This performs pca on an interaction_model, where if a (row_id,col_id) are not present in the data, then it is presumed NA and imputed. This contrasts to the other pca function which imputes the missing values to zero.
This performs pca on an interaction_model, where if a (row_id,col_id) are not present in the data, then it is presumed NA and imputed. This contrasts to the other pca function which imputes the missing values to zero.