How to save a graphic in R instead of visualizing it?

Question

I a bit of code that produces a matrix. I then generate a heatmap from this matrix using the function:

heatmap(d)

However, I would like to be able to save this img directly and bypass displaying the graphic, so that I can incorporate this function into a unix-based workflow.

Can someone please show me the snippet of code required to save this image without displaying it on screen? Thanks!

Answer 1

Use jpeg(), png() or tiff() to create the file.

jpeg(file="filename.jpg")
heatmap(d)
dev.off()