices': metadata["meter_devices"],
'timeframe': total_timeframe.to_dict()
}
output_datastore.save_metadata('/', dataset_metadata)
except:
pq = 3
meter_devices = {
'disaggregate': {
'model':
type(self), #self.model.MODEL_NAME,
'sample_period':
sample_period if rest_powerflow_included else
0, # Makes it possible to use special load functionality
'max_sample_period':
sample_period,
'measurements': [{
'physical_quantity':
'power', #measurement.levels[0][0],
'type': 'active' #measurement.levels, #[1][0]
}]
}
}
if rest_powerflow_included:
meter_devices['rest'] = {
'model':
'rest',
'sample_period':
sample_period,
'max_sample_period':
sample_period,
'measurements': [{
'physical_quantity':
'power', #measurement.levels, #[0][0],
'type': 'active' #measurement.levels, #[1][0]
}]
}
total_timeframe = TimeFrameGroup(timeframes).get_timeframe()
date_now = datetime.now().isoformat().split('.')[0]
dataset_metadata = {
'name': type(self),
'date': date_now,
'meter_devices': meter_devices,
'timeframe': total_timeframe.to_dict()
}
output_datastore.save_metadata('/', dataset_metadata)
# Building metadata always stored for the new buildings
for i in range(len(num_meters)):
phase_building = building * 10 + i
building_path = '/building{}'.format(phase_building)
mains_data_location = building_path + '/elec/meter1'
# Rest meter:
elec_meters = {}
if rest_powerflow_included:
elec_meters[1] = {
'device_model': 'rest',
#'site_meter': True,
'data_location': mains_data_location,
'preprocessing_applied': {}, # TODO
'statistics': {
'timeframe': total_timeframe.to_dict()
}
}
def update_elec_meters(meter_instance):
elec_meters.update({
meter_instance: {
'device_model':
'disaggregate', # self.MODEL_NAME,
'submeter_of':
1,
'data_location':
('{}/elec/meter{}'.format(building_path,
meter_instance)),
'preprocessing_applied': {}, # TODO
'statistics': {
'timeframe': total_timeframe.to_dict()
}
}
})
# Appliances and submeters:
appliances = []
if supervised:
for meter in meters:
meter_instance = meter.instance()
update_elec_meters(meter_instance)
for app in meter.appliances:
appliance = {
'meters': [meter_instance],
'type': app.identifier.type,
'instance': app.identifier.instance
# TODO this `instance` will only be correct when the
# model is trained on the same house as it is tested on
# https://github.com/nilmtk/nilmtk/issues/194
}
appliances.append(appliance)
# Setting the name if it exists
if meter.name:
if len(meter.name) > 0:
elec_meters[meter_instance]['name'] = meter.name
else: # Unsupervised
# Submeters:
# Starts at 2 because meter 1 is mains.
for chan in range(2, num_meters[i] +
1): # Additional + 1 because index 0 skipped
update_elec_meters(meter_instance=chan)
appliance = {
'meters': [chan],
'type': 'unknown',
'instance': chan - 1
# TODO this `instance` will only be correct when the
# model is trained on the same house as it is tested on
# https://github.com/nilmtk/nilmtk/issues/194
}
appliances.append(appliance)
if len(appliances) == 0:
continue
building_metadata = {
'instance': (phase_building),
'elec_meters':
elec_meters,
'appliances':
appliances,
'original_name':
original_building_meta['original_name']
if 'original_name' in original_building_meta else None,
'geo_location':
original_building_meta['geo_location']
if 'geo_location' in original_building_meta else None,
'zip':
original_building_meta['zip']
if 'zip' in original_building_meta else None,
}
print(building_path)
output_datastore.save_metadata(building_path, building_metadata)
def load(self,
key,
columns=None,
sections=None,
n_look_ahead_rows=0,
chunksize=MAX_MEM_ALLOWANCE_IN_BYTES,
verbose=False,
**additionalLoaderKwargs):
# TODO: calculate chunksize default based on physical
# memory installed and number of columns
# Make sure key has a slash at the front but not at the end.
if key[0] != '/':
key = '/' + key
if len(key) > 1 and key[-1] == '/':
key = key[:-1]
