[R] textplot() in wordcloud package

Mon Mar 16 17:16:43 CET 2015

Just a quick note to thank David Carlson and Jim lemon for the helpful replies on this... 

The easiest solution are to punt on WordCloud and use either the plotrix or maptools packages.

In plotrix the function is thigmophobe.labels().  In mapTools it's pointLabel()

Neither complains when you pass it the pos= parameter.

Thank you one and all!

Best, Fraser

-----Original Message-----
From: David L Carlson [mailto:dcarlson at tamu.edu] 
Sent: Monday, March 16, 2015 12:02 PM
To: David L Carlson; Fraser D. Neiman; r-help at r-project.org
Subject: RE: textplot() in wordcloud package

Another possibility is to use pointLabel() in package maptools. For your example

library(maptools)

plot(x,y)
pointLabel(x, y, text1)

Advantages of pointLabel() are that it returns a list of the x and y coordinates of the labels that you can tweak if necessary and, at least in your example, it does a better job of avoiding labels being chopped at the plot margins.

-------------------------------------
David L Carlson
Department of Anthropology
Texas A&M University
College Station, TX 77840-4352

-----Original Message-----
From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of David L Carlson
Sent: Monday, March 16, 2015 10:44 AM
To: Fraser D. Neiman; r-help at r-project.org
Subject: Re: [R] textplot() in wordcloud package

You should contact the package maintainer about this. The problem is that the pos= argument is being passed to strwidth() and strheight() and those functions do not know what to do with it. In the meantime:

suppressWarnings(textplot(x,y, text1, new=F, show.lines=F,  
          pos=4))

will eliminate the warnings.

-------------------------------------
David L Carlson
Department of Anthropology
Texas A&M University
College Station, TX 77840-4352

-----Original Message-----
From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of Fraser D. Neiman
Sent: Friday, March 13, 2015 3:29 PM
To: r-help at r-project.org
Subject: [R] textplot() in wordcloud package

Dear All,

The textplot() function in the wordcloud package seem to do a good job with generating non-overlapping labels on a scatter plot.
But it throws "warnings" when I try to use the pos= parameter to position the text labels relative to a given x-y point.

Here is a simple example:

 x<-runif(100)
 y<-runif(100)
text1<- rep('LAB', 100)

 plot(x,y)
 textplot(x,y, text1, new=F, show.lines=F,  
          pos=4)

There were 50 or more warnings (use warnings() to see the first 50)
> warnings()
Warning messages:
1: In strwidth(words[i], cex = cex[i], ...) : "pos" is not a graphical parameter
2: In strheight(words[i], cex = cex[i], ...) : "pos" is not a graphical parameter 

How can I pass the pos=parameter to text() without generating the warnings?

I am doubly puzzled by the warnings because in the graph that results from the foregoing code, The labels are to the  right of the points, as 'pos=4' requests.

Thanks!

Fraser D. Neiman

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