What would be equally interesting to see, would be the same swatch at half the width you've shown. Or double, but who wants to do that much for a