Details
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Bug
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Status: Closed
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Major
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Resolution: Fixed
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1.2
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None
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None
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None
Description
org.apache.commons.math.linear.RealMatrixImpl#operate tries to create a result vector that always has the same length as the input vector. This can result in runtime exceptions if the matrix is non-square and it always yields incorrect results if the matrix is non-square. The correct behaviour would of course be to create a vector with the same length as the row dimension of the matrix.
Thus line 640 in RealMatrixImpl.java should read
double[] out = new double[nRows];
instead of
double[] out = new double[v.length];
