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A fast and easy to use dense and sparse matrix linear algebra library written in Java.
/*
* Copyright (c) 2009-2017, Peter Abeles. All Rights Reserved.
*
* This file is part of Efficient Java Matrix Library (EJML).
*
* Licensed 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.ejml.ops;
import org.ejml.data.*;
/**
* Functions for converting between matrix types. Both matrices must be the same size and their values will
* be copied.
*
* @author Peter Abeles
*/
public class ConvertFMatrixStruct {
/**
* Generic, but slow, conversion function.
*
* @param input Input matrix.
* @param output Output matrix.
*/
public static void convert(FMatrix input , FMatrix output ) {
if( input.getNumRows() != output.getNumRows() )
throw new IllegalArgumentException("Number of rows do not match");
if( input.getNumCols() != output.getNumCols() )
throw new IllegalArgumentException("Number of columns do not match");
for( int i = 0; i < input.getNumRows(); i++ ) {
for( int j = 0; j < input.getNumCols(); j++ ) {
output.unsafe_set(i,j,input.unsafe_get(i,j));
}
}
}
/**
* Converts {@link FMatrix2x2} into {@link FMatrixRMaj}.
*
* @param input Input matrix.
* @param output Output matrix. If null a new matrix will be declared.
* @return Converted matrix.
*/
public static FMatrixRMaj convert(FMatrix2x2 input , FMatrixRMaj output ) {
if( output == null)
output = new FMatrixRMaj(2,2);
if( input.getNumRows() != output.getNumRows() )
throw new IllegalArgumentException("Number of rows do not match");
if( input.getNumCols() != output.getNumCols() )
throw new IllegalArgumentException("Number of columns do not match");
output.data[0] = input.a11;
output.data[1] = input.a12;
output.data[2] = input.a21;
output.data[3] = input.a22;
return output;
}
/**
* Converts {@link FMatrix3x3} into {@link FMatrixRMaj}.
*
* @param input Input matrix.
* @param output Output matrix. If null a new matrix will be declared.
* @return Converted matrix.
*/
public static FMatrixRMaj convert(FMatrix3x3 input , FMatrixRMaj output ) {
if( output == null)
output = new FMatrixRMaj(3,3);
if( input.getNumRows() != output.getNumRows() )
throw new IllegalArgumentException("Number of rows do not match");
if( input.getNumCols() != output.getNumCols() )
throw new IllegalArgumentException("Number of columns do not match");
output.data[0] = input.a11;
output.data[1] = input.a12;
output.data[2] = input.a13;
output.data[3] = input.a21;
output.data[4] = input.a22;
output.data[5] = input.a23;
output.data[6] = input.a31;
output.data[7] = input.a32;
output.data[8] = input.a33;
return output;
}
/**
* Converts {@link FMatrix4x4} into {@link FMatrixRMaj}.
*
* @param input Input matrix.
* @param output Output matrix. If null a new matrix will be declared.
* @return Converted matrix.
*/
public static FMatrixRMaj convert(FMatrix4x4 input , FMatrixRMaj output ) {
if( output == null)
output = new FMatrixRMaj(4,4);
if( input.getNumRows() != output.getNumRows() )
throw new IllegalArgumentException("Number of rows do not match");
if( input.getNumCols() != output.getNumCols() )
throw new IllegalArgumentException("Number of columns do not match");
output.data[0] = input.a11;
output.data[1] = input.a12;
output.data[2] = input.a13;
output.data[3] = input.a14;
output.data[4] = input.a21;
output.data[5] = input.a22;
output.data[6] = input.a23;
output.data[7] = input.a24;
output.data[8] = input.a31;
output.data[9] = input.a32;
output.data[10] = input.a33;
output.data[11] = input.a34;
output.data[12] = input.a41;
output.data[13] = input.a42;
output.data[14] = input.a43;
output.data[15] = input.a44;
return output;
}
/**
* Converts {@link FMatrix5x5} into {@link FMatrixRMaj}.
