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Use col method for column-major matrix
(grafted from a020d9b134ed804574845c0949c3b988ed56bcb5 )
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@ -168,7 +168,7 @@ class LeastSquareDiagonalPreconditioner : public DiagonalPreconditioner<_Scalar>
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{
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for(Index j=0; j<mat.outerSize(); ++j)
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{
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RealScalar sum = mat.innerVector(j).squaredNorm();
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RealScalar sum = mat.col(j).squaredNorm();
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if(sum>RealScalar(0))
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m_invdiag(j) = RealScalar(1)/sum;
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else
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