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yang yang

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01 Jun 2013 Arrow3 Version 5 Draws lines with directional arrowheads. Author: Tom Davis

Thanks for your arrow3 program.
28 Mar 2013 Soft Independent Modeling of Class Analogy (SIMCA) M-files for classes modeling and prediction by SIMCA Author: Cleiton Nunes

Does the statement, ca = sqrt(2)*erfinv(cl/100), on line 148 in the file of simca.m represents the upper 1 − α quantile of the standard normal distribution? Does it equals to norminv(α,0,1)in Matlab?
27 Mar 2013 Soft Independent Modeling of Class Analogy (SIMCA) M-files for classes modeling and prediction by SIMCA Author: Cleiton Nunes

SVD: X=U*sigma*V'
PCA: X'*X=V*sigma^2*V'
Thus,eigenvalues are on the diagonal of sigma^2.
The calculation for Qlim in the file of SIMCA.m might be fixed for the vector eive consisting of the singular values rather than the eigenvalues.
18 Mar 2013 Soft Independent Modeling of Class Analogy (SIMCA) M-files for classes modeling and prediction by SIMCA Author: Cleiton Nunes

The statement,
t = E*inv(diag(eive(1:cpret).^.5)), on line 115 in simca file might be written as
t = E*inv(diag(eive(1:cpret))).

04 Nov 2011 LABELNET Plots neurons and inputs of a self-organizing network on a 2D weight map. Author: Ikaro Silva

good

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19 Mar 2013 Soft Independent Modeling of Class Analogy (SIMCA) M-files for classes modeling and prediction by SIMCA Author: Cleiton Nunes chemometrics, classification, simca, svd 13 5
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