[R] how to save a heatmap.2 in png /jpeg /tiff

[Sarah Goslee]

Normally the workflow is:

png("heatmap.png") # don't forget the second quote, as you did below
my.plot.code # whatever you need to draw the heatmap
dev.off() # people often forget this step - did you?

You'll probably want to adjust the size and resolution settings for
png() to get the desired high-resolution output; see ?png for details.

Sarah

On Sun, Sep 9, 2012 at 10:04 AM, STADLER Frederic
<frederic.stadler at unifr.ch> wrote:
> Hey, I am still working on my heat map (for those who are read my previous post about row.names)…
> Now, I would like to save my heat map.2 in .png or .tiff in order being able to work on the picture in photoshop, but it doesn't work.
> I'am using (as I have found on some forum)
>> png("heatmap.2.png)  # and it just doesn't work. when I try doing it with::
>>jpeg("heatmap.2.jpeg) # it works once every 10 times, but it's a 22kb file. completely use less !!!
>
> I really need to have high quality image, as I will have to work on photoshop and also I will have to cut and zoom in just some lines of my heatmap.
>
> #here is the code I use for my heatmap.2 :
>>heatmap.2(a_matrix, Rowv=NA, Colv =NA, col=greenred(60), scale="column", margins=c(7,10), trace="none", density.info=c("none"))
>
> Does someone know what I have to do in order to get my heatmap.2.png ??? Do I need some other package (I only use gplots, to allow the heatpmap.2)
>
> THANKS for your help
> Fred
>



-- 
Sarah Goslee
http://www.functionaldiversity.org