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A general description is here.
‘factanal()’ now returns the rotation matrix if a rotation such as ‘"promax"’ is used, and hence factor correlations are displayed. (Wish of PR#12754.)
Environment variable ‘SWEAVE_OPTIONS’ can be used to supply defaults for existing or new options to be applied after the Sweave driver setup has been run.
‘Sweave()’ has options to produce PNG and JPEG figures, and to use a custom function to open a graphics device (see ‘?RweaveLatex’). (Based in part on the contribution of PR#14418.)