Skip to content

Psych package: fa.diagram, how to re-arrange layout so numbers do not over-write each other

4 messages · Brent Caldwell, William Revelle

#
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

-------------- next part --------------
A non-text attachment was scrubbed...
Name: fa_diagram_cex.pdf
Type: application/pdf
Size: 12261 bytes
Desc: fa_diagram_cex.pdf
URL: <https://stat.ethz.ch/pipermail/r-help/attachments/20121127/e2702443/attachment.pdf>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: fa_diagram.pdf
Type: application/pdf
Size: 12349 bytes
Desc: fa_diagram.pdf
URL: <https://stat.ethz.ch/pipermail/r-help/attachments/20121127/e2702443/attachment-0001.pdf>
#
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.caldwell at otago.ac.nz> wrote:

            
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
#
Brent,
  No, cex doesn't work (as you have discovered).  That is a bug.
I will work on it.

In the meantime, try Rgraphviz called from fa.rgaph or
use the output from fa.graph which produces a dot file for processing with any graphic package (including graphviz) which handles the dot language.

 

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

            
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
#
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] 
Sent: Tuesday, 27 November 2012 5:54 p.m.
To: Brent Caldwell
Cc: r-help at R-project.org
Subject: Re: [R] Psych package: fa.diagram, how to re-arrange layout so numbers do not over-write each other

Brent,
  No, cex doesn't work (as you have discovered).  That is a bug.
I will work on it.

In the meantime, try Rgraphviz called from fa.rgaph or use the output from fa.graph which produces a dot file for processing with any graphic package (including graphviz) which handles the dot language.

 

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

            
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