# Make sure chunksize is an int otherwise `range` complains later.
chunksize = np.int64(chunksize)
# Set `sections` variable
sections = [TimeFrame()] if sections is None else sections
sections = TimeFrameGroup(sections)
# Replace any Nones with '' in cols:
if columns is not None:
columns = [('' if pq is None else pq, '' if ac is None else ac)
for pq, ac in columns]
cols_idx = pd.MultiIndex.from_tuples(
columns, names=['physical_quantity', 'type'])
if verbose:
print("HDFDataStore.load(key='{}', columns='{}', sections='{}',"
" n_look_ahead_rows='{}', chunksize='{}')".format(
key, columns, sections, n_look_ahead_rows, chunksize))
self.all_sections_smaller_than_chunksize = True
for section in sections:
if verbose:
print(" ", section)
window_intersect = self.window.intersection(section)
if window_intersect.empty: # Wenn der abgefragte Zeitabschnitt nicht in der Datenreihe enthalten ist
data = pd.DataFrame(columns=cols_idx)
data.timeframe = section
yield data
continue
terms = window_intersect.query_terms('window_intersect')
if terms is None:
section_start_i = 0
section_end_i = self.store.get_storer(key).nrows
if section_end_i <= 1:
data = pd.DataFrame(columns=cols_idx)
data.timeframe = section
yield data
continue
else:
try:
coords = self.store.select_as_coordinates(key=key,
where=terms)
except AttributeError as e:
if str(e) == ("'NoneType' object has no attribute "
"'read_coordinates'"):
raise KeyError("key '{}' not found".format(key))
else:
raise
n_coords = len(coords)
if n_coords == 0:
data = pd.DataFrame(columns=cols_idx)
data.timeframe = window_intersect
yield data
continue
section_start_i = coords[0]
section_end_i = coords[-1]
if section_start_i == section_end_i: # For corner cases where there is really only a single entry.
section_end_i += 1
del coords
slice_starts = range(section_start_i, section_end_i, chunksize)
n_chunks = int(
np.ceil((section_end_i - section_start_i) / chunksize))
if n_chunks > 1:
self.all_sections_smaller_than_chunksize = False
for chunk_i, chunk_start_i in enumerate(slice_starts):
chunk_end_i = chunk_start_i + chunksize
there_are_more_subchunks = (chunk_i < n_chunks - 1)
if chunk_end_i > section_end_i:
chunk_end_i = section_end_i
chunk_end_i += 1
data = self.store.select(key=key,
columns=cols_idx,
start=chunk_start_i,
stop=chunk_end_i)
if len(data) <= 2:
data = pd.DataFrame(columns=cols_idx)
data.timeframe = section
yield data
# Load look ahead if necessary
if n_look_ahead_rows > 0:
if len(data.index) > 0:
look_ahead_start_i = chunk_end_i
look_ahead_end_i = look_ahead_start_i + n_look_ahead_rows
try:
data.look_ahead = self.store.select(
key=key,
columns=columns,
start=look_ahead_start_i,
stop=look_ahead_end_i)
except ValueError:
data.look_ahead = pd.DataFrame()
else:
data.look_ahead = pd.DataFrame()
data.timeframe = _timeframe_for_chunk(there_are_more_subchunks,
chunk_i,
window_intersect,
data.index)
yield data
del data
def _get_stat_from_cache_or_compute(self, nodes, results_obj,
loader_kwargs):
"""General function for computing statistics and/or loading them from
cache.
Cached statistics lives in the DataStore at
'building<I>/elec/cache/meter<K>/<statistic_name>' e.g.
'building1/elec/cache/meter1/total_energy'. We store the
'full' statistic... i.e we store a representation of the `Results._data`
DataFrame. Some times we need to do some conversion to store
`Results._data` on disk. The logic for doing this conversion lives
in the `Results` class or subclass. The cache can be cleared by calling
`ElecMeter.clear_cache()`.
Parameters
----------
nodes : list of nilmtk.Node classes
results_obj : instance of nilmtk.Results subclass
loader_kwargs : dict
Returns
-------
if `full_results` is True then return nilmtk.Results subclass
instance otherwise return nilmtk.Results.simple().
