def get_data(column, np_values, alpha):
mvs = bayes_mvs(np_values, alpha)
#report these metrics
output = [
present("Column", column),
present("Length", len(np_values)),
present("Unique", len(np.unique(np_values))),
present("Min", np_values.min()),
present("Max", np_values.max()),
present("Mid-Range", (np_values.max() - np_values.min())/2),
present("Range", np_values.max() - np_values.min()),
present("Mean", np_values.mean()),
present("Mean-%s-CI" % alpha, tupleToString(mvs[0][1])),
present("Variance", mvs[1][0]),
present("Var-%s-CI" % alpha, tupleToString(mvs[1][1])),
present("StdDev", mvs[2][0]),
present("Std-%s-CI" % alpha, tupleToString(mvs[2][1])),
present("Mode", stats.mode(np_values)[0][0]),
present("Q1", stats.scoreatpercentile(np_values, 25)),
present("Q2", stats.scoreatpercentile(np_values, 50)),
present("Q3", stats.scoreatpercentile(np_values, 75)),
present("Trimean", trimean(np_values)),
present("Minhinge", midhinge(np_values)),
present("Skewness", stats.skew(np_values)),
present("Kurtosis", stats.kurtosis(np_values)),
present("StdErr", sem(np_values)),
present("Normal-P-value", normaltest(np_values)[1])
]
return output
def get_data(column, np_values, alpha):
mvs = bayes_mvs(np_values, alpha)
#report these metrics
output = [
present("Column", column),
present("Length", len(np_values)),
present("Unique", len(np.unique(np_values))),
present("Min", np_values.min()),
present("Max", np_values.max()),
present("Mid-Range", (np_values.max() - np_values.min()) / 2),
present("Range",
np_values.max() - np_values.min()),
present("Mean", np_values.mean()),
present("Mean-%s-CI" % alpha, tupleToString(mvs[0][1])),
present("Variance", mvs[1][0]),
present("Var-%s-CI" % alpha, tupleToString(mvs[1][1])),
present("StdDev", mvs[2][0]),
present("Std-%s-CI" % alpha, tupleToString(mvs[2][1])),
present("Mode",
stats.mode(np_values)[0][0]),
present("Q1", stats.scoreatpercentile(np_values, 25)),
present("Q2", stats.scoreatpercentile(np_values, 50)),
present("Q3", stats.scoreatpercentile(np_values, 75)),
present("Trimean", trimean(np_values)),
present("Minhinge", midhinge(np_values)),
present("Skewness", stats.skew(np_values)),
present("Kurtosis", stats.kurtosis(np_values)),
present("StdErr", sem(np_values)),
present("Normal-P-value",
normaltest(np_values)[1])
]
return output
def _compute_params(self, features):
m = features.shape[1]
percentiles = np.ones((2, m)) * np.nan
for j in xrange(m):
percentiles[0, j] = scoreatpercentile(features[:, j], self.lower_q)
percentiles[1, j] = scoreatpercentile(features[:, j], self.upper_q)
return percentiles
def _compute_params(self, features):
m = features.shape[1]
percentiles = np.ones((2, m)) * np.nan
for j in xrange(m):
percentiles[0, j] = scoreatpercentile(features[:, j], self.lower_q)
percentiles[1, j] = scoreatpercentile(features[:, j], self.upper_q)
return percentiles
def _compute_percentiles(features):
m = features.shape[1]
percentiles = np.ones((2, m)) * np.nan
for j in xrange(m):
percentiles[0, j] = scoreatpercentile(features[:, j], 1)
percentiles[1, j] = scoreatpercentile(features[:, j], 99)
return percentiles
def showStatistics(key=None, domain=True, dist=False, cumdist=False, clip=None, vmin=None, vmax=None, percentile=False):
"""Show the values corresponding with key in the specified mode.
key is one of the keys of SelectableStatsValues
mode is one of ['On Domain','Histogram','Cumulative Histogram']
"""
S = selection.check(single=True)
if S:
func, onEdges = SelectableStatsValues[key]
kargs = {}
if key == "Curvature":
kargs["neighbours"] = _stat_dia.results["neighbours"]
val = func(S, **kargs)
if key == "Curvature":
ind = CurvatureValues.index(_stat_dia.results["curval"])
val = val[ind]
val = val[S.elems]
# !! THIS SHOULD BE IMPLEMENTED AS A GENERAL VALUE CLIPPER
# !! e.g popping up when clicking the legend
# !! and the values should be changeable
if clip:
clip = clip.lower()
if percentile:
try:
from scipy.stats.stats import scoreatpercentile
except:
warning(
"""..
