| #------------------------------------------------------------- |
| # |
| # 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. |
| # |
| |
| # Returns Euclidian distance matrix (distances between N n-dimensional points) |
| |
| m_dist = function(Matrix[Double] X) return (Matrix[Double] Y) { |
| G = X %*% t(X); |
| I = matrix(1, rows = nrow(G), cols = ncol(G)); |
| Y = -2 * (G) + t(I %*% diag(diag(G))) + t(diag(diag(G)) %*% I); |
| Y = sqrt(Y); |
| Y = replace(target = Y, pattern=0/0, replacement = 0); |
| } |