Brent,
 Try setting the cex parameter to make the numbers smaller. 
Also try modifying the e.size (ellipse size) parameter.

Then, to make much better looking graphs, see if you can install Rgraphviz and 
try using the fa.rgraph function or use the graphviz=TRUE parameter.
fa.diagram was a hack to get around the problem that graphviz was very hard to 
install and sometimes would not even be possible to use.  The preferred 
function (if you have Rgraphviz) is fa.rgraph.

Bill



On Nov 26, 2012, at 10:08 PM, Brent Caldwell <brent.caldw...@otago.ac.nz> wrote:

> 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 has very large 
> font size for the coefficients of the relationship between the 11 factors and 
> the 37 items, so the numbers overlap and are therefore illegible.  When I 
> output this to a pdf the problem is exacerbated even further (see 
> attachments).  I tried to use cex=0.8 and cex=0.4 in the pdf argument but it 
> made no difference - what can I do?
> The code I used is:
> fa.diagram(fa.11factors.rawdata)
> # Start PDF device driver to save output to fa_diagram.pdf
> pdf(file="I:\\ZAPi\\Tables-of-R-output\\fa_diagram.pdf", height=10, width=5)
>       fa.diagram(fa.11factors.rawdata)
>       #box() # Create box around plot
>       dev.off() # Turn off device driver (to flush output to PDF)
> 
> pdf(file="I:\\ZAPi\\Tables-of-R-output\\fa_diagram_cex.pdf", height=8, 
> width=5)
>       fa.diagram(fa.11factors.rawdata,cex=0.8)
>       #box() # Create box around plot
>       dev.off() # Turn off device driver (to flush output to PDF)
> Thank you so much for your time
> Yours sincerely
> Brent Caldwell
> 
> <fa_diagram_cex.pdf><fa_diagram.pdf>______________________________________________
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William Revelle                    http://personality-project.org/revelle.html
Professor                                  http://personality-project.org
Department of Psychology   http://www.wcas.northwestern.edu/psych/
Northwestern University    http://www.northwestern.edu/
Use R for psychology             http://personality-project.org/r
It is 5 minutes to midnight        http://www.thebulletin.org

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