[R] textplot() in wordcloud package

Mon Mar 16 17:01:32 CET 2015

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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