See Also
--------
clear_cache
_compute_stat
key_for_cached_stat
get_cached_stat
"""
full_results = loader_kwargs.pop('full_results', False)
verbose = loader_kwargs.get('verbose')
if 'ac_type' in loader_kwargs or 'physical_quantity' in loader_kwargs:
loader_kwargs = self._convert_physical_quantity_and_ac_type_to_cols(
**loader_kwargs)
columns = loader_kwargs.get('columns', [])
ac_types = set([m[1] for m in columns if m[1]])
results_obj_copy = deepcopy(results_obj)
# Prepare `sections` list
sections = loader_kwargs.get('sections')
if sections is None:
tf = self.get_timeframe()
tf.include_end = True
sections = [tf]
sections = TimeFrameGroup(sections)
sections = [s for s in sections if not s.empty]
# Retrieve usable stats from cache
key_for_cached_stat = self.key_for_cached_stat(results_obj.name)
if loader_kwargs.get('preprocessing') is None:
cached_stat = self.get_cached_stat(key_for_cached_stat)
results_obj.import_from_cache(cached_stat, sections)
def find_sections_to_compute():
# Get sections_to_compute
results_obj_timeframes = results_obj.timeframes()
sections_to_compute = set(sections) - set(
results_obj_timeframes)
sections_to_compute = sorted(sections_to_compute)
return sections_to_compute
try:
ac_type_keys = results_obj.simple().keys()
except:
sections_to_compute = find_sections_to_compute()
else:
if ac_types.issubset(ac_type_keys):
sections_to_compute = find_sections_to_compute()
else:
sections_to_compute = sections
results_obj = results_obj_copy
else:
sections_to_compute = sections
if verbose and not results_obj._data.empty:
print("Using cached result.")
# If we get to here then we have to compute some stats
if sections_to_compute:
loader_kwargs['sections'] = sections_to_compute
computed_result = self._compute_stat(nodes, loader_kwargs)
# Merge cached results with newly computed
results_obj.update(computed_result.results)
# Save to disk newly computed stats
stat_for_store = computed_result.results.export_to_cache()
try:
self.store.append(key_for_cached_stat, stat_for_store)
except ValueError:
# the old table probably had different columns
self.store.remove(key_for_cached_stat)
self.store.put(key_for_cached_stat,
results_obj.export_to_cache())
if full_results:
return results_obj
else:
res = results_obj.simple()
if ac_types:
try:
ac_type_keys = res.keys()
except:
return res
else:
if res.empty:
return res
else:
return pd.Series(res[ac_types], index=ac_types)
else:
return res
def load(self,
key,
columns=None,
sections=None,
n_look_ahead_rows=0,
chunksize=MAX_MEM_ALLOWANCE_IN_BYTES,
verbose=False,
**additionalLoaderKwargs):
'''
Load measurments over a certain period of time.
The resampling is taking place on the serverside to save bandwidth. This is different from the
HDF datastore where always all data is loaded and then resampled.
'''
# TODO: calculate chunksize default based on physical
# memory installed and number of columns
# Make sure key has a slash at the front but not at the end.
if key[0] != '/':
key = '/' + key
if len(key) > 1 and key[-1] == '/':
key = key[:-1]
sample_period = additionalLoaderKwargs["sample_period"]
