| /* |
| * 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. |
| */ |
| |
| package org.apache.sysds.runtime.matrix.data; |
| |
| import org.apache.sysds.runtime.DMLRuntimeException; |
| import org.apache.sysds.runtime.util.NormalPRNGenerator; |
| import org.apache.sysds.runtime.util.PRNGenerator; |
| import org.apache.sysds.runtime.util.PoissonPRNGenerator; |
| import org.apache.sysds.runtime.util.UniformPRNGenerator; |
| |
| public class RandomMatrixGenerator { |
| |
| /** |
| * Types of Probability density functions |
| */ |
| enum PDF { |
| NORMAL, UNIFORM, POISSON |
| } |
| |
| PDF _pdf; |
| int _rows, _cols, _blocksize; |
| double _sparsity, _mean; |
| double _min, _max; |
| PRNGenerator _valuePRNG; |
| |
| public RandomMatrixGenerator() { |
| _pdf = PDF.UNIFORM; |
| _rows = _cols = _blocksize = -1; |
| _sparsity = 0.0; |
| _min = _max = Double.NaN; |
| _valuePRNG = null; |
| _mean = 1.0; |
| } |
| |
| /** |
| * Instantiates a Random number generator |
| * @param pdf probability density function |
| * @param r number of rows |
| * @param c number of columns |
| * @param blen rows/cols per block |
| * @param sp sparsity (0 = completely sparse, 1 = completely dense) |
| */ |
| public RandomMatrixGenerator(PDF pdf, int r, int c, int blen, double sp) { |
| this(pdf, r, c, blen, sp, Double.NaN, Double.NaN); |
| } |
| |
| /** |
| * Instantiates a Random number generator |
| * @param pdfStr probability density function |
| * @param r number of rows |
| * @param c number of columns |
| * @param blen rows/cols per block |
| * @param sp sparsity (0 = completely sparse, 1 = completely dense) |
| * @param min minimum of range of random numbers |
| * @param max maximum of range of random numbers |
| */ |
| public RandomMatrixGenerator(String pdfStr, int r, int c, int blen, double sp, double min, double max) { |
| init(PDF.valueOf(pdfStr.toUpperCase()), r, c, blen, sp, min, max); |
| } |
| |
| /** |
| * Instantiates a Random number generator |
| * @param pdf probability density function |
| * @param r number of rows |
| * @param c number of columns |
| * @param blen rows/cols per block |
| * @param sp sparsity (0 = completely sparse, 1 = completely dense) |
| * @param min minimum of range of random numbers |
| * @param max maximum of range of random numbers |
| */ |
| public RandomMatrixGenerator(PDF pdf, int r, int c, int blen, double sp, double min, double max) { |
| init(pdf, r, c, blen, sp, min, max); |
| } |
| |
| /** |
| * Initializes internal data structures. Called by Constructor |
| * @param pdf probability density function |
| * @param r number of rows |
| * @param c number of columns |
| * @param blen rows/cols per block |
| * @param sp sparsity (0 = completely sparse, 1 = completely dense) |
| * @param min minimum of range of random numbers |
| * @param max maximum of range of random numbers |
| */ |
| public void init(PDF pdf, int r, int c, int blen, double sp, double min, double max) { |
| _pdf = pdf; |
| _rows = r; |
| _cols = c; |
| _blocksize = blen; |
| _sparsity = sp; |
| _min = min; |
| _max = max; |
| |
| setupValuePRNG(); |
| } |
| |
| /** |
| * Instantiates a Random number generator with a specific poisson mean |
| * @param pdf probability density function |
| * @param r number of rows |
| * @param c number of columns |
| * @param blen rows/cols per block |
| * @param sp sparsity (0 = completely sparse, 1 = completely dense) |
| * @param min minimum of range of random numbers |
| * @param max maximum of range of random numbers |
| * @param mean the poisson mean |
| */ |
| public RandomMatrixGenerator(PDF pdf, int r, int c, int blen, double sp, double min, double max, double mean) { |
| init(pdf, r, c, blen, sp, min, max, mean); |
| } |
| |
| /** |
| * Instantiates a Random number generator with a specific poisson mean |
| * @param pdf probability density function |
| * @param r number of rows |
| * @param c number of columns |
| * @param blen rows/cols per block |
| * @param sp sparsity (0 = completely sparse, 1 = completely dense) |
| * @param min minimum of range of random numbers |
| * @param max maximum of range of random numbers |
| * @param mean the poisson mean |
| */ |
| public void init(PDF pdf, int r, int c, int blen, double sp, double min, double max, double mean) { |
| _pdf = pdf; |
| _rows = r; |
| _cols = c; |
| _blocksize = blen; |
| _sparsity = sp; |
| _min = min; |
| _max = max; |
| _mean = mean; |
| setupValuePRNG(); |
| } |
| |
| protected void setupValuePRNG() { |
| switch (_pdf) { |
| case NORMAL: |
| _valuePRNG = new NormalPRNGenerator(); |
| break; |
| case UNIFORM: |
| _valuePRNG = new UniformPRNGenerator(); |
| break; |
| case POISSON: |
| if(_mean <= 0) |
| throw new DMLRuntimeException("Invalid parameter (" + _mean + ") for Poisson distribution."); |
| _valuePRNG = new PoissonPRNGenerator(_mean); |
| break; |
| default: |
| throw new DMLRuntimeException("Unsupported probability density function"); |
| } |
| } |
| |
| @Override |
| public String toString() { |
| StringBuilder sb = new StringBuilder("PRNG["); |
| sb.append("pdf = "+_pdf.name()+", "); |
| sb.append("rows = "+_rows+", "); |
| sb.append("cols = "+_cols+", "); |
| sb.append("blen = "+_blocksize+", "); |
| sb.append("sparsity = "+_sparsity+", "); |
| sb.append("min = "+_min+", "); |
| sb.append("max = "+_max+"]"); |
| return sb.toString(); |
| } |
| } |