old PCA function documentation

Hi,

I am updating and incorporating in my analysis an old code written by someone else. To perform PCA they use the old function 'princomp'. Is there a place where I can find the documentation of such function?

In particular, does the option 'econ' called as below correspond to the modern 'Economy'=True?

thanks!

[..] = princomp(X,'econ')

Answer 1

[Walter Roberson]

Official archived documentation (which will disappear in about a year):

https://www.mathworks.com/help/releases/R2017b/stats/princomp.html?searchHighlight=princomp

And here is a post saying that princomp() just called pca() with some default options.

https://www.mathworks.com/matlabcentral/answers/77820-what-is-the-difference-between-pca-x-and-princomp-x-matlab-commands

[Mattia D'Andola]

thanks a lot!