Why is PCA returning only one component when I have 50 variables?

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Kim
Kim 2014 年 8 月 20 日
I am trying to use PCA in Matlab 2013. I have 50 variables with 52 observations for each. In the example given in documentation there is a component (as I understand each column of coefficients is a component) for each variable. When I do (coeffs, scores)=pca(data) I only get one column of coefficients with 52 rows. Can anyone explain what I am doing wrong please? Thanks!

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