# -*- coding: utf-8 -*- ''' Generate datasets for testing ''' # needed for python 3 compatibility from __future__ import absolute_import from datetime import datetime import numpy as np from numpy.random import rand import quantities as pq from neo.core import (AnalogSignal, Block, Epoch, Event, IrregularlySampledSignal, ChannelIndex, Segment, SpikeTrain, Unit, class_by_name) from neo.core.baseneo import _container_name TEST_ANNOTATIONS = [1, 0, 1.5, "this is a test", datetime.fromtimestamp(424242424), None] def generate_one_simple_block(block_name='block_0', nb_segment=3, supported_objects=[], **kws): if supported_objects and Block not in supported_objects: raise ValueError('Block must be in supported_objects') bl = Block() # name = block_name) objects = supported_objects if Segment in objects: for s in range(nb_segment): seg = generate_one_simple_segment(seg_name="seg" + str(s), supported_objects=objects, **kws) bl.segments.append(seg) #if RecordingChannel in objects: # populate_RecordingChannel(bl) bl.create_many_to_one_relationship() return bl def generate_one_simple_segment(seg_name='segment 0', supported_objects=[], nb_analogsignal=4, t_start=0.*pq.s, sampling_rate=10*pq.kHz, duration=6.*pq.s, nb_spiketrain=6, spikerate_range=[.5*pq.Hz, 12*pq.Hz], event_types={'stim': ['a', 'b', 'c', 'd'], 'enter_zone': ['one', 'two'], 'color': ['black', 'yellow', 'green'], }, event_size_range=[5, 20], epoch_types={'animal state': ['Sleep', 'Freeze', 'Escape'], 'light': ['dark', 'lighted'] }, epoch_duration_range=[.5, 3.], ): if supported_objects and Segment not in supported_objects: raise ValueError('Segment must be in supported_objects') seg = Segment(name=seg_name) if AnalogSignal in supported_objects: for a in range(nb_analogsignal): anasig = AnalogSignal(rand(int(sampling_rate * duration)), sampling_rate=sampling_rate, t_start=t_start, units=pq.mV, channel_index=a, name='sig %d for segment %s' % (a, seg.name)) seg.analogsignals.append(anasig) if SpikeTrain in supported_objects: for s in range(nb_spiketrain): spikerate = rand()*np.diff(spikerate_range) spikerate += spikerate_range[0].magnitude #spikedata = rand(int((spikerate*duration).simplified))*duration #sptr = SpikeTrain(spikedata, # t_start=t_start, t_stop=t_start+duration) # #, name = 'spiketrain %d'%s) spikes = rand(int((spikerate*duration).simplified)) spikes.sort() # spikes are supposed to be an ascending sequence sptr = SpikeTrain(spikes*duration, t_start=t_start, t_stop=t_start+duration) sptr.annotations['channel_index'] = s seg.spiketrains.append(sptr) if Event in supported_objects: for name, labels in event_types.items(): evt_size = rand()*np.diff(event_size_range) evt_size += event_size_range[0] evt_size = int(evt_size) labels = np.array(labels, dtype='S') labels = labels[(rand(evt_size)*len(labels)).astype('i')] evt = Event(times=rand(evt_size)*duration, labels=labels) seg.events.append(evt) if Epoch in supported_objects: for name, labels in epoch_types.items(): t = 0 times = [] durations = [] while t < duration: times.append(t) dur = rand()*np.diff(epoch_duration_range) dur += epoch_duration_range[0] durations.append(dur) t = t+dur labels = np.array(labels, dtype='S') labels = labels[(rand(len(times))*len(labels)).astype('i')] epc = Epoch(times=pq.Quantity(times, units=pq.s), durations=pq.Quantity([x[0] for x in durations], units=pq.s), labels=labels, ) seg.epochs.append(epc) # TODO : Spike, Event seg.create_many_to_one_relationship() return seg def generate_from_supported_objects(supported_objects): #~ create_many_to_one_relationship if not supported_objects: raise ValueError('No objects specified') objects = supported_objects if Block in supported_objects: higher = generate_one_simple_block(supported_objects=objects) # Chris