# Make sure chunksize is an int otherwise `range` complains later.
chunksize = np.int64(chunksize)
# Set `sections` variable
sections = [TimeFrame()] if sections is None else sections
sections = TimeFrameGroup(sections)
# Replace any Nones with '' in cols:
if columns is not None:
columns = [('' if pq is None else pq, '' if ac is None else ac)
for pq, ac in columns]
cols_idx = pd.MultiIndex.from_tuples(
columns, names=['physical_quantity', 'type'])
columnsStr = []
for i, val in enumerate(columns):
columnsStr.append(str(columns[i]))
columnsStr = str(columnsStr)
if verbose:
print("HDFDataStore.load(key='{}', columns='{}', sections='{}',"
" n_look_ahead_rows='{}', chunksize='{}')".format(
key, columns, sections, n_look_ahead_rows, chunksize))
self.all_sections_smaller_than_chunksize = True
for section in sections:
if verbose:
print(" ", section)
window_intersect = self.window.intersection(section)
if window_intersect.empty: # Wenn der abgefragte Zeitabschnitt nicht in der Datenreihe enthalten ist
data = pd.DataFrame(columns=cols_idx)
data.timeframe = section
yield data
continue
# The estimation of fitting slices is avoided
delta = section.end - section.start
n_chunks = int(
np.ceil((delta.total_seconds() / sample_period / chunksize)))
delta = delta / n_chunks
slice_starts = []
for i in range(n_chunks):
slice_starts.append(section.start + delta * i)
if n_chunks > 1:
self.all_sections_smaller_than_chunksize = False
# Load the sections
for chunk_i, chunk_start_i in enumerate(slice_starts):
chunk_end_i = chunk_start_i + datetime.timedelta(
seconds=int(chunksize))
there_are_more_subchunks = (chunk_i < n_chunks - 1)
if chunk_end_i > section.end:
chunk_end_i = section.end
# The required parameter form is: base={lat}/{lng}/{deviceKey}/{deviceType} + {start}/{end}/{columns}/{sample_rate}
iso_chunk_start = chunk_start_i.isoformat()
iso_chunk_end = chunk_end_i.isoformat()
data = self._execute_request("load",
type="GET",
parameters={
"url":
key,
"start":
iso_chunk_start,
"end":
iso_chunk_end,
"columns":
columnsStr,
"sample_period":
str(sample_period)
})
data = self._jsonDataToPandasDF(columns, data)
if len(data) <= 2:
data = pd.DataFrame(columns=cols_idx)
data.timeframe = section
yield data
# Load look ahead if necessary
if n_look_ahead_rows > 0:
if len(data.index) > 0:
look_ahead_start_i = chunk_end_i
look_ahead_end_i = look_ahead_start_i + n_look_ahead_rows
try:
#data.look_ahead = self.store.select(
# key=key, columns=columns,
# start=look_ahead_start_i,
# stop=look_ahead_end_i)
data = self._execute_request(
"load",
type="GET",
parameters={
"url": key,
"start": look_ahead_start_i,
"end": look_ahead_end_i,
"columns": columnsStr,
"sample_period": sample_period
})
data = self._jsonDataToPandasDF(columns, data)
except ValueError:
data.look_ahead = pd.DataFrame()
else:
data.look_ahead = pd.DataFrame()
data.timeframe = _timeframe_for_chunk(there_are_more_subchunks,
chunk_i,
window_intersect,
data.index)
yield data
del data
def load(self,
key,
columns=None,
sections=None,
n_look_ahead_rows=0,
chunksize=MAX_MEM_ALLOWANCE_IN_BYTES,
verbose=False):
# TODO: calculate chunksize default based on physical
# memory installed and number of columns
# Make sure key has a slash at the front but not at the end.
if key[0] != '/':
key = '/' + key
if len(key) > 1 and key[-1] == '/':
key = key[:-1]