*
* @param input Input matrix.
* @param output Output matrix. If null a new matrix will be declared.
* @return Converted matrix.
*/
public static FMatrixRMaj convert(FMatrix5x5 input , FMatrixRMaj output ) {
if( output == null)
output = new FMatrixRMaj(5,5);
if( input.getNumRows() != output.getNumRows() )
throw new IllegalArgumentException("Number of rows do not match");
if( input.getNumCols() != output.getNumCols() )
throw new IllegalArgumentException("Number of columns do not match");
output.data[0] = input.a11;
output.data[1] = input.a12;
output.data[2] = input.a13;
output.data[3] = input.a14;
output.data[4] = input.a15;
output.data[5] = input.a21;
output.data[6] = input.a22;
output.data[7] = input.a23;
output.data[8] = input.a24;
output.data[9] = input.a25;
output.data[10] = input.a31;
output.data[11] = input.a32;
output.data[12] = input.a33;
output.data[13] = input.a34;
output.data[14] = input.a35;
output.data[15] = input.a41;
output.data[16] = input.a42;
output.data[17] = input.a43;
output.data[18] = input.a44;
output.data[19] = input.a45;
output.data[20] = input.a51;
output.data[21] = input.a52;
output.data[22] = input.a53;
output.data[23] = input.a54;
output.data[24] = input.a55;
return output;
}
/**
* Converts {@link FMatrix6x6} into {@link FMatrixRMaj}.
*
* @param input Input matrix.
* @param output Output matrix. If null a new matrix will be declared.
* @return Converted matrix.
*/
public static FMatrixRMaj convert(FMatrix6x6 input , FMatrixRMaj output ) {
if( output == null)
output = new FMatrixRMaj(6,6);
if( input.getNumRows() != output.getNumRows() )
throw new IllegalArgumentException("Number of rows do not match");
if( input.getNumCols() != output.getNumCols() )
throw new IllegalArgumentException("Number of columns do not match");
output.data[0] = input.a11;
output.data[1] = input.a12;
output.data[2] = input.a13;
output.data[3] = input.a14;
output.data[4] = input.a15;
output.data[5] = input.a16;
output.data[6] = input.a21;
output.data[7] = input.a22;
output.data[8] = input.a23;
output.data[9] = input.a24;
output.data[10] = input.a25;
output.data[11] = input.a26;
output.data[12] = input.a31;
output.data[13] = input.a32;
output.data[14] = input.a33;
output.data[15] = input.a34;
output.data[16] = input.a35;
output.data[17] = input.a36;
output.data[18] = input.a41;
output.data[19] = input.a42;
output.data[20] = input.a43;
output.data[21] = input.a44;
output.data[22] = input.a45;
output.data[23] = input.a46;
output.data[24] = input.a51;
output.data[25] = input.a52;
output.data[26] = input.a53;
output.data[27] = input.a54;
output.data[28] = input.a55;
output.data[29] = input.a56;
output.data[30] = input.a61;
output.data[31] = input.a62;
output.data[32] = input.a63;
output.data[33] = input.a64;
output.data[34] = input.a65;
output.data[35] = input.a66;
return output;
}
/**
* Converts {@link FMatrixRMaj} into {@link FMatrix2x2}
*
* @param input Input matrix.
* @param output Output matrix. If null a new matrix will be declared.
* @return Converted matrix.
*/
public static FMatrix2x2 convert(FMatrixRMaj input , FMatrix2x2 output ) {
if( output == null)
output = new FMatrix2x2();
if( input.getNumRows() != output.getNumRows() )
throw new IllegalArgumentException("Number of rows do not match");
if( input.getNumCols() != output.getNumCols() )
throw new IllegalArgumentException("Number of columns do not match");
output.a11 = input.data[0];
output.a12 = input.data[1];
output.a21 = input.data[2];
output.a22 = input.data[3];
return output;
}
/**
* Converts {@link FMatrixRMaj} into {@link FMatrix3x3}
*
* @param input Input matrix.