we do not create RC and RCG if it is not in objects # there is a test in generate_one_simple_block so I removed #finalize_block(higher) elif Segment in objects: higher = generate_one_simple_segment(supported_objects=objects) else: #TODO return None higher.create_many_to_one_relationship() return higher def get_fake_value(name, datatype, dim=0, dtype='float', seed=None, units=None, obj=None, n=None, shape=None): """ Returns default value for a given attribute based on neo.core If seed is not None, use the seed to set the random number generator. """ if not obj: obj = 'TestObject' elif not hasattr(obj, 'lower'): obj = obj.__name__ if (name in ['name', 'file_origin', 'description'] and (datatype != str or dim)): raise ValueError('%s must be str, not a %sD %s' % (name, dim, datatype)) if name == 'file_origin': return 'test_file.txt' if name == 'name': return '%s%s' % (obj, get_fake_value('', datatype, seed=seed)) if name == 'description': return 'test %s %s' % (obj, get_fake_value('', datatype, seed=seed)) if seed is not None: np.random.seed(seed) if datatype == str: return str(np.random.randint(100000)) if datatype == int: return np.random.randint(100) if datatype == float: return 1000. * np.random.random() if datatype == datetime: return datetime.fromtimestamp(1000000000*np.random.random()) if (name in ['t_start', 't_stop', 'sampling_rate'] and (datatype != pq.Quantity or dim)): raise ValueError('%s must be a 0D Quantity, not a %sD %s' % (name, dim, datatype)) # only put array types below here if units is not None: pass elif name in ['t_start', 't_stop', 'time', 'times', 'duration', 'durations']: units = pq.millisecond elif name == 'sampling_rate': units = pq.Hz elif datatype == pq.Quantity: units = np.random.choice(['nA', 'mA', 'A', 'mV', 'V']) units = getattr(pq, units) if name == 'sampling_rate': data = np.array(10000.0) elif name == 't_start': data = np.array(0.0) elif name == 't_stop': data = np.array(1.0) elif n and name == 'channel_indexes': data = np.arange(n) elif n and name == 'channel_names': data = np.array(["ch%d" % i for i in range(n)]) elif n and obj == 'AnalogSignal': if name == 'signal': size = [] for _ in range(int(dim)): size.append(np.random.randint(5) + 1) size[1] = n data = np.random.random(size)*1000. else: size = [] for _ in range(int(dim)): if shape is None : if name == "times": size.append(5) else : size.append(np.random.randint(5) + 1) else: size.append(shape) data = np.random.random(size) if name not in ['time', 'times']: data *= 1000. if np.dtype(dtype) != np.float64: data = data.astype(dtype) if datatype == np.ndarray: return data if datatype == list: return data.tolist() if datatype == pq.Quantity: return data * units # set the units # we have gone through everything we know, so it must be something invalid raise ValueError('Unknown name/datatype combination %s %s' % (name, datatype)) def get_fake_values(cls, annotate=True, seed=None, n=None): """ Returns a dict containing the default values for all attribute for a class from neo.core. If seed is not None, use the seed to set the random number generator. The seed is incremented by 1 for each successive object. If annotate is True (default), also add annotations to the values. """ if hasattr(cls, 'lower'): # is this a test that cls is a string? better to use isinstance(cls, basestring), no? cls = class_by_name[cls] kwargs = {} # assign attributes for i, attr in enumerate(cls._necessary_attrs + cls._recommended_attrs): if seed is not None: iseed = seed + i else: iseed = None kwargs[attr[0]] = get_fake_value(*attr, seed=iseed, obj=cls, n=n) if 'waveforms' in kwargs : #everything here is to force the kwargs to have len(time) == kwargs["waveforms"].shape[0] if