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added max computation time option #6

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added max computation time option #6

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5 changes: 4 additions & 1 deletion lib/nn.js
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Original file line number Diff line number Diff line change
Expand Up @@ -6,6 +6,8 @@ var DEFAULT_OPTS = {
layers: [ 3 ],
// maximum training epochs to perform on the training data
iterations: 20000,
// maximum execution time, in seconds
time: Infinity,
// minimum acceptable error threshold
errorThresh: 0.0005,
// activation function ('logistic' and 'hyperbolic' supported)
Expand Down Expand Up @@ -69,8 +71,9 @@ NN.prototype.train = function (trainingData) {
var iterations = this.opts.iterations
var totalIterations = 0
var mse = 1
var startTime = new Date()

while (totalIterations++ < iterations && mse > this.opts.errorThresh) {
while (totalIterations++ < iterations && mse > this.opts.errorThresh && (new Date() - startTime)/1000 < this.opts.time) {

// run through the training data
trainingData.forEach(function (trainingEntry, index) {
Expand Down