[R] Need help with pointLabels()

Greg Snow Greg.Snow at imail.org
Mon Nov 15 21:54:44 CET 2010

What package is pointLabel (or is it pointLabels) in?  giving a reproducible example includes stating packages other than the standard ones.

What you are trying to do is not simple for general cases, some tools work better on some datasets, but others work better on other datasets.

Some other tools that may help (but you will probably need to do some hand tweaking after using them, or basing your solution on these) could be:

thigmophobe.labels in the plotrix package
spread.labels in the plotrix package
TkIdentify in the TeachingDemos package
spread.labs in the TeachingDemos package

Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
greg.snow at imail.org

> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] On Behalf Of Craig Starger
> Sent: Monday, November 15, 2010 12:38 PM
> To: r-help at r-project.org
> Subject: [R] Need help with pointLabels()
> Hello R-list,
> I am plotting a weighted linear regression in R. The points on my chart
> are
> also scaled to sample size, so some points are large, some are small. I
> have
> figured out everything I need using the plot() function: how to plot
> the
> points, scale them by sample size, weight the linear regression by
> sample
> size, plot that line, and plot the labels for the points. However,
> although
> the pointLabel() function assures that the labels do not overlap with
> each
> other, they still overlap with the larger points, and sometimes run off
> the
> side of the chart too. I have tried saving the plot as EPS, PDF, SVG
> and
> opening them in GIMP to try to move the text around, but GIMP does not
> recognize the text as text, so I cannot select the labels and move them
> off
> the points. I have tried various "offsets" too but that does not work
> either. So I need to either (a) print the labels on the plot so that
> they do
> not overlap the points or (b) be able to move the text around in the
> resulting image file. Any advice? Here is the code I am using. BTW, I
> have
> also tried ggplot2 but it has no function (that I am aware of) like
> pointLabels() to avoid label overlap. Please feel free to email me
> directly.
> postscript(file="fig_a.eps");
> plot(x, y, xlab="X-axis", ylab="Y-axis", cex=0.02*sample_size, pch=21);
> abline(lm(y~x, weight=sample_size))
> pointLabel(x, y, labels=Category, cex=1, doPlot=TRUE, offset=2.5);
> dev.off()
> Thank you,
> -craig.starger at gmail.com
> 	[[alternative HTML version deleted]]
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