Add math function for sampling integers#5945

Merged

wanghaoshuang merged 4 commits intoPaddlePaddle:developfrom wanghaoshuang:sampler

Jan 22, 2018

+170

Commits on Nov 27, 2017

Add math function for sampling integers from:
wanghaoshuang
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Commits on Dec 7, 2017

Commits on Jan 19, 2018

Merge branch 'develop' of https://github.com/PaddlePaddle/Paddle into sampler
wanghaoshuang
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