I want to plot a number of graph using this for loop. however, I can only get one output (foo0001).
for (i in 1:5) {
bitmap("foo%03d.jpg")
plot(runif(20), ylim = c(0, 1))
dev.off()
}
please help!
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1 Answer
bitmap writes each page (plot) to consecutive files according to the format string chosen. Calling bitmap creates a new graphics device, resetting the page number. So, by plotting one plot per bitmap call, you are always writing to foo0001.jpg.
Instead, call bitmap just once:
bitmap("foo%03d.jpg")
for (i in 1:5) {
plot(runif(20), ylim = c(0, 1))
}
dev.off()
1 Comment
Cathy
wow, it works! This is my first time to ask question here. I'm so happy to get reply so quick. Thank you sooo much!