| #------------------------------------------------------------- |
| # |
| # 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. |
| # |
| #------------------------------------------------------------- |
| |
| args <- commandArgs(TRUE) |
| options(digits=22) |
| library("Matrix") |
| library("matrixStats") |
| |
| X <- as.matrix(readMM(paste(args[1], "X.mtx", sep=""))) |
| rowVariances <- rowVars(X) |
| |
| # R outputs the variance of a single number as NA, whereas a more |
| # appropriate value would be 0, so replace all NAs with zeros. |
| # This is useful in the case of rowVars of a column vector. |
| rowVariances[is.na(rowVariances)] <- 0 |
| |
| writeMM(as(rowVariances, "CsparseMatrix"), paste(args[2], "rowVariances", sep="")); |
