Question: * Retrain your model using 1 cycle scheduling and see if it improves training speed and model accuracy. K = keras.backend class ExponentialLearningRate ( keras
Retrain your model using cycle scheduling and see if it improves training speed and model accuracy.
K keras.backend
class ExponentialLearningRatekerascallbacks.Callback:
def initself factor:
self.factor factor
self.rates
self.losses
def onbatchendself batch, logs:
self.rates.appendKgetvalueselfmodel.optimizer.learningrate
self.losses.appendlogsloss
Ksetvalueselfmodel.optimizer.learningrate, self.model.optimizer.learningrate self.factor
def findlearningratemodel X y epochs batchsize minrate maxrate:
initweights model.getweights
iterations math.ceillenX batchsize epochs
factor npexpnplogmaxrate minrate iterations
initlr Kgetvaluemodeloptimizer.learningrate
Ksetvaluemodeloptimizer.learningrate, minrate
explr ExponentialLearningRatefactor
history model.fitX y epochsepochs, batchsizebatchsize,
callbacksexplr
Ksetvaluemodeloptimizer.learningrate, initlr
model.setweightsinitweights
return explrrates, explrlosses
def plotlrvslossrates losses:
pltplotrates losses
pltgcasetxscalelog
plthlinesminlosses minrates maxrates
pltaxisminrates maxrates minlosseslosses minlosses
pltxlabelLearning rate"
pltylabelLoss
class OneCycleSchedulerkerascallbacks.Callback:
def initself iterations, maxrate, startrateNone,
lastiterationsNone, lastrateNone:
self.iterations iterations
self.maxrate maxrate
self.startrate startrate or maxrate
self.lastiterations lastiterations or iterations
self.halfiteration iterations self.lastiterations
self.lastrate lastrate or self.startrate
self.iteration
def interpolateself iter iter rate rate:
return rate rateselfiteration iter
iter iter rate
def onbatchbeginself batch, logs:
if self.iteration self.halfiteration:
rate self.interpolate self.halfiteration, self.startrate, self.maxrate
elif self.iteration self.halfiteration:
rate self.interpolateselfhalfiteration, self.halfiteration,
self.maxrate, self.startrate
else:
rate self.interpolate self.halfiteration, self.iterations,
self.startrate, self.lastrate
self.iteration
Ksetvalueselfmodel.optimizer.learningrate, rate
import math
learningrate
decay e
batchsize
nstepsperepoch math.ceillenXtrain batchsize
epochs nparangenepochs
lrs learningrate decay epochs nstepsperepoch
pltplotepochs lrso
pltaxis nepochs
pltxlabelEpoch
pltylabelLearning Rate"
plttitlePower Scheduling", fontsize
pltgridTrue
pltshow is that correct code for the above question
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