principal component analysis factor (PCAF)

[Sally Ahmed]

Hello,

I would like to get the principal component
analysis factor (PCAF) of three variables and group them in only one variable what is the Stata code for that?

[Carlo Lazzaro]

Sally:
see -help pca-.

[Sally Ahmed]

Thank you for your reply. I have checked both help for pca and factor and I don't know what is the difference between them and most importantly how to create a new variable which is produced from the principal factor of three

[Carlo Lazzaro]

Sally:
for a definition of the difference between the two approaches, see the chapter Factor analysis in -factor- entry, Stata .pdf manual.
Provided that I would go -pca- see -eigenvalues- and -eigenvectors- in -pca- related entry, same source.