* @param output Output matrix. If null a new matrix will be declared.
* @return Converted matrix.
*/
public static FMatrix3x3 convert(FMatrixRMaj input , FMatrix3x3 output ) {
if( output == null)
output = new FMatrix3x3();
if( input.getNumRows() != output.getNumRows() )
throw new IllegalArgumentException("Number of rows do not match");
if( input.getNumCols() != output.getNumCols() )
throw new IllegalArgumentException("Number of columns do not match");
output.a11 = input.data[0];
output.a12 = input.data[1];
output.a13 = input.data[2];
output.a21 = input.data[3];
output.a22 = input.data[4];
output.a23 = input.data[5];
output.a31 = input.data[6];
output.a32 = input.data[7];
output.a33 = input.data[8];
return output;
}
/**
* Converts {@link FMatrixRMaj} into {@link FMatrix4x4}
*
* @param input Input matrix.
* @param output Output matrix. If null a new matrix will be declared.
* @return Converted matrix.
*/
public static FMatrix4x4 convert(FMatrixRMaj input , FMatrix4x4 output ) {
if( output == null)
output = new FMatrix4x4();
if( input.getNumRows() != output.getNumRows() )
throw new IllegalArgumentException("Number of rows do not match");
if( input.getNumCols() != output.getNumCols() )
throw new IllegalArgumentException("Number of columns do not match");
output.a11 = input.data[0];
output.a12 = input.data[1];
output.a13 = input.data[2];
output.a14 = input.data[3];
output.a21 = input.data[4];
output.a22 = input.data[5];
output.a23 = input.data[6];
output.a24 = input.data[7];
output.a31 = input.data[8];
output.a32 = input.data[9];
output.a33 = input.data[10];
output.a34 = input.data[11];
output.a41 = input.data[12];
output.a42 = input.data[13];
output.a43 = input.data[14];
output.a44 = input.data[15];
return output;
}
/**
* Converts {@link FMatrixRMaj} into {@link FMatrix5x5}
*
* @param input Input matrix.
* @param output Output matrix. If null a new matrix will be declared.
* @return Converted matrix.
*/
public static FMatrix5x5 convert(FMatrixRMaj input , FMatrix5x5 output ) {
if( output == null)
output = new FMatrix5x5();
if( input.getNumRows() != output.getNumRows() )
throw new IllegalArgumentException("Number of rows do not match");
if( input.getNumCols() != output.getNumCols() )
throw new IllegalArgumentException("Number of columns do not match");
output.a11 = input.data[0];
output.a12 = input.data[1];
output.a13 = input.data[2];
output.a14 = input.data[3];
output.a15 = input.data[4];
output.a21 = input.data[5];
output.a22 = input.data[6];
output.a23 = input.data[7];
output.a24 = input.data[8];
output.a25 = input.data[9];
output.a31 = input.data[10];
output.a32 = input.data[11];
output.a33 = input.data[12];
output.a34 = input.data[13];
output.a35 = input.data[14];
output.a41 = input.data[15];
output.a42 = input.data[16];
output.a43 = input.data[17];
output.a44 = input.data[18];
output.a45 = input.data[19];
output.a51 = input.data[20];
output.a52 = input.data[21];
output.a53 = input.data[22];
output.a54 = input.data[23];
output.a55 = input.data[24];
return output;
}
/**
* Converts {@link FMatrixRMaj} into {@link FMatrix6x6}
*
* @param input Input matrix.
* @param output Output matrix. If null a new matrix will be declared.
* @return Converted matrix.
