How to plot principal component (PCA)?

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leae 2021-6-1

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https://ww2.mathworks.cn/matlabcentral/answers/845640-how-to-plot-principal-component-pca

回答： Sulaymon Eshkabilov 2021-6-1

Hello,

I have a double 10x160260, and I would like to do a PCA of the 10 different variables, and to obtain the plot of PC1 and PC2.

How is this possible knowing the significqnt size of my dataset?

Thanks for your help

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Sulaymon Eshkabilov 2021-6-1

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https://ww2.mathworks.cn/matlabcentral/answers/845640-how-to-plot-principal-component-pca#answer_714825

Here are two nice documentation that address your raised questions:

https://www.mathworks.com/help/stats/pca.html

https://www.mathworks.com/help/stats/partial-least-squares-regression-and-principal-components-regression.html

NOTE: there is one important point that is not to perform overfitting while applying PCA and PLSR analyses.

Moreover, don't forget to perform variance analysis of how many principal components to choose.

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