def learnNextLayer(self, params):
nLayers = len(self.ticas)
print 'StackedTica currently has %d layers, learning next' % nLayers
# TODO: only works for one extra layer!
Nw = 10
Nwshift = 5
Nsamples = 50000
#Nsamples = 1000; print 'HACK!'
# Get data and norm it
nextLayerData = cached(makeNewData, self.ticas[-1], self.l1whitener, seed = 0,
isColor = self.isColor, Nw = Nw, Nwshift = Nwshift,
Nsamples = Nsamples)
colNorms = sqrt(sum(nextLayerData**2, 0) + (1e-8))
nextLayerData = nextLayerData / colNorms
# Parameters
if params['dataCrop']:
print '\nWARNING: Cropping data from %d examples to only %d for debug\n' % (nextLayerData.shape[1], params['dataCrop'])
nextLayerData = nextLayerData[:,:params['dataCrop']]
if params['hiddenISize'] != params['hiddenJSize']:
raise Exception('hiddenISize and hiddenJSize must be the same')
hiddenLayerShape = (params['hiddenISize'], params['hiddenJSize'])
neighborhoodParams = ('gaussian', params['neighborhoodSize'], 0, 0)
if self.saveDir:
layerLogDir = os.path.join(self.saveDir, 'layer_%02d' % (nLayers+1))
os.makedirs(layerLogDir)
else:
layerLogDir = ''
# Print/plot data stats
if layerLogDir:
pseudoImgShape = (int(sqrt(nextLayerData.shape[0])), int(sqrt(nextLayerData.shape[0])))
plotImageData(nextLayerData, pseudoImgShape, layerLogDir, pc('data_raw'))
printDataStats(nextLayerData)
# Learn model
tica = TICA(nInputs = nextLayerData.shape[0],
hiddenLayerShape = hiddenLayerShape,
neighborhoodParams = neighborhoodParams,
lambd = params['lambd'],
epsilon = 1e-5,
saveDir = layerLogDir)
manuallySkipExpensivePart = False
if not manuallySkipExpensivePart:
beginTotalCost, beginPoolingCost, beginReconstructionCost, grad = tica.cost(tica.WW, nextLayerData)
tic = time.time()
tica.learn(nextLayerData, maxFun = params['maxFuncCalls'])
execTime = time.time() - tic
if layerLogDir:
saveToFile(os.path.join(layerLogDir, 'tica.pkl.gz'), tica) # save learned model
endTotalCost, endPoolingCost, endReconstructionCost, grad = tica.cost(tica.WW, nextLayerData)
print 'beginTotalCost, beginPoolingCost, beginReconstructionCost, endTotalCost, endPoolingCost, endReconstructionCost, execTime ='
print [beginTotalCost, beginPoolingCost, beginReconstructionCost, endTotalCost, endPoolingCost, endReconstructionCost, execTime]
else:
pdb.set_trace()
# Plot some results
#plotImageRicaWW(tica.WW, imgShape, saveDir, tileShape = hiddenLayerShape, prefix = pc('WW_iterFinal'))
if layerLogDir:
self.plotResults(layerLogDir, tica, nextLayerData, pseudoImgShape, hiddenLayerShape)
self.ticas.append(tica)
def runTest(saveDir, params):
import time, os, sys
from numpy import *
from GitResultsManager import GitResultsManager
#raise Exception('path is %s' % sys.path)
#raise Exception('version is %s' % sys.version_info)
#raise Exception('cwd is %s' % os.getcwd())
from tica import TICA
from util.misc import MakePc, Counter
from visualize import plotImageData, plotCov, plotImageRicaWW, plotRicaActivations, plotRicaReconstructions
from util.dataPrep import PCAWhiteningDataNormalizer, printDataStats
from util.dataLoaders import loadAtariData, loadUpsonData, loadUpsonData3, loadRandomData, saveToFile
#counter = Counter()
#pc = lambda st : makePc(st, counter = counter)
pc = MakePc(Counter())
#########################
# Parameters
#########################
hiddenISize = params['hiddenISize']
hiddenJSize = params['hiddenJSize']
neighborhoodParams = ('gaussian', params['neighborhoodSize'], 0, 0)
lambd = params['lambd']
epsilon = 1e-5
maxFuncCalls = params['maxFuncCalls']
randSeed = params['randSeed']
whiten = params['whiten']
dataCrop = params['dataCrop']
dataLoader = locals().get(
params['dataLoader']) # Convert string to actual function
dataPath = params['dataPath']
imgShape = params['imgShape']
hiddenLayerShape = (hiddenISize, hiddenJSize)
#########################
# Data
#########################
# Load data
#data = loadAtariData('../data/atari/mspacman_train_15_50000_3c.pkl.gz'); imgShape = (15,15,3)
#data = loadAtariData('../data/atari/space_invaders_train_15_50000_3c.pkl.gz'); imgShape = (15,15,3)
loaded = dataLoader(dataPath)
if type(loaded) is tuple:
data, labels, labelStrings = loaded
print 'Data has labels:', labelStrings
else:
data = loaded
labels, labelStrings = None, None
print 'Data does not have labels.'