*/
public static FMatrix6x6 convert(FMatrixRMaj input , FMatrix6x6 output ) {
if( output == null)
output = new FMatrix6x6();
if( input.getNumRows() != output.getNumRows() )
throw new IllegalArgumentException("Number of rows do not match");
if( input.getNumCols() != output.getNumCols() )
throw new IllegalArgumentException("Number of columns do not match");
output.a11 = input.data[0];
output.a12 = input.data[1];
output.a13 = input.data[2];
output.a14 = input.data[3];
output.a15 = input.data[4];
output.a16 = input.data[5];
output.a21 = input.data[6];
output.a22 = input.data[7];
output.a23 = input.data[8];
output.a24 = input.data[9];
output.a25 = input.data[10];
output.a26 = input.data[11];
output.a31 = input.data[12];
output.a32 = input.data[13];
output.a33 = input.data[14];
output.a34 = input.data[15];
output.a35 = input.data[16];
output.a36 = input.data[17];
output.a41 = input.data[18];
output.a42 = input.data[19];
output.a43 = input.data[20];
output.a44 = input.data[21];
output.a45 = input.data[22];
output.a46 = input.data[23];
output.a51 = input.data[24];
output.a52 = input.data[25];
output.a53 = input.data[26];
output.a54 = input.data[27];
output.a55 = input.data[28];
output.a56 = input.data[29];
output.a61 = input.data[30];
output.a62 = input.data[31];
output.a63 = input.data[32];
output.a64 = input.data[33];
output.a65 = input.data[34];
output.a66 = input.data[35];
return output;
}
/**
* Converts {@link FMatrix2} into {@link FMatrixRMaj}.
*
* @param input Input matrix.
* @param output Output matrix. If null a new matrix will be declared.
* @return Converted matrix.
*/
public static FMatrixRMaj convert(FMatrix2 input , FMatrixRMaj output ) {
if( output == null)
output = new FMatrixRMaj(2,1);
if( output.getNumRows() != 1 && output.getNumCols() != 1 )
throw new IllegalArgumentException("One row or column must have a length of 1 for it to be a vector");
int length = Math.max(output.getNumRows(),output.getNumCols());
if( length != 2 )
throw new IllegalArgumentException("Length of input vector is not 2. It is "+length);
output.data[0] = input.a1;
output.data[1] = input.a2;
return output;
}
/**
* Converts {@link FMatrix3} into {@link FMatrixRMaj}.
*
* @param input Input matrix.
* @param output Output matrix. If null a new matrix will be declared.
* @return Converted matrix.
*/
public static FMatrixRMaj convert(FMatrix3 input , FMatrixRMaj output ) {
if( output == null)
output = new FMatrixRMaj(3,1);
if( output.getNumRows() != 1 && output.getNumCols() != 1 )
throw new IllegalArgumentException("One row or column must have a length of 1 for it to be a vector");
int length = Math.max(output.getNumRows(),output.getNumCols());
if( length != 3 )
throw new IllegalArgumentException("Length of input vector is not 3. It is "+length);
output.data[0] = input.a1;
output.data[1] = input.a2;
output.data[2] = input.a3;
return output;
}
/**
* Converts {@link FMatrix4} into {@link FMatrixRMaj}.
*
* @param input Input matrix.
* @param output Output matrix. If null a new matrix will be declared.
* @return Converted matrix.
*/
public static FMatrixRMaj convert(FMatrix4 input , FMatrixRMaj output ) {
if( output == null)
output = new FMatrixRMaj(4,1);
if( output.getNumRows() != 1 && output.getNumCols() != 1 )
throw new IllegalArgumentException("One row or column must have a length of 1 for it to be a vector");
int length = Math.max(output.getNumRows(),output.getNumCols());
if( length != 4 )
throw new IllegalArgumentException("Length of input vector is not 4. It is "+length);
output.data[0] = input.a1;
output.data[1] = input.a2;
output.data[2] = input.a3;
output.data[3] = input.a4;
return output;
}
/**
* Converts {@link FMatrix5} into {@link FMatrixRMaj}.
*
* @param input Input matrix.
* @param output Output matrix. If null a new matrix will be declared.
* @return Converted matrix.
