principal components analysis program

[tony]

Hi everyone
I want to make a program on principal components analysis. I know there is menu operation about this.
So, can someone provide me some information about codes of making principal components analysis program.
Or, are there some commands about this?
Thanks a lot!

[EViews Gareth]

What exactly are you trying to do?

[tony]

I want to:
1) compute the principal components of the estimated correlation or
covariance matrix of a group of series,
2)display the table of eigenvalues and eigenvectors, display line graphs of the ordered
eigenvalues, and examine scatterplots of the loadings and component scores,
3)save the component scores and corresponding loadings to the workfile.

All these things should be performed by command rather than by menu operation.
How to do?
Could you tell me in detail?
THANKS

[EViews Glenn]

Look in the EViews Object Reference Manual. Find the Group object, and look at

pcomp

and

makepcomp