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kevinhughes27/eigen3_snips.cpp

Last active July 22, 2023 00:15
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Eigen3 Snips
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eigen3_snips.cpp
using namespace Eigen;
// these are the typedefs I like to work with
typedef Matrix< double, Dynamic, 1, ColMajor > EVector;
typedef Matrix< double, Dynamic, Dynamic, ColMajor > EMatrix;
// Mean
EVector mean = X.rowwise().sum() / X.rows();
// Standard Deviation
EVector std = (X.rowwise() - mean.transpose()).array().pow(2).colwise().sum() / X.rows();
// Mean Center
EMatrix Xc = X.colwise() - mean;
@sohale
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sohale commented Jul 22, 2023

I think it's variance, not standard deviation, hence, it should be called var or a similar name.

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