I am trying to use ggplot() to produce a graph and am getting warnings that
I don't understand. This is happening from within RStudio, but also happens
if I start Windows R GUI. Can anyone help me understand the warning and
how to make sure the right fonts are designated? The relevant code fragment
is:
x11(width=7, height = 7)
library(ggplot2)
# Now some Distance ~ Time plots
p2 <- ggplot(lu.mig, aes(x=Time, y=Net.Distance, colour = PlateRow)) +
geom_point(size= 3) +
geom_line(size=1) +
facet_grid(Substrate ~ Expression) +
xlab("Time After Scratch (h)") +
ylab("Net half-distance (um)") +
opts(title='Repaired Raw 1205Lu Scratch Time Course') +
theme_bw(base_size = 18, base_family = "")
print(p2)
The warnings are:
There were 22 warnings (use warnings() to see them)
warnings()
Warning messages:
1: Removed 1 rows containing missing values (geom_point).
2: Removed 1 rows containing missing values (geom_path).
3: In grid.Call(L_textBounds, as.graphicsAnnot(x$label), ... :
Font family not found in Windows font database
4: In grid.Call(L_textBounds, as.graphicsAnnot(x$label), ... :
Font family not found in Windows font database
... snip ... # repeat same warning
22: In grid.Call.graphics(L_text, as.graphicsAnnot(x$label), ... :
Font family not found in Windows font database
If I comment out,
x11(width=7, height = 7)
so that the plot is drawn to the RStudio graphics device (or the default
device in R GUI), I only get the expected first two warnings. As I have
traced through the documentation I've seen reference to an 'Rdevga’ that may
be a culprit, but I can't quite understand how I set this up properly. Any
debugging pointers?
It also seems that if I replace x11() with windows(), the warnings
disappear. Somewhere (wrongly, I guess) I had gotten the impression that
x11() on the windows platform behaved just like windows(). For now, I've
just reverted to using windows(), but I'd like to understand this better,
particularly how to be certain ggplot() (or grid()) will be able to find a
default font. Of course, despite the warnings the graph draws fine so it
could be something to evaluation in ggplot.
Thanks,
Rob
R.Version()
$platform
[1] "i386-pc-mingw32"
$arch
[1] "i386"
$os
[1] "mingw32"
$system
[1] "i386, mingw32"
$status
[1] ""
$major
[1] "2"
$minor
[1] "15.0"
$year
[1] "2012"
$month
[1] "03"
$day
[1] "30"
$`svn rev`
[1] "58871"
$language
[1] "R"
$version.string
[1] "R version 2.15.0 (2012-03-30)"
$nickname
[1] ""
C:\Users\rbaer>path
PATH=C:\Perl\site\bin;C:\Perl\bin;C:\Program Files\GTK\bin;C:\Program
Files\ImageMagick-6.7.6-Q16;C:\Program Files\Mende
ley Desktop\wordPlugin;C:\Program Files\Common Files\Microsoft
Shared\Windows Live;c:\Rtools\bin;c:\Rtools\perl\bin;c:\R
tools\MinGW\bin;c:\Rtools\MinGW64\bin;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\Window
sPowerShell\v1.0\;C:\Program Files\Microsoft Application Virtualization
Client;C:\Program Files\WIDCOMM\Bluetooth Softwa
re\;C:\Program Files\Windows Live\Shared;C:\Program Files\MiKTeX
2.9\miktex\bin\;C:\Program Files\QuickTime\QTSystem\;C:
\GTK\bin;
------------------------------------------
Robert W. Baer, Ph.D.
Professor of Physiology
Kirksville College of Osteopathic Medicine
A. T. Still University of Health Sciences
800 W. Jefferson St.
Kirksville, MO 63501
660-626-2322
FAX 660-626-2965
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