*/
public static FMatrixRMaj convert(FMatrix5 input , FMatrixRMaj output ) {
if( output == null)
output = new FMatrixRMaj(5,1);
if( output.getNumRows() != 1 && output.getNumCols() != 1 )
throw new IllegalArgumentException("One row or column must have a length of 1 for it to be a vector");
int length = Math.max(output.getNumRows(),output.getNumCols());
if( length != 5 )
throw new IllegalArgumentException("Length of input vector is not 5. It is "+length);
output.data[0] = input.a1;
output.data[1] = input.a2;
output.data[2] = input.a3;
output.data[3] = input.a4;
output.data[4] = input.a5;
return output;
}
/**
* Converts {@link FMatrix6} into {@link FMatrixRMaj}.
*
* @param input Input matrix.
* @param output Output matrix. If null a new matrix will be declared.
* @return Converted matrix.
*/
public static FMatrixRMaj convert(FMatrix6 input , FMatrixRMaj output ) {
if( output == null)
output = new FMatrixRMaj(6,1);
if( output.getNumRows() != 1 && output.getNumCols() != 1 )
throw new IllegalArgumentException("One row or column must have a length of 1 for it to be a vector");
int length = Math.max(output.getNumRows(),output.getNumCols());
if( length != 6 )
throw new IllegalArgumentException("Length of input vector is not 6. It is "+length);
output.data[0] = input.a1;
output.data[1] = input.a2;
output.data[2] = input.a3;
output.data[3] = input.a4;
output.data[4] = input.a5;
output.data[5] = input.a6;
return output;
}
/**
* Converts {@link FMatrixRMaj} into {@link FMatrix2}
*
* @param input Input matrix.
* @param output Output matrix. If null a new matrix will be declared.
* @return Converted matrix.
*/
public static FMatrix2 convert(FMatrixRMaj input , FMatrix2 output ) {
if( output == null)
output = new FMatrix2();
if( input.getNumRows() != 1 && input.getNumCols() != 1 )
throw new IllegalArgumentException("One row or column must have a length of 1 for it to be a vector");
int length = Math.max(input.getNumRows(),input.getNumCols());
if( length != 2 )
throw new IllegalArgumentException("Length of input vector is not 2. It is "+length);
output.a1 = input.data[0];
output.a2 = input.data[1];
return output;
}
/**
* Converts {@link FMatrixRMaj} into {@link FMatrix3}
*
* @param input Input matrix.
* @param output Output matrix. If null a new matrix will be declared.
* @return Converted matrix.
*/
public static FMatrix3 convert(FMatrixRMaj input , FMatrix3 output ) {
if( output == null)
output = new FMatrix3();
if( input.getNumRows() != 1 && input.getNumCols() != 1 )
throw new IllegalArgumentException("One row or column must have a length of 1 for it to be a vector");
int length = Math.max(input.getNumRows(),input.getNumCols());
if( length != 3 )
throw new IllegalArgumentException("Length of input vector is not 3. It is "+length);
output.a1 = input.data[0];
output.a2 = input.data[1];
output.a3 = input.data[2];
return output;
}
/**
* Converts {@link FMatrixRMaj} into {@link FMatrix4}
*
* @param input Input matrix.
* @param output Output matrix. If null a new matrix will be declared.
* @return Converted matrix.
*/
public static FMatrix4 convert(FMatrixRMaj input , FMatrix4 output ) {
if( output == null)
output = new FMatrix4();
if( input.getNumRows() != 1 && input.getNumCols() != 1 )
throw new IllegalArgumentException("One row or column must have a length of 1 for it to be a vector");
int length = Math.max(input.getNumRows(),input.getNumCols());
if( length != 4 )
throw new IllegalArgumentException("Length of input vector is not 4. It is "+length);
output.a1 = input.data[0];
output.a2 = input.data[1];
output.a3 = input.data[2];
output.a4 = input.data[3];
return output;
}
/**
* Converts {@link FMatrixRMaj} into {@link FMatrix5}
*
* @param input Input matrix.