# Make sure chunksize is an int otherwise `range` complains later.
chunksize = np.int64(chunksize)
# Set `sections` variable
sections = [TimeFrame()] if sections is None else sections
sections = TimeFrameGroup(sections)
# Replace any Nones with '' in columns:
if columns is not None:
columns = [('' if pq is None else pq, '' if ac is None else ac)
for pq, ac in columns]
if verbose:
print("HDFDataStore.load(key='{}', columns='{}', sections='{}',"
" n_look_ahead_rows='{}', chunksize='{}')".format(
key, columns, sections, n_look_ahead_rows, chunksize))
self.all_sections_smaller_than_chunksize = True
for section in sections:
if verbose:
print(" ", section)
window_intersect = self.window.intersection(section)
if window_intersect.empty:
data = pd.DataFrame()
data.timeframe = section
yield data
continue
terms = window_intersect.query_terms('window_intersect')
if terms is None:
section_start_i = 0
section_end_i = self.store.get_storer(key).nrows
if section_end_i <= 1:
data = pd.DataFrame()
data.timeframe = section
yield data
continue
else:
try:
coords = self.store.select_as_coordinates(key=key,
where=terms)
except AttributeError as e:
if str(e) == ("'NoneType' object has no attribute "
"'read_coordinates'"):
raise KeyError("key '{}' not found".format(key))
else:
raise
n_coords = len(coords)
if n_coords == 0:
data = pd.DataFrame()
data.timeframe = window_intersect
yield data
continue
section_start_i = coords[0]
section_end_i = coords[-1]
del coords
slice_starts = range(section_start_i, section_end_i, chunksize)
n_chunks = int(
np.ceil((section_end_i - section_start_i) / chunksize))
if n_chunks > 1:
self.all_sections_smaller_than_chunksize = False
for chunk_i, chunk_start_i in enumerate(slice_starts):
chunk_end_i = chunk_start_i + chunksize
there_are_more_subchunks = (chunk_i < n_chunks - 1)
if chunk_end_i > section_end_i:
chunk_end_i = section_end_i
chunk_end_i += 1
data = self.store.select(key=key,
columns=columns,
start=chunk_start_i,
stop=chunk_end_i)
# if len(data) <= 2:
# yield pd.DataFrame()
# Load look ahead if necessary
if n_look_ahead_rows > 0:
if len(data.index) > 0:
look_ahead_start_i = chunk_end_i
look_ahead_end_i = look_ahead_start_i + n_look_ahead_rows
try:
look_ahead = self.store.select(
key=key,
columns=columns,
start=look_ahead_start_i,
stop=look_ahead_end_i)
except ValueError:
look_ahead = pd.DataFrame()
else:
look_ahead = pd.DataFrame()
with warnings.catch_warnings():
# Silence "Pandas doesn't allow columns to be created via a new attribute name"
# since we're not adding a column
warnings.filterwarnings(
'ignore',
category=UserWarning,
message=".*Pandas doesn't allow columns.*")
setattr(data, 'look_ahead', look_ahead)
data.timeframe = _timeframe_for_chunk(there_are_more_subchunks,
chunk_i,
window_intersect,
data.index)
yield data
del data
def _classify_activation_quality(self, nilmtk_activations):
def get_stale_seconds(act):
actdiff = act.resample("{:d}S".format(self.sample_period)).mean().ffill().diff()
return (actdiff == 0.0).sum() * self.sample_period
def activation_filter(tf, building_data):
start_time = tf.start
end_time = tf.end
df = building_data[start_time:end_time]
if df.empty:
return False
else:
act_stale_seconds = get_stale_seconds(df['target'])
act_duration = (end_time - start_time).total_seconds()
act_stale_pct = act_stale_seconds / act_duration
mains_stale_seconds = get_stale_seconds(df['mains'])
mains_stale_pct = get_stale_seconds(df['mains']) / act_duration
if (act_stale_pct < self.activation_max_stale_pct) & (mains_stale_pct < self.mains_max_stale_pct):
return True
else:
return False
good_timeframes = {}
bad_timeframes = {}
all_timeframes = {}
for fold, buildings_per_appliances in nilmtk_activations.items():
good_timeframes[fold] = {}
bad_timeframes[fold] = {}
all_timeframes[fold] = {}
for appliance, activations_per_building in buildings_per_appliances.items():
good_timeframes[fold][appliance] = {}
bad_timeframes[fold][appliance] = {}
all_timeframes[fold][appliance] = {}
for building, activations in activations_per_building.items():
building_data = self.data[fold][building]
good_timeframes_per_building = TimeFrameGroup()
bad_timeframes_per_building = TimeFrameGroup()
all_timeframes_per_building = TimeFrameGroup()
for i, activation in enumerate(activations):
tf = TimeFrame(
start=activation.index[0],
end=activation.index[-1] + pd.Timedelta(seconds=self.sample_period))
all_timeframes_per_building.append(tf)
if activation_filter(tf, building_data):
good_timeframes_per_building.append(tf)
else:
bad_timeframes_per_building.append(tf)
good_timeframes[fold][appliance][building] = good_timeframes_per_building
bad_timeframes[fold][appliance][building] = bad_timeframes_per_building
all_timeframes[fold][appliance][building] = all_timeframes_per_building
#
self.clean_active_timeframes = good_timeframes
self.all_active_timeframes = all_timeframes
self.phony_active_timeframes = bad_timeframes
