| #------------------------------------------------------------- |
| # |
| # 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. |
| # |
| #------------------------------------------------------------- |
| |
| X = read($1); |
| W = read($2); |
| H = read($3); |
| |
| k = $4; |
| eps = $5; |
| max_iter = $6; |
| iter = 1; |
| |
| while( iter < max_iter ) { |
| H = (H*(t(W)%*%(X/(W%*%H+eps)))) / t(colSums(W)); |
| W = (W*((X/(W%*%H+eps))%*%t(H))) / t(rowSums(H)); |
| obj = sum(W%*%H) - sum(X*log(W%*%H+eps)); |
| print("iter=" + iter + " obj=" + obj); |
| iter = iter + 1; |
| } |
| |
| write(W, $7); |
| write(H, $8); |