Vertical Number Line

[greengrass]

I'm currently using Fred Weinhaus' spectrumhist to generate some histograms from images. Thanks Fred. Your scripts saved me a great deal of time.

Now I would like to post process the output and add a vertical scale, labeled with 10,20,30....90 and 5,15,25 horizontal marks. A number line based on percentages. Any hints or pointers on a low overhead solution to produce this type of scale so as to be able to judge the relative height of each block in the histogram would be appreciated.

[fmw42]

You could overlay a grid, with my grid script. Or you could use -draw to make a scale image with tics and labels and append it to one or both sides of the image. See -draw and caption, annotate, etc.
http://www.imagemagick.org/Usage/draw/#primitives
http://www.imagemagick.org/Usage/text/

[greengrass]

Thanks Fred. I knew someone would have a solution to hand. Sorry I didn't read all you script descriptions. I'll just add numbers to the output.