**The **percentile** clipping option is not available.
Most likely because 'python-scipy' is not installed on your system."""
)
return
Q1 = scoreatpercentile(val, vmin)
Q3 = scoreatpercentile(val, vmax)
factor = 3
if vmin:
vmin = Q1 - factor * (Q3 - Q1)
if vmax:
vmax = Q3 + factor * (Q3 - Q1)
if clip == "top":
val = val.clip(max=vmax)
elif clip == "bottom":
val = val.clip(min=vmin)
else:
val = val.clip(vmin, vmax)
if domain:
clear()
lights(False)
showSurfaceValue(S, key, val, onEdges)
if dist:
showHistogram(key, val, cumulative=False)
if cumdist:
showHistogram(key, val, cumulative=True)
def hit_detection_proliferation(res, who, who_mitotic_hits, ctrl_points, whis=1.5):
q3=scoreatpercentile(ctrl_points, per=75)
q1=scoreatpercentile(ctrl_points, per=25)
val=q1-whis*(q3-q1)
hits=np.where(res<=val)[0]
return filter(lambda x: x not in who_mitotic_hits, np.array(who)[hits])
def normalize(data):
wtdata = array(data)
wtdata[wtdata < 0] = 0
q1 = stats.scoreatpercentile(wtdata, 25)
q3 = stats.scoreatpercentile(wtdata, 75)
interquart = q3 - q1
tenperc = stats.scoreatpercentile(wtdata[wtdata <= q1 + 1.5 * interquart], 90)
maxav = wtdata[wtdata >= tenperc].mean()
wtdata = wtdata / maxav
return wtdata
def hit_detection_pheno_score(res, who, ctrl_points, whis=1.5):
'''
Permissive hit detection taking experiments where Interphase phenotypic score is under the bottom whisker,
which is 1.5*IQR
'''
q3=scoreatpercentile(ctrl_points[:,CLASSES.index('Interphase')], per=75)
q1=scoreatpercentile(ctrl_points[:,CLASSES.index('Interphase')], per=25)
val=q1-whis*(q3-q1)
hits=np.where(res[:,CLASSES.index('Interphase')]<=val)[0]
return res[hits], np.array(who)[hits]
def normalize(bonuses):
l = len(bonuses)
wtdata = array(bonuses)
if wtdata.min() < 0:
wtdata -= wtdata.min()
interquart = stats.scoreatpercentile(wtdata, 75) - stats.scoreatpercentile(wtdata, 25)
tenperc = stats.scoreatpercentile(wtdata, 90)
maxcount = 0
maxav = 0.
for i in range(l):
if wtdata[i] >= tenperc:
maxav += wtdata[i]
maxcount += 1
maxav /= maxcount
wtdata = wtdata/maxav
return wtdata
def graphWorking(trajdist, mds_transformed, genes=None, percentile=10, only_high_degree=True, clustering_labels=None):
couleurs=['green', 'red', 'blue', 'orange', 'yellow', "white", 'purple', 'pink', 'grey']
newtrajdist=np.array(trajdist)
newtrajdist[np.where(newtrajdist>scoreatpercentile(newtrajdist.flatten(), percentile))]=0
G=nx.from_numpy_matrix(newtrajdist); labels={}
#maintenant les edges ont bien les poids que l'on voudrait mais on ne peut pas faire de plots pcq il faut donner les positions des noeuds. Utiliser les resultats MDS pr ca
for el in G.nodes():
G.node[el]['pos']=mds_transformed[el][:2]
if genes is not None:
labels[el]=genes[el]
pos=nx.get_node_attributes(G,'pos')
p.figure(figsize=(8,8))
if not only_high_degree:
nx.draw_networkx_edges(G,pos,alpha=0.4)
node_color=[float(G.degree(v)) for v in G] if clustering_labels is None else [couleurs[k] for k in clustering_labels]
