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EarlyStop.lua
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EarlyStop.lua
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require 'paths'
local EarlyStop = torch.class('EarlyStop')
function EarlyStop:__init(allowedBadIters, maxIterations)
self.allowedBadIters = allowedBadIters or 5
self.maxIterations = maxIterations or -1
self.iteration = 0
self.bestIteration = 0
self.badStreak = 0
self.stopped = false
end
function EarlyStop:update(currentError)
self.iteration = self.iteration + 1
if (self.iteration == 1 or currentError < self.lowestError) then
self.badStreak = 0
self.lowestError = currentError
self.bestIteration = self.iteration
else
self.badStreak = self.badStreak + 1
end
self.lastError = currentError
if (self.badStreak >= self.allowedBadIters) then
self.stopped = true --stop
else
self.stopped = false --continue
end
if self.iteration == self.maxIterations then
self.stopped = true
end
return self.stopped
end
function EarlyStop:reset()
self.badStreak = 0
self.iteration = 0
self.stopped = false
end
function EarlyStop:stop()
return self.stopped
end
function EarlyStop:lowest()
return self.lowestError, self.bestIteration
end