When issuing the DNAcopy command

  plot(segment, plot.type="c", xmaploc=TRUE)

I get in RStudio a kind of grey grid of plots of which I can click one to get the fill picture.

I would like instead to get all 24 plots as separate pictures at once and have knitr convert them at knit-time to full pictures in the rendered document.

Any idea how I could loop and show all 24 pictures one after the other in my knitr produced pdf?

Alternatively a multiplot of 6x4 images would be nice but I did not succeed to produce one with par(mar())

Thanks