Vector label construction in Mnist data. (#79)
Vector label construction in Mnist data. (#79)

* Vectorize label construction in Mnist data.

tensorflow/tfjs,tensorflow/tfjs,tensorflow/tfjs-node,tensorflow/tfjs,tensorflow/tfjs-node,tensorflow/tfjs,tensorflow/tfjs,tensorflow/tfjs-node,tensorflow/tfjs,tensorflow/tfjs-node,tensorflow/tfjs,tensorflow/tfjs-node,tensorflow/tfjs,tensorflow/tfjs