| #------------------------------------------------------------- |
| # |
| # Licensed to the Apache Software Foundation (ASF) under one |
| # or more contributor license agreements. See the NOTICE file |
| # distributed with this work for additional information |
| # regarding copyright ownership. The ASF licenses this file |
| # to you under the Apache License, Version 2.0 (the |
| # "License"); you may not use this file except in compliance |
| # with the License. You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, |
| # software distributed under the License is distributed on an |
| # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| # KIND, either express or implied. See the License for the |
| # specific language governing permissions and limitations |
| # under the License. |
| # |
| #------------------------------------------------------------- |
| |
| # One-hot encodes a vector |
| |
| # INPUT PARAMETERS: |
| # -------------------------------------------------------------------------------------------- |
| # NAME TYPE DEFAULT MEANING |
| # -------------------------------------------------------------------------------------------- |
| # X matrix --- vector with N integer entries between 1 and numClasses |
| # numclasses int --- number of columns, must be >= largest value in X |
| |
| # Output: |
| # -------------------------------------------------------------------------------------------- |
| # NAME TYPE MEANING |
| # ------------------------------------------------------------------------------------------- |
| # Y matrix one-hot-encoded matrix with shape (N, numClasses) |
| # ------------------------------------------------------------------------------------------- |
| |
| m_toOneHot = function(matrix[double] X, integer numClasses) |
| return (matrix[double] Y) { |
| if(numClasses < max(X)) |
| stop("numClasses must be >= largest value in X to prevent cropping"); |
| Y = table(seq(1, nrow(X)), X, nrow(X), numClasses); |
| } |