nx.draw_networkx_nodes(G,pos,
node_size=60,
node_color=node_color,
cmap=p.cm.Reds_r)
else:
degrees=np.array([float(G.degree(v)) for v in G])
wh_=np.where(degrees>=scoreatpercentile(degrees, 90))[0]
pos={x:pos[x] for x in pos if x in wh_}
labels={x:labels[x] for x in pos}
for k in range(len(genes)):
if k not in pos:
G.remove_node(k)
node_color=[float(G.degree(v)) for v in G]
nx.draw_networkx_edges(G,pos,alpha=0.4)
nx.draw_networkx_nodes(G,pos,
node_size=60,
node_color=node_color,
cmap=p.cm.Reds_r)
nx.draw_networkx_labels(G, pos, labels, font_size=10)
p.axis('off')
p.show()
return G
def compute_fft_stats(self):
if config.args.conflicts == config.ADD_FILES and \
(os.path.exists(self.fivepseq_out.get_file_path(FivePSeqOut.FFT_SIGNALS_TERM)) &
os.path.exists(self.fivepseq_out.get_file_path(FivePSeqOut.FFT_SIGNALS_START)) &
os.path.exists(self.fivepseq_out.get_file_path(FivePSeqOut.FFT_STATS_DF_FILE))):
self.logger.info(
"Skipping FFT statistics calculation: files already exist")
else:
self.logger.info("Computing FFT statistics")
count_vector_list = self.fivepseq_counts.get_count_vector_list(
FivePSeqCounts.FULL_LENGTH)
span_size = self.fivepseq_counts.annotation.span_size
lengths = [0] * len(count_vector_list)
for i in range(len(count_vector_list)):
count_vector = count_vector_list[i][
span_size:len(count_vector_list[i]) - span_size]
lengths[i] = len(count_vector)
# align start
size = int(stats.scoreatpercentile(lengths, per=25))
num = 3 * len(count_vector_list) // 4
start_array = np.zeros((num, size))
term_array = np.zeros((num, size))
ind = 0
for i in range(len(count_vector_list)):
count_vector = count_vector_list[i][
span_size:len(count_vector_list[i]) - span_size]
if (len(count_vector)) > size:
start_array[ind, :] = count_vector[0:size]
term_array[ind, :] = count_vector[len(count_vector) -
size:len(count_vector)]
ind += 1
start_mean = start_array.mean(axis=0)
term_mean = term_array.mean(axis=0)
self.fft_stats_start = self.fft_stats_on_vector(start_mean, 5)
self.fft_stats_term = self.fft_stats_on_vector(term_mean, 5)
self.fft_stats_df = pd.DataFrame(data=[
self.fft_stats_start[1], self.fft_stats_start[2],
self.fft_stats_start[3], self.fft_stats_term[1],
self.fft_stats_term[2], self.fft_stats_term[3]
],
index=[
"START_periods",
"START_signals",
"START_scales",
"TERM_periods",
"TERM_signals", "TERM_scales"
])
self.logger.info("Writing FFT stats")
self.fivepseq_out.write_df_to_file(self.fft_stats_df,
FivePSeqOut.FFT_STATS_DF_FILE)
self.fivepseq_out.write_series_to_file(
self.fft_stats_start[0], FivePSeqOut.FFT_SIGNALS_START)
self.fivepseq_out.write_series_to_file(
self.fft_stats_term[0], FivePSeqOut.FFT_SIGNALS_TERM)
def createFeldmanRanking(protectedCandidates, nonProtectedCandidates, k):
"""
creates a ranking that promotes the protected candidates by adjusting the distribution of the
qualifications of the protected and non-protected group
IMPORTANT: THIS METHOD MODIFIES THE ORIGINAL LIST OF PROTECTED CANDIDATES!
