Hello,
Em 09-09-2012 18:36, Fred escreveu:
hey Sarah,
thanks for your help !!
Of Course I put the second quote also (I forgot to put it on the last post).
Sorry, I don't get the my.plot.code...
What Sarah meant is that you must put your.plot.code between the
instructions that open and close the graphics device. This is example 1
from the 'gplots::heatmap.2' help page, adapted.
# From ?gplots::heatmap.2
library(gplots)
data(mtcars)
x <- as.matrix(mtcars)
# Plot nothing, but like Jeff said (suggested) it does something
# it opens the device and closes it
png(file = "myplot.png", bg = "transparent")
dev.off() # 318 bytes file in current directory
# Plot an heatmap.2, example 1 in ?gplots::heatmap.2
png(file = "heatmap2.png")
heatmap.2(x) ## default - dendrogram plotted and reordering done.
dev.off() ## 10Kb file in current dir
# The same but to a jpeg graphics device
jpeg(file = "heatmap2.jpeg")
heatmap.2(x) ## same as above
dev.off() ## 46Kb file
Hope this helps,
Rui Barradas
# I'm new in R and use it only to
draw heatmaps right now.
Well, I did forget the dev.off(). # but I got
null device (1) # when quartz is turned off and when it's on I get : "
quartz 2".
But I don't have any files called "heatmap.2.png " on my computer.
I really don't understand why I don't get anything !
and when I do:
jpeg ("heatmap.jpg") # it works but I get only a 20kb picture which is
useless in my case (edit and work on it in photoshop)
Fred
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