[R] wait for graph to finish plotting

[news at aleblanc.cotse.net]

David Winsemius <dwinsemius at comcast.net> writes:

> On Oct 22, 2010, at 12:50 PM, <news at aleblanc.cotse.net> wrote:
>
>> Tal Galili <tal.galili at gmail.com> writes:
>>
>>> I suspect that using "dev.copy2eps" Is not going to help you here.
>>>
>>> Please try again using:
>>>
>>>  pdf(...)  # Check: ?pdf
>>>  for(i in something)
>>>  {
>>>     plot(things)
>>>  }
>>>  dev.off()
>>>
>>> But give pdf() the file path.
>>> Make sure you can make it work with simple plots.  then check it on
>>> your
>>> situation, and let us know if it works :)
>>> (I had it work with very heavy plots - so I trust it will work for
>>> you)
>>>
>>> (p.s: please keep cc'ing the r-help list so others will know the
>>> stage of your
>>> problem, in case others would like to add more help :) )
>>>
>>> Cheers,
>>> Tal
>>>
>>
>> The problem is that the filename changes with each iteration of the
>> loop, so I need to
>> save the graph inside the loop.
>> I tried this:
>>
>> for(...)
>> {
>>    ...
>>    pdf(...)
>>    barplot(...)
>> }
>>
>> but I just got a load of empty graphs.
>
> Because you failed to follow Ted directions to use dev.off()
>
> pdf() just opens the file for writing, dev.off() executes the writing
> and closes properly.
>
> --
> David.
I just tried with dev.off() but still the same problem.
I tried with pdf() and dev.off() inside the loop, and with them outside (pdf before the loop, 
and dev.off after). Same results each time: an empty pdf file.
I am using R version 2.11.1 if this makes any difference.
-- 
aleblanc