I.e. it modifies the qualification of the
protected candidates. If the original list has to be preserved, it has to be deep-copied into a
new data structure, before handed over into this method.
steps:
1. take a protected candidate x
2. determine the percentile of that candidate within their group percentile(x)
3. find a non-protected candidate y that has the same percentile(y) == percentile(x)
4. assign the score of y to x
5. goto 1
Parameters:
----------
:param protectedCandidates: array of protected candidates
:param nonProtectedCandidates: array of non-protected candidates
:param k: length of the ranking to return
Return:
------
a ranking of protected and non-protected candidates, which tries to have a better share of
protected and non-protected candidates
"""
# ensure candidates are sorted by descending qualificiations
protectedCandidates.sort(key=lambda candidate: candidate.qualification,
reverse=True)
nonProtectedCandidates.sort(key=lambda candidate: candidate.qualification,
reverse=True)
protectedQualifications = [
protectedCandidates[i].qualification
for i in range(len(protectedCandidates))
]
nonProtectedQualifications = [
nonProtectedCandidates[i].qualification
for i in range(len(nonProtectedCandidates))
]
# create same distribution for protected and non-protected candidates
for i, candidate in enumerate(protectedCandidates):
if i >= k:
# only need to adapt the scores for protected candidates up to required length
# the rest will not be considered anyway
break
# find percentile of protected candidate
p = percentileofscore(protectedQualifications, candidate.qualification)
# find score of a non-protected in the same percentile
score = scoreatpercentile(nonProtectedQualifications, p)
candidate.qualification = score
# create a colorblind ranking
return createFairRanking(k, protectedCandidates, nonProtectedCandidates,
ESSENTIALLY_ZERO, 0.1)
def get_goat_indicies(self):
"""Return the indicies of goat user.
Speration is done at 30th (or 70th) percentile.
Source: Exploiting the "Doddington Zoo" Effect in Biometric Fusion
"""
sorted_genuine = self._genuine_scores.copy()
sorted_genuine.sort()
if self._type == 'distance':
score = scoreatpercentile(sorted_genuine, 70)
indicies = np.where(self._genuine_scores>score)
elif self._type == 'score':
score = scoreatpercentile(sorted_genuine, 30)
indicies = np.where(self._genuine_scores<score)
return indicies[0]
def normalize(bonuses):
l = len(bonuses)
wtdata = array(bonuses)
if wtdata.min() < 0:
wtdata -= wtdata.min()
interquart = stats.scoreatpercentile(wtdata, 75) - stats.scoreatpercentile(
wtdata, 25)
tenperc = stats.scoreatpercentile(wtdata, 90)
maxcount = 0
maxav = 0.
for i in xrange(l):
if wtdata[i] >= tenperc:
maxav += wtdata[i]
maxcount += 1
maxav /= maxcount
wtdata = wtdata / maxav
return wtdata
def _create_cache_percentiles(self, predicate, resume=False):
controls = self._get_controls(predicate)
for i, (plate, imKeys) in enumerate(make_progress_bar('Percentiles')(controls.items())):
filename = self._percentiles_filename(plate)
if i == 0:
_check_directory(os.path.dirname(filename), resume)
if resume and os.path.exists(filename):
continue
features = self.cache.load(imKeys)[0]
if len(features) == 0:
logger.warning('No DMSO features for plate %s' % str(plate))
percentiles = np.zeros((0, len(self.cache.colnames)))
else:
m = features.shape[1]
percentiles = np.ones((2, m)) * np.nan
for j in xrange(m):
percentiles[0, j] = scoreatpercentile(features[:, j], 1)
percentiles[1, j] = scoreatpercentile(features[:, j], 99)
np.save(filename, percentiles)
def get_lamb_indicies(self):
"""Return the indicies of lambs users.
BUG: seems to not work
"""
lambs_scores = []
for userid in self._users_id:
presentations = self.get_impostor_presentations_of_user(userid)
best_matchings = []
# loop other the other user to get the best matching
gallery_ids = presentations.get_raw_gallery_userid(unique=True)
for gallery_id in gallery_ids:
assert gallery_id != userid
# Select only one gallery user
indicies = presentations._data[:,self.GALLERY] == gallery_id
impscores = presentations.get_raw_scores()[indicies]
if self._type == 'score':
selected_score = np.min(impscores)
elif self._type == 'distance' :
selected_score = np.max(impscores)
else:
raise "Impossible"
best_matchings.append(selected_score)
lambs_scores.append(np.mean(best_matchings))
lamb_score_sorted = np.sort(lambs_scores)
if self._type == 'distance':
score = scoreatpercentile(lamb_score_sorted, 10)
indicies = np.where(self._genuine_scores<score)
elif self._type == 'score':
score = scoreatpercentile(lamb_score_sorted, 90)
indicies = np.where(self._genuine_scores>score)
else:
raise "Impossible"
return indicies[0]
def _create_cache_percentiles(self, predicate, resume=False):
controls = self._get_controls(predicate)
for i, (plate, imKeys) in enumerate(
make_progress_bar('Percentiles')(controls.items())):
filename = self._percentiles_filename(plate)
if i == 0:
_check_directory(os.path.dirname(filename), resume)
if resume and os.path.exists(filename):
continue
features = self.cache.load(imKeys)[0]
if len(features) == 0:
logger.warning('No DMSO features for plate %s' % str(plate))
percentiles = np.zeros((0, len(self.cache.colnames)))
else:
m = features.shape[1]
percentiles = np.ones((2, m)) * np.nan
for j in xrange(m):
percentiles[0, j] = scoreatpercentile(features[:, j], 1)
percentiles[1, j] = scoreatpercentile(features[:, j], 99)
np.save(filename, percentiles)
def extract(self, point_cloud, neighborhood, target_point_cloud, target_index, volume_description):
"""
Extract the feature value(s) of the point cloud at location of the target.
