def crossvalidate_run(train_dataset, test_set, labels, splits=10):
testaccuracy, trainaccuracy, trainaccuracy_last, test_cost, train_cost, times = [], [], [], [], [], [] # for saving results of different runs
"""function to use 'splits'-fold cross validation, writing results to CV_log.txt"""
basepath = config.logspath[:-1] + "_cv" + str(splits) + '/'
fold = 0
kf = KFold(n_splits=splits, shuffle=True) # initialize k-fold cross validation
if config.write_file or config.plot:
if not os.path.isdir(basepath):
os.makedirs(basepath) # make sure directory exists for writing the log file
cvlog = open(basepath + '/CV_log.txt', 'w+')
# get the data
if config.plot: # test set stays same, but train/val is different for every split
plotlib.plot_histogram(test_set.labels, 'Test data', basepath, 'test_histogram', labels)
# cross validation loop
for train_idx, val_idx in kf.split(train_dataset.data, train_dataset.labels):
# construct data set with train/val data for this "fold"
train_set = datahandler.make_dataset(train_dataset.data[train_idx], train_dataset.labels[train_idx])
val_set = datahandler.make_dataset(train_dataset.data[val_idx], train_dataset.labels[val_idx])
# set own path for each run
config.logspath = basepath + 'fold_' + str(fold) + '/'
config.disp_train = int(train_set.num_examples / (config.display_steps * config.batch_size)) # steps per epoch regardless batch size
# run optimization and evaluation procedure
testacc, trainacc, trainacc_last, duration, valacc = \
CNN_framework.run(config,
dataset=datahandler.make_datasets(train_set, val_set, test_set),
classlabels=labels)
# plot histograms
if config.plot:
plotlib.plot_histogram(train_set.labels, 'Training data', config.logspath, 'train_histogram',
labels)
plotlib.plot_histogram(val_set.labels, 'Validation data', config.logspath,
'validation_histogram',
labels)
testaccuracy.append(testacc)
trainaccuracy.append(trainacc)
trainaccuracy_last.append(trainacc_last)
times.append(duration)
print("test accuracy in fold %s: %s " % (fold, testacc))
print("train accuracy in fold %s: %s" % (fold, trainacc))
print("last train acc. in fold %s: %s" % (fold, trainacc_last))
fold += 1
mean_testacc = np.mean(testaccuracy)
if config.write_file:
cvlog.write("test accuracies: %s\n" % testaccuracy)
cvlog.write("train accuracies: %s\n" % trainaccuracy)
cvlog.write("last train acc: %s\n" % trainaccuracy_last)
cvlog.write("average test accuracy: %s" % mean_testacc)
cvlog.write("average training time: %s" % np.mean(times))
cvlog.close()
return mean_testacc
def datasetsize_inspectionrun(alltrain, test_set, labels, splits=10):
orig_path = config.logspath
# scale such that remaining _train_ set holds power of 2 data samples
sizes = (np.ceil(np.asarray([256, 512, 1024, 2048, 4096, 8192, 10000]) * splits / (splits - 1)))
sizes = [int(i) for i in sizes] # make them integers
i = 0
for size in sizes:
config.logspath = orig_path + 'tr_size' + str(sizes[i]) + '/'
traindata_trunc = alltrain.data[:size]
trainlabels_trunc = alltrain.labels[:size]
result = crossvalidate_run(datahandler.make_dataset(traindata_trunc, trainlabels_trunc), test_set, labels, splits)
i += 1
return result
def evaluateCNN(config):
# change logspath to initialLogpath/'eval_modelpath'_'test_set_path'
config.logspath = config.eval_modelpath[:-1] + '_' + config.test_set.split('/')[-2] + '/'
if not os.path.isdir(config.logspath) and (config.plot or config.write_file):
os.makedirs(config.logspath) # make sure directory exists for writing the file
if 'etrend' in config.eval_modelpath:
config.preprocessing = 'detrend'
elif 'FFT' in config.eval_modelpath:
config.preprocessing = 'fourier_channels'
elif 'STFT' in config.eval_modelpath:
config.preprocessing = 'stft'
# get data info
seq_length, n_channels, sensors = datahandler.read_infotxt(config.test_set)