if dataCrop:
print '\nWARNING: Cropping data from %d examples to only %d for debug\n' % (
data.shape[1], dataCrop)
data = data[:, :dataCrop]
nInputs = data.shape[0]
isColor = len(imgShape) > 2
print '\nParameters:'
for key in [
'nInputs', 'hiddenISize', 'hiddenJSize', 'neighborhoodParams',
'lambd', 'epsilon', 'maxFuncCalls', 'randSeed', 'dataCrop',
'dataLoader', 'dataPath', 'imgShape', 'whiten'
]:
print ' %20s: %s' % (key, locals()[key])
print
skipVis = True
if whiten:
if not skipVis:
# Visualize before prep
plotImageData(data, imgShape, saveDir, pc('data_raw'))
plotCov(data, saveDir, pc('data_raw'))
printDataStats(data)
# Whiten with PCA
whiteningStage = PCAWhiteningDataNormalizer(data, saveDir=saveDir)
dataWhite, junk = whiteningStage.raw2normalized(data, unitNorm=True)
#dataOrig = whiteningStage.normalized2raw(dataWhite)
dataOrig = data
data = dataWhite
if not skipVis:
# Visualize after prep
plotImageData(data, imgShape, saveDir, pc('data_white'))
plotCov(data, saveDir, pc('data_white'))
printDataStats(data)
#########################
# Model
#########################
random.seed(randSeed)
tica = TICA(nInputs=prod(imgShape),
hiddenLayerShape=hiddenLayerShape,
neighborhoodParams=neighborhoodParams,
lambd=lambd,
epsilon=epsilon,
saveDir=saveDir)
beginTotalCost, beginPoolingCost, beginReconstructionCost, grad = tica.cost(
tica.WW, data)
tic = time.time()
tica.learn(data, maxFun=maxFuncCalls)
execTime = time.time() - tic
saveToFile(os.path.join(saveDir, 'tica.pkl.gz'),
tica) # save learned model
plotImageRicaWW(tica.WW,
imgShape,
saveDir,
tileShape=hiddenLayerShape,
prefix=pc('WW_iterFinal'))
plotRicaActivations(tica.WW,
data,
saveDir,
prefix=pc('activations_iterFinal'))
unwhitener = whiteningStage.normalized2raw if whiten else None
plotRicaReconstructions(tica,
data,
imgShape,
saveDir,
unwhitener=unwhitener,
tileShape=hiddenLayerShape,
prefix=pc('recon_iterFinal'),
number=20)
endTotalCost, endPoolingCost, endReconstructionCost, grad = tica.cost(
tica.WW, data)
print 'beginTotalCost, beginPoolingCost, beginReconstructionCost, endTotalCost, endPoolingCost, endReconstructionCost, execTime ='
print[
beginTotalCost, beginPoolingCost, beginReconstructionCost,
endTotalCost, endPoolingCost, endReconstructionCost, execTime
]
results = {
'beginTotalCost': beginTotalCost,
'beginPoolingCost': beginPoolingCost,
'beginReconstructionCost': beginReconstructionCost,
'endTotalCost': endTotalCost,
'endPoolingCost': endPoolingCost,
'endReconstructionCost': endReconstructionCost,
'execTime': execTime
}
# Save locally just in case of exception in main program
myResults = {'params': params, 'results': results}
saveToFile(os.path.join(saveDir, 'myresults.pkl.gz'), myResults)
return results