* @param output Output matrix. If null a new matrix will be declared.
* @return Converted matrix.
*/
public static FMatrix5 convert(FMatrixRMaj input , FMatrix5 output ) {
if( output == null)
output = new FMatrix5();
if( input.getNumRows() != 1 && input.getNumCols() != 1 )
throw new IllegalArgumentException("One row or column must have a length of 1 for it to be a vector");
int length = Math.max(input.getNumRows(),input.getNumCols());
if( length != 5 )
throw new IllegalArgumentException("Length of input vector is not 5. It is "+length);
output.a1 = input.data[0];
output.a2 = input.data[1];
output.a3 = input.data[2];
output.a4 = input.data[3];
output.a5 = input.data[4];
return output;
}
/**
* Converts {@link FMatrixRMaj} into {@link FMatrix6}
*
* @param input Input matrix.
* @param output Output matrix. If null a new matrix will be declared.
* @return Converted matrix.
*/
public static FMatrix6 convert(FMatrixRMaj input , FMatrix6 output ) {
if( output == null)
output = new FMatrix6();
if( input.getNumRows() != 1 && input.getNumCols() != 1 )
throw new IllegalArgumentException("One row or column must have a length of 1 for it to be a vector");
int length = Math.max(input.getNumRows(),input.getNumCols());
if( length != 6 )
throw new IllegalArgumentException("Length of input vector is not 6. It is "+length);
output.a1 = input.data[0];
output.a2 = input.data[1];
output.a3 = input.data[2];
output.a4 = input.data[3];
output.a5 = input.data[4];
output.a6 = input.data[5];
return output;
}
/**
* Converts {@link FMatrixRMaj} into {@link FMatrixRBlock}
*
* Can't handle null output matrix since block size needs to be specified.
*
* @param src Input matrix.
* @param dst Output matrix.
*/
public static void convert(FMatrixRMaj src , FMatrixRBlock dst ) {
if( src.numRows != dst.numRows || src.numCols != dst.numCols )
throw new IllegalArgumentException("Must be the same size.");
for( int i = 0; i < dst.numRows; i += dst.blockLength ) {
int blockHeight = Math.min( dst.blockLength , dst.numRows - i);
for( int j = 0; j < dst.numCols; j += dst.blockLength ) {
int blockWidth = Math.min( dst.blockLength , dst.numCols - j);
int indexDst = i*dst.numCols + blockHeight*j;
int indexSrcRow = i*dst.numCols + j;
for( int k = 0; k < blockHeight; k++ ) {
System.arraycopy(src.data,indexSrcRow,dst.data,indexDst,blockWidth);
indexDst += blockWidth;
indexSrcRow += dst.numCols;
}
}
}
}
/**
* Converts {@link FMatrixRBlock} into {@link FMatrixRMaj}
*
* @param src Input matrix.
* @param dst Output matrix. If null a new matrix will be declared.
* @return Converted matrix.
*/
public static FMatrixRMaj convert(FMatrixRBlock src , FMatrixRMaj dst ) {
if( dst != null ) {
if( dst.numRows != src.numRows || dst.numCols != src.numCols )
throw new IllegalArgumentException("Must be the same size.");
} else {
dst = new FMatrixRMaj(src.numRows,src.numCols);
}
for( int i = 0; i < src.numRows; i += src.blockLength ) {
int blockHeight = Math.min( src.blockLength , src.numRows - i);
for( int j = 0; j < src.numCols; j += src.blockLength ) {
int blockWidth = Math.min( src.blockLength , src.numCols - j);
int indexSrc = i*src.numCols + blockHeight*j;
int indexDstRow = i*dst.numCols + j;
for( int k = 0; k < blockHeight; k++ ) {
System.arraycopy(src.data,indexSrc,dst.data,indexDstRow,blockWidth);
indexSrc += blockWidth;
indexDstRow += dst.numCols;
}
}
}
return dst;
}
}