code: public SDVariable oneHot(String name, SDVariable indices, int depth, int axis, double on, double off) {
          return oneHot(name, indices, depth, axis, on, off, OneHot.DEFAULT_DTYPE);
      }
docs: Convert the array to a one-hot array with walues {@code on} and {@code off} for each entry<br>
  If input has shape [ a, ..., n] then output has shape [ a, ..., n, depth],
  with {@code out[i, ..., j, in[i,...,j]] = on} with other values being set to {@code off}
  
  @param name    Output variable name
  @param indices Indices - value 0 to depth-1
  @param depth   Number of classes
  @return Output variable