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Hi I'm trying to understand the names of the output I get from extracting the loadings and the factor scores from fa() when I export to csv the $loadings I get the following columns in this order: MR4, MR3...

Dear R-users I am trying to make an adjusted Kaplan-Meier curve (using the Survival package) but I am having difficulty with plotting it so that the plot only shows the curves for the adjusted results. My data come...

Hi I have used fa() to perform a factor analysis of a psychological battery which is thought to have 11 factors. I can identify which factors the loadings relate to easily enough because I can see which items are loading...

Dear R help I have conducted a fa() analysis, and I want to use fa.diagram to assess the extent to which the 11 latent factors predict the 37 items in a psychological battery. However, the display on the screen...

Dear Terry and David Thank you so much for your rapid and helpful replies! I've changed tack slightly and decided to focus on the effect modifiers which had the greatest effect on the outcome of the trial (HowmanyZonnic_Q...

Dear Professor Carlson Thank you so much! The $Structure command displays the loadings with the same style of column heading as the $scores (i.e. [,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10] [,11]), and makes me so...

Dear Prof Carlson Thank you very much. As far as I can tell, factor.scores requires an object from class grm, itm, rason, or tpm; which I think are part of the irt package with which I am unfamiliar. I...

Dear Bill Wow! Thank you so much for your rapid reply - you are such a kind person, thank you! I'll try fa.rgraph - thanks Thanks Best wishes Brent -----Original Message----- From: William R Revelle [mailto:revelle at northwestern.edu...