That worked! Thank you very much for the help.
I think I have one last question about qplot in ggplot2, That is exporting the
plot to JPG while in a loop. I tried what was recommended in "Re: [R] jpeg()
creating empty files with qplot() in a loop", however, I received some errors
(see below). I also tried using a PDF, but that did not work either, i.e. the
PDF produced was blank. Oddly enough the results produced using
"dev.print(file="qplot_output.jpg", device=jpeg, width=600) " in a loop are
blank, i.e. the JPG file is there, but it is blank. Unfortunately,
"ggsave(file="ggsave_qplot_output.jpg")" does not even produce a JPG file
output. Any help at this point is greatly appreciated. Is the problem related
to the fact that I need to use the plain "hist" and "dev.print" prior to using
ggplot's qplot?
Thanks again for all your help.
> for(jj in 0:4)
+ {
+ rnorm_test_data<-rnorm(1000,3,6)
+ hist(rnorm_test_data)
+ dev.print(file="test_data.jpg", device=jpeg, width=600)
+
+ plot.new()
+ qplot(rnorm_test_data, geom = "histogram", binwidth = 1) +
+ scale_x_continuous("Test Data") + scale_y_continuous("Frequency") +
+ scale_fill_discrete("qplot histogram")
+
+ # Print the plot to a JPG or PDF
+ dev.print(file="qplot_output.jpg", device=jpeg, width=600)
+ ggsave(file="ggsave_qplot_output.jpg")
+ ggsave(file = "ggsave_qplot_output.pdf")
+
+ }
Saving 6.9" x 6.89" image
Error in get(as.character(FUN), mode = "function", envir = envir) :
variable "jpg" of mode "function" was not found
>
g 6.9" x 6.89" image
Error in get(as.character(FUN), mode = "function", envir = envir) :
variable "jpg" of mode "function" was not found
P.S. Here is the
> sessionInfo()
R version 2.8.0 (2008-10-20)
i386-pc-mingw32
locale:
LC_COLLATE=English_United States.1252;LC_CTYPE=English_United
States.1252;LC_MONETARY=English_United
States.1252;LC_NUMERIC=C;LC_TIME=English_United States.1252
attached base packages:
[1] grid stats graphics grDevices utils datasets methods
base
other attached packages:
[1] ggplot2_0.8.1 reshape_0.8.2 RColorBrewer_1.0-2
proto_0.3-8 plyr_0.1.4 nortest_1.0 fBasics_280.74
timeSeries_290.79
[9] timeDate_290.81 vcd_1.2-1 MASS_7.2-44 colorspace_1.0-0
--- On Tue, 1/6/09, ONKELINX, Thierry <thierry.onkel...@inbo.be> wrote:
From: ONKELINX, Thierry <thierry.onkel...@inbo.be>
Subject: RE: [R] R Stacked Histogram
To: jasonkrup...@yahoo.com, r-help@r-project.org
Date: Tuesday, January 6, 2009, 9:54 AM
Dear Jason,
Have a look at scale_y_continuous() and scale_fill_discrete(). This might work
(untested as your example is not reproducible with a (dummy) dataset).
qplot(Age, data = recerts_combined_values, binwidth = 5, fill =
combined_values$Test.Type, main="Combined Age Histogram") +
scale_x_continuous("Age, months") +
scale_y_continuous("Counts") + scale_fill_discrete("Type of
Tests")
HTH,
Thierry
----------------------------------------------------------------------------
ir. Thierry Onkelinx
Instituut voor natuur- en bosonderzoek / Research Institute for Nature and
Forest
Cel biometrie, methodologie en kwaliteitszorg / Section biometrics, methodology
and quality assurance
Gaverstraat 4
9500 Geraardsbergen
Belgium
tel. + 32 54/436 185
thierry.onkel...@inbo.be
www.inbo.be
To call in the statistician after the experiment is done may be no more than
asking him to perform a post-mortem examination: he may be able to say what the
experiment died of.
~ Sir Ronald Aylmer Fisher
The plural of anecdote is not data.
~ Roger Brinner
The combination of some data and an aching desire for an answer does not ensure
that a reasonable answer can be extracted from a given body of data.
~ John Tukey
-----Oorspronkelijk bericht-----
Van: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] Namens
Jason Rupert
Verzonden: dinsdag 6 januari 2009 16:00
Aan: r-help@r-project.org
Onderwerp: Re: [R] R Stacked Histogram
Great advice. I did a quick read and came up with the following:
qplot(Age, data = recerts_combined_values, binwidth = 5,
fill = combined_values$Test.Type,
ylab="Counts", xlab="Age, months",
main="Combined Age Histogram",
legend.name = "Type of Tests")
Unfortunatley, here is a description of the results:
(1) the "main" title font size by default is too large and is clipped
by the image (guess I need to figure out how to fix this),
(2) ylab appears to fail - it does not replace the default "count"
label - what should I do to fix this?
(3) like (2), neither using "legend.name" nor
"legend.title" appears to replace/change the name of the legend
title/name.
By any chance can you provide some advice for tackeling these items? These
are probably due to me being a noobie on the ggplot2 package.
Thanks again.
--- On Mon, 1/5/09, hadley wickham <h.wick...@gmail.com> wrote:
From: hadley wickham <h.wick...@gmail.com>
Subject: Re: [R] R Stacked Histogram
Cc: r-help@r-project.org
Date: Monday, January 5, 2009, 7:42 AM
wrote:
> Understood. Will head the warning about odd way to display data.
>
> Any recommendations about where I look to find full details about
"qplot".
>
> I tried ?qplot, but it did not return full details.
>
> That description was missing a few items, e.g. fill, which is used below.
The best place to start is the qplot chapter of the ggplot2 book -
http://had.co.nz/ggplot2/book
Regards,
Hadley
--
http://had.co.nz/
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