:param point_cloud: environment (search space) point cloud
:param neighborhood: array of indices of points within the point_cloud argument
:param target_point_cloud: point cloud that contains target point
:param target_index: index of the target point within the target point cloud
:param volume_description: cell, sphere, cylinder or voxel size description
:target_index: index of the target point in the target point cloud
:return: feature value
"""
source_data = point_cloud[point][self.data_key]['data'][neighborhood]
return stats.scoreatpercentile(source_data, self.percentile)
def graphVisualClustering(genesTarget, mds_dist, genes, G):
result=[[] for k in range(len(genesTarget))]
arr=np.array([gene in genesTarget for gene in genes])
degrees=np.array([float(G.degree(v)) for v in G])
high_degrees=np.where(degrees>=scoreatpercentile(degrees, 90))[0]
for el in high_degrees:
gene=genes[el]
distances=cdist(mds_dist[np.newaxis, el], mds_dist[np.where(arr)])
print el, gene, np.argmax(distances)
result[np.argmax(distances)].append(gene)
return result
def greyscale(infile, outfile):
f = lasfile.File(infile,None,'rb')
h = f.header
# Projections for converting between the two
#utmproj = Proj(init="epsg:26910")
utmproj = Proj(r'+proj=utm +zone=10 +datum=NAD83 +units=us-ft +no_defs')
latproj = Proj(proj='latlong',datum='WGS84')
# Conversion from feet to meters
conv = 1.0/0.3048
tile_width = int(h.max[0] - h.min[0]) + 1
tile_height = int(h.max[1] - h.min[1]) + 1
height_offset = h.min[2]
img = Image.new("RGB", (tile_width, tile_height))
print "Image size: %d x %d" % (tile_width, tile_height)
zvals = []
for point in f:
zvals.append(point.z)
# Get a reasonable max height
max_height = stats.scoreatpercentile(zvals, 99.5)
depth_scale = 255/(max_height - h.min[2])
print "Computed max height (99.5 percentile): %.2f" % (max_height)
i = 0
for point in f:
if point.z > max_height:
z = max_height
else:
z = point.z
x = int(point.x - h.min[0])
y = int(point.y - h.min[1])
intensity = 255 - int(((z - height_offset) * depth_scale))
img.putpixel((x,y), (intensity,intensity,intensity))
i += 1
img.save(outfile)
def plotInternalConsistency(M, tick_labels, cmap=mpl.cm.bwr, second_labels=None):
norm = mpl.colors.Normalize(0,scoreatpercentile(M.flatten(), 95))
f=p.figure()
ax=f.add_subplot(111)
ax.matshow(M, cmap=cmap, norm=norm)
p.yticks(range(0,M.shape[0],15),tick_labels[::15])
ax.tick_params(labelsize=6)
# if second_labels is not None:
# ax_=ax.twinx()
# ax_.set_yticks(range(M.shape[0]))
# ax_.set_yticklabels(second_labels)
# ax_.tick_params(labelsize=4)
# ax_.set_yscale(ax.get_yscale())
p.show()
return
def feldmanRanking(protectedCandidates, nonProtectedCandidates, k,
dataSetName):
# ensure candidates are sorted by descending qualificiations
nonProtectedCandidates.sort(key=lambda candidate: candidate.learnedScores,
reverse=True)
nonProtectedQualifications = [
nonProtectedCandidates[i].learnedScores
for i in range(len(nonProtectedCandidates))
]
protectedCandidates.sort(key=lambda candidate: candidate.learnedScores,
reverse=True)
protectedQualifications = [
protectedCandidates[i].learnedScores
for i in range(len(protectedCandidates))
]
ranking = []
# create same distribution for protected and non-protected candidates
for i, candidate in enumerate(protectedCandidates):
