Adjusting weights for asset index

[Erin Crossett]

Hi Statalist,

I have baseline and endline datasets that I'm using to compare changes in asset indices. For the baseline, I'm conducting principle component analysis on the common set of assets across both survey rounds, and I want include their weights. As such, I need to save the following matrices:

1. e(L) the factor loadings
2. e(sds) the standard deviation of the variables
3. e(means) the mean of variables

After running pca on the baseline, what commands do I need to use to save these matrices? In order to create the new wealth index for the endline, how can I merge these matrices to the endline? I haven't worked with matrices so any input is helpful.