Example usage for org.apache.commons.math.linear RealMatrix setRowMatrix

Introduction

In this page you can find the example usage for org.apache.commons.math.linear RealMatrix setRowMatrix.

Prototype

void setRowMatrix(int row, RealMatrix matrix) throws MatrixIndexException, InvalidMatrixException;

Source Link

Document

Sets the entries in row number row as a row matrix.

Usage

From source file:dr.math.Procrustes.java

/**
 * procrustinate the complete matrix of coordinates
 * @param X the matrix containing coordinates (same dimensions as X in the constructor)
 * @return the transformed matrix/* w w  w  . j a va2  s .c om*/
 */
public final RealMatrix procrustinate(RealMatrix X) {
    if (X.getRowDimension() != rowDimension) {
        throw new IllegalArgumentException("X does not have the expected number of rows");
    }
    if (X.getColumnDimension() != columnDimension) {
        throw new IllegalArgumentException("X does not have the expected number of columns");
    }

    //       X.new <- s * X %*% R + matrix(tt, nrow(X), ncol(X), byrow = TRUE)
    RealMatrix tt = new Array2DRowRealMatrix(rowDimension, columnDimension);

    for (int i = 0; i < rowDimension; i++) {
        tt.setRowMatrix(i, T.transpose());
    }

    // rotate, scale and translate
    return X.multiply(R).scalarMultiply(s).add(tt); // Was a bug here
}

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