if i >= k:
# only need to adapt the scores for protected candidates up to required length
# the rest will not be considered anyway
break
# find percentile of protected candidate
p = percentileofscore(protectedQualifications, candidate.learnedScores)
# find score of a non-protected in the same percentile
score = scoreatpercentile(nonProtectedQualifications, p)
candidate.qualification = score
ranking.append(candidate)
ranking += nonProtectedCandidates
# create a colorblind ranking
ranking.sort(key=lambda candidate: candidate.qualification, reverse=True)
rankingResultsPath = "FeldmanEtAl/" + dataSetName + "ranking.csv"
return ranking, rankingResultsPath
gene = affy2entrez[p].replace('"','')
if gene in genecols.keys():
genecols[gene].append(i)
else:
genecols[gene] = [i]
o.write(l[0]+','+l[1]+',')
for i, g in enumerate(genecols):
o.write(g)
if i < len(genecols)-1:
o.write(',')
else:
o.write('\n')
print 'Number of probes'
print len(probes)
i = 0
while True:
i += 1
l = f.readline()
if not l:
break
fields = l.strip(' \n').split()
a = array([float(x) for x in fields[2:]])
o.write(fields[0]+','+fields[1]+',')
for j, g in enumerate(genecols):
o.write(str(stats.scoreatpercentile(a[genecols[g]], 50)))
if j < len(genecols)-1:
o.write(',')
else:
o.write('\n')
def trimean(values):
return (stats.scoreatpercentile(values, 25) + 2.0*stats.scoreatpercentile(values, 50) + stats.scoreatpercentile(values, 75))/4.0
def trimean(values):
return (stats.scoreatpercentile(values, 25) +
2.0 * stats.scoreatpercentile(values, 50) +
stats.scoreatpercentile(values, 75)) / 4.0
rdat = RDATFile()
rdat.load(open(args.rdatdir+'/'+filename))
for cname in rdat.constructs:
construct = rdat.constructs[cname]
struct = SecondaryStructure(construct.structure)
frags = struct.explode()
for data in construct.data:
if (('mutation' not in data.annotations) or \
('mutation' in data.annotations and \
'WT' in data.annotations['mutation'])):
if 'modifier' in data.annotations:
if args.normalize:
normvals = normalize(data.values)
else:
normvals = data.values
iqr = scoreatpercentile(normvals, 75) - scoreatpercentile(normvals, 25)
for fragtype in frags:
db['all'].extend(normvals)
if data.errors:
db['all'].extend(data.errors)
dbidx['all'] = dict([((construct.name, construct.seqpos[i]), v) for i, v in enumerate(normvals)])
fraglist = frags[fragtype]
for frag in fraglist:
vals = []
valerrors = []
pos = []
for idx in frag:
try:
iddx = construct.seqpos.index(idx + construct.offset + 1)
if ('DMS' in data.annotations['modifier'] and construct.sequence[idx].upper() not in ['A', 'C']) or\
('CMCT' in data.annotations['modifier'] and construct.sequence[idx].upper() not in ['G', 'U']) or\
def plot_outlier_detection(df_floats: pd.DataFrame,
y_labels: np.ndarray,
clf,
clf_name: str = None,
scaler=None):
""" Return contourf plot of the anomaly detection model.
Plots contourf plot of decision scores marking area where observations would be considered inliers.
Parameters
----------
df_floats: pd.DataFrame with elements as floats.
y_labels: numpy array of the same length as df_floats that assigns 0/1 (inlier/outlier) to each observation
according to fitted model.
clf: fitted model.
clf_name: name of fitted model.
scaler: estimator that was used to change range of df_floats DataFrame
Returns
-------
Contourf plot.