testlabels = datahandler.read_file('_labels', config.test_set, file_format='csv')
testdata = datahandler.read_file('_data', config.test_set, file_format='csv')
if testlabels.ndim == 1:
testlabels, _ = datahandler.make_one_hot(testlabels)
# reduce channels if specified
if config.sel_sensors != sensors:
testdata, sensors, n_channels = datahandler.select_channels(testdata, sensors, seq_length, config.sel_sensors)
testdata, _, _ = datahandler.do_preprocessing(testdata, config.preprocessing, n_channels, seq_length)
# transform data with scaler
if config.preprocessing is 'fourier_samples':
toscale = 'samples'
else:
toscale = 'channels'
scaler = datahandler.load_scaler(config.eval_modelpath)
testdata = datahandler.do_scaling(testdata, scaler, n_channels, seq_length, toscale=toscale)
eval_data = datahandler.make_datasets(None, None, datahandler.make_dataset(testdata, testlabels))
subDirectories = next(os.walk(config.eval_modelpath))[1]
baselogspath = config.logspath
baseevalmodelpath = config.eval_modelpath
for subDirectory in subDirectories:
run_for_loop_subdirectory(config=config, subDirectory=subDirectory, baseevalmodelpath=baseevalmodelpath,
baselogspath=baselogspath, eval_data=eval_data, testlabels=testlabels)
def evaluateCNN(config):
# change logspath to initialLogpath/'eval_modelpath'_'test_set_path'
# config.logspath = config.logspath + config.eval_modelpath.split('/')[-2] + '_' + config.test_set.split('/')[-2] + '/'
config.logspath = config.eval_modelpath[:-1] + '_' + config.test_set.split(
'/')[-2] + '/'
if not os.path.isdir(config.logspath) and (config.plot
or config.write_file):
os.makedirs(
config.logspath) # make sure directory exists for writing the file
# TODO: preprocessing etc. aus dem Log-file des trainierten Systems auslesen
if 'etrend' in config.eval_modelpath:
config.preprocessing = 'detrend'
elif 'FFT' in config.eval_modelpath:
config.preprocessing = 'fourier_channels'
elif 'STFT' in config.eval_modelpath:
config.preprocessing = 'stft'
# get data info
seq_length, n_channels, sensors = datahandler.read_infotxt(config.test_set)
# try:
# testlabels = datahandler.read_file('_labels', config.test_set, file_format='npy')
# testdata = datahandler.read_file('_data', config.test_set, file_format='npy')
# except:
# print('npy format of data not found. Using csv')
testlabels = datahandler.read_file('labels',
config.test_set,
file_format='csv')
testdata = datahandler.read_file('dataset',
config.test_set,
file_format='csv')
try:
idx = datahandler.read_file('obsID',
config.test_set,
file_format='csv')
idx = idx.reshape(-1, 1)
except:
idx = np.arange(testdata.shape[0]).reshape(-1, 1)
if testlabels.ndim == 1:
testlabels, _ = datahandler.make_one_hot(testlabels)
# reduce channels if specified
if config.sel_sensors != sensors:
testdata, sensors, n_channels = datahandler.select_channels(
testdata, sensors, seq_length, config.sel_sensors)
testdata, _, _ = datahandler.do_preprocessing(testdata,
config.preprocessing,
n_channels, seq_length)
# transform data with scaler
if config.preprocessing is 'fourier_samples':
toscale = 'samples'
else:
toscale = 'channels'
scaler = datahandler.load_scaler(config.eval_modelpath)
testdata = datahandler.do_scaling(testdata,
scaler,
n_channels,
seq_length,
toscale=toscale)
eval_data = datahandler.make_datasets(
None, None, datahandler.make_dataset(testdata, testlabels, index=idx))
subDirectories = next(os.walk(config.eval_modelpath))[1]
baselogspath = config.logspath
baseevalmodelpath = config.eval_modelpath
for subDirectory in subDirectories:
run_for_loop_subdirectory(config=config,
subDirectory=subDirectory,
baseevalmodelpath=baseevalmodelpath,
baselogspath=baselogspath,
eval_data=eval_data,
testlabels=testlabels)