len(kwargs["times"]) != kwargs["waveforms"].shape[0] : if len(kwargs["times"]) < kwargs["waveforms"].shape[0] : dif = kwargs["waveforms"].shape[0] - len(kwargs["times"]) new_times =[] for i in kwargs["times"].magnitude : new_times.append(i) np.random.seed(0) new_times = np.concatenate([new_times, np.random.random(dif)]) kwargs["times"] = pq.Quantity(new_times, units=pq.ms) else : kwargs['times'] = kwargs['times'][:kwargs["waveforms"].shape[0]] if 'times' in kwargs and 'signal' in kwargs: kwargs['times'] = kwargs['times'][:len(kwargs['signal'])] kwargs['signal'] = kwargs['signal'][:len(kwargs['times'])] if annotate: kwargs.update(get_annotations()) kwargs['seed'] = seed return kwargs def get_annotations(): ''' Returns a dict containing the default values for annotations for a class from neo.core. ''' return dict([(str(i), ann) for i, ann in enumerate(TEST_ANNOTATIONS)]) def fake_neo(obj_type="Block", cascade=True, seed=None, n=1): ''' Create a fake NEO object of a given type. Follows one-to-many and many-to-many relationships if cascade. n (default=1) is the number of child objects of each type will be created. In cases like segment.spiketrains, there will be more than this number because there will be n for each unit, of which there will be n for each channelindex, of which there will be n. ''' if hasattr(obj_type, 'lower'): cls = class_by_name[obj_type] else: cls = obj_type obj_type = obj_type.__name__ kwargs = get_fake_values(obj_type, annotate=True, seed=seed, n=n) obj = cls(**kwargs) # if not cascading, we don't need to do any of the stuff after this if not cascade: return obj # this is used to signal other containers that they shouldn't duplicate # data if obj_type == 'Block': cascade = 'block' for i, childname in enumerate(getattr(obj, '_child_objects', [])): # we create a few of each class for j in range(n): if seed is not None: iseed = 10*seed+100*i+1000*j else: iseed = None child = fake_neo(obj_type=childname, cascade=cascade, seed=iseed, n=n) child.annotate(i=i, j=j) # if we are creating a block and this is the object's primary # parent, don't create the object, we will import it from secondary # containers later if (cascade == 'block' and len(child._parent_objects) > 0 and obj_type != child._parent_objects[-1]): continue getattr(obj, _container_name(childname)).append(child) # need to manually create 'implicit' connections if obj_type == 'Block': # connect data objects to segment for i, chx in enumerate(obj.channel_indexes): for k, sigarr in enumerate(chx.analogsignals): obj.segments[k].analogsignals.append(sigarr) for k, sigarr in enumerate(chx.irregularlysampledsignals): obj.segments[k].irregularlysampledsignals.append(sigarr) for j, unit in enumerate(chx.units): for k, train in enumerate(unit.spiketrains): obj.segments[k].spiketrains.append(train) #elif obj_type == 'ChannelIndex': # inds = [] # names = [] # chinds = np.array([unit.channel_indexes[0] for unit in obj.units]) # obj.indexes = np.array(inds, dtype='i') # obj.channel_names = np.array(names).astype('S') if hasattr(obj, 'create_many_to_one_relationship'): obj.create_many_to_one_relationship() return obj def clone_object(obj, n=None): ''' Generate a new object and new objects with the same rules as the original. ''' if hasattr(obj, '__iter__') and not hasattr(obj, 'ndim'): return [clone_object(iobj, n=n) for iobj in obj] cascade = hasattr(obj, 'children') and len(obj.children) if n is not None: pass elif cascade: n = min(len(getattr(obj, cont)) for cont in obj._child_containers) else: n = 0 seed = obj.annotations.get('seed', None) newobj = fake_neo(obj.__class__, cascade=cascade, seed=seed, n=n) if 'i' in obj.annotations: newobj.annotate(i=obj.annotations['i'], j=obj.annotations['j']) return newobj