"""
if df_floats.shape[1] > 2:
print('Plotting first two variables...')
elif df_floats.shape[1] < 2:
print('Sorry can not plot less than two variables.')
return
# predict raw anomaly score
y_scores = clf.decision_function(df_floats.iloc[:, [0, 1]]) * -1
# threshold value to consider a datapoint inlier or outlier
threshold = stats.scoreatpercentile(
y_scores, 100 * len(y_labels[y_labels == 1]) / len(y_labels))
# Specifies interval over which the np.linspace will be created
x_lim_min, x_lim_max = df_floats.iloc[:, 0].min(), df_floats.iloc[:,
0].max()
x_delta = 0.05 * (x_lim_max - x_lim_min)
y_lim_min, y_lim_max = df_floats.iloc[:, 1].min(), df_floats.iloc[:,
1].max()
y_delta = 0.05 * (y_lim_max - y_lim_min)
# coordinate array for vectorized evaluation of raw anomaly scores
# TODO: Coarser grid sometimes returns error when plotting (threshold out of [zz.min();zz.max()]).
xx, yy = np.meshgrid(
np.linspace(x_lim_min - x_delta, x_lim_max + x_delta, 100),
np.linspace(y_lim_min - y_delta, y_lim_max + y_delta, 100))
# decision function calculates the raw anomaly score for every point
zz = clf.decision_function(np.c_[xx.ravel(), yy.ravel()]) * -1
zz = zz.reshape(xx.shape)
# undo the scaling so the plot is in the same scale as input data
if scaler:
df_floats.iloc[:, [0, 1]] = scaler.inverse_transform(
df_floats.iloc[:, [0, 1]])
x_lim_min, x_lim_max = df_floats.iloc[:, 0].min(
), df_floats.iloc[:, 0].max()
x_delta = 0.05 * (x_lim_max - x_lim_min)
y_lim_min, y_lim_max = df_floats.iloc[:, 1].min(
), df_floats.iloc[:, 1].max()
y_delta = 0.05 * (y_lim_max - y_lim_min)
xx, yy = np.meshgrid(
np.linspace(x_lim_min - x_delta, x_lim_max + x_delta, 100),
np.linspace(y_lim_min - y_delta, y_lim_max + y_delta, 100))
# inliers_1 - inlier feature 1, inliers_2 - inlier feature 2
inliers_1 = (df_floats.iloc[:, 0][y_labels == 0]).values.reshape(-1, 1)
inliers_2 = (df_floats.iloc[:, 1][y_labels == 0]).values.reshape(-1, 1)
# outliers_1 - outlier feature 1, outliers_2 - outlier feature 2
outliers_1 = df_floats.iloc[:, 0][y_labels == 1].values.reshape(-1, 1)
outliers_2 = df_floats.iloc[:, 1][y_labels == 1].values.reshape(-1, 1)
plt.figure(figsize=(10, 10))
# fill blue map colormap from minimum anomaly score to threshold value
plt.contourf(xx,
yy,
zz,
levels=np.linspace(zz.min(), threshold, 50),
cmap=plt.cm.Blues_r)
plt.colorbar(
plt.contourf(xx,
yy,
zz,
levels=np.linspace(zz.min(), threshold, 50),
cmap=plt.cm.Blues_r))
# fill orange contour lines where range of anomaly score is from threshold to maximum anomaly score
plt.contourf(xx, yy, zz, levels=[threshold, zz.max()], colors='orange')
# draw red contour line where anomaly score is equal to threshold
a = plt.contour(xx, yy, zz, levels=[threshold], linewidths=2, colors='red')
# draw inliers as white dots
b = plt.scatter(inliers_1, inliers_2, c='white', s=20, edgecolor='k')
# draw outliers as black dots
c = plt.scatter(outliers_1, outliers_2, c='black', s=20, edgecolor='k')
plt.axis('tight')
# loc=2 is used for the top left corner
plt.legend([a.collections[0], b, c],
['learned decision function', 'inliers', 'outliers'],
prop=matplotlib.font_manager.FontProperties(size=20),
loc=2)
plt.xlim((x_lim_min - x_delta, x_lim_max + x_delta))
plt.ylim((y_lim_min - y_delta, y_lim_max + y_delta))
plt.xlabel(df_floats.columns[0])
plt.ylabel(df_floats.columns[1])
if clf_name:
plt.title(clf_name)
plt.show()
return
def variableSelector(predictorTrain, targetTrain, method, verbose=False):
varSelected = []
#SelectKBest
if (method == 'kb'):
selector = SelectKBest(mutual_info_classif,
