Stata Pca Predict. Stata s indifferent to what name you give so long as it is new and legal and indeed predict p3 predict p777 would give you further identical copies of the first pc. It helps you reduce the number of variables in an analysis by describing a series of uncorrelated linear combinations of the variables that contain most of the variance.
Pca is very good to find such an index if you reach a solution with one major first principal component explaining the by far major part of variance. If you have specified the vce normal option pca has stored the coefficients e b and the associated variance covariance matrix e v and you can use standard stata commands to test hypotheses about the principal components and eigenvalues confirmatory principal component analysis for instance with the test lincom and testnl commands. Do you know of an option that could allow for this or is it not a feature in stata.
I can t seem to find any options on stata that do not scale the pc s to have mean 0.
The index corresponds to the component scores. Do you know of an option that could allow for this or is it not a feature in stata. Pca is very good to find such an index if you reach a solution with one major first principal component explaining the by far major part of variance. An important feature of stata is that it does not have modes or modules.
