Thanks Jim! I followed the instructions in the FAQ and wrapped print()
around my function calls. The images are now properly generated.
Rex
On Thu, Jan 14, 2010 at 4:38 PM, jim holtman <jholt...@gmail.com> wrote:
> If you are using lattice, check out FAQ 7.22
>
> On Thu, Jan 14, 2010 at 5:15 PM, Rex C. Eastbourne <
> rex.eastbou...@gmail.com> wrote:
>
>> I am encountering problems using the png() function to save around 20
>> charts
>> to separate files.
>>
>> My script is conceptually structured as follows:
>>
>> ### <script>
>> png("Image %03d.png")
>>
>> # the following are calls to user-defined functions I wrote that call
>> plot,
>> barchart, etc. with special arguments.
>> myPlot("a")
>> myPlot("b")
>> myPlot("c")
>>
>> myBarchart("a")
>> myBarchart("b")
>> myBarchart("c")
>>
>> myBarchart2("a")
>> myBarchart2("b")
>> myBarchart2("c")
>>
>> dev.off()
>> ### </script>
>>
>> When I run the code a few lines at a time it generates the images
>> correctly.
>> However, when I execute all lines of the script at once (Ctrl+A, Ctrl+R in
>> the Rgui editor), the output doesn't get generated right. Most notably:
>>
>> - Only one plot created by myBarchart (or myBarchart2) gets saved, instead
>> of all 3
>> - Some images are blank
>>
>> I'm having trouble isolating the problem to one line of code.
>>
>> I suspect there is some fundamental paradigm I'm not aware of about how R
>> devices and images work, perhaps relating to the importance of the order
>> in
>> which the calls to png, dev.off(), etc. are executed, the required state
>> of
>> my workspace before I run the code (e.g. whether the previous plot window
>> should be open or closed), or maybe even time dependency (do I need to
>> insert timed pauses so that my diagram has time to render before saving to
>> a
>> file?).
>>
>> Does this ring a bell to anyone? I read the R documentation on devices and
>> png(), and searched the mailing list archives and the web, but haven't
>> figured out how to get this working. Any help would be appreciated.
>>
>> Thanks,
>>
>> Rex
>>
>> [[alternative HTML version deleted]]
>>
>> ______________________________________________
>> R-help@r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide
>> http://www.R-project.org/posting-guide.html<http://www.r-project.org/posting-guide.html>
>> and provide commented, minimal, self-contained, reproducible code.
>>
>
>
>
> --
> Jim Holtman
> Cincinnati, OH
> +1 513 646 9390
>
> What is the problem that you are trying to solve?
>
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