k='all').fit(predictorTrain, targetTrain)
#selector = SelectKBest(mutual_info_classif).fit(predictNormWithPCA,target)
#selector = SelectPercentile(mutual_info_classif, percentile=100).fit(predictorTrain,targetTrain)
scores = selector.scores_
if (verbose):
print "Scores de selection"
print scores
threshold = stats.scoreatpercentile(scores, 33)
for i in range(len(scores)):
if (scores[i] > threshold):
varSelected.append(i)
if (verbose):
print scores[0]
if (verbose):
plt.hist(scores, bins=30) #, bins = range(1,len(scores)))
plt.title("Score de la selection de variables avec SelectKBest")
plt.ylabel('Nombre de variables')
plt.xlabel('Score')
plt.show()
#Random Forest
elif (method == 'rf'):
clf = RandomForestClassifier(n_estimators=20) # Random Forest
clf.fit(predictorTrain, targetTrain)
indexes = range(len(predictorTrain[0]))
if (verbose):
print "Features sorted by their score:"
print sorted(zip(
map(lambda x: round(x, 4), clf.feature_importances_), indexes),
reverse=True)
plt.hist(clf.feature_importances_,
bins=30) # , bins = range(1,len(scores)))
plt.title("Score de la selection de variables avec Random Forest")
plt.ylabel('Nombre de variables')
plt.xlabel('Score')
plt.show()
scores = defaultdict(list)
scoresTab = []
for train_idx, test_idx in ShuffleSplit(
n_splits=10, random_state=0,
test_size=.3).split(predictorTrain):
X_train, X_test = predictorTrain[train_idx], predictorTrain[
test_idx]
Y_train, Y_test = targetTrain[train_idx], targetTrain[test_idx]
clf.fit(X_train, Y_train)
acc = r2_score(Y_test, clf.predict(X_test))
for i in range(predictorTrain.shape[1]):
X_t = X_test.copy()
np.random.shuffle(X_t[:, i])
shuff_acc = r2_score(Y_test, clf.predict(X_t))
scores[indexes[i]].append((acc - shuff_acc) / acc)
scoresTab.append((acc - shuff_acc) / acc)
threshold = stats.scoreatpercentile(scoresTab, 25)
for feat, score in scores.items():
scorebis = np.mean(score)
if scorebis > threshold:
varSelected.append(feat)
varSelected = np.unique(varSelected)
return varSelected
def summary_string(data):
""" Returns the string representation of the data in `vector` """
summary = (np.nanmin(data), stats.scoreatpercentile(data,25), np.median(data), stats.scoreatpercentile(data,75), np.nanmax(data))
return "[%s, %s, %s, %s, %s]" % summary
def midhinge(values):
return (stats.scoreatpercentile(values, 25) + stats.scoreatpercentile(values, 75))/2.0
def _extract_one(self, point_cloud, neighborhood):
source_data = point_cloud[point][self.data_key]['data'][neighborhood]
return stats.scoreatpercentile(source_data, self.percentile)
def midhinge(values):
return (stats.scoreatpercentile(values, 25) +
stats.scoreatpercentile(values, 75)) / 2.0
rdat = RDATFile()
rdat.load(open(args.rdatdir + '/' + filename))
for cname in rdat.constructs:
construct = rdat.constructs[cname]
struct = SecondaryStructure(construct.structure)
frags = struct.explode()
for data in construct.data:
if (('mutation' not in data.annotations) or \
('mutation' in data.annotations and \
'WT' in data.annotations['mutation'])):
if 'modifier' in data.annotations:
if args.normalize:
normvals = normalize(data.values)
else:
normvals = data.values
iqr = scoreatpercentile(
normvals, 75) - scoreatpercentile(normvals, 25)
for fragtype in frags:
db['all'].extend(normvals)
if data.errors:
db['all'].extend(data.errors)
dbidx['all'] = dict([((construct.name, construct.seqpos[i]), v)
for i, v in enumerate(normvals)])
fraglist = frags[fragtype]
for frag in fraglist:
vals = []
valerrors = []
pos = []
for idx in frag:
try:
iddx = construct.seqpos.index(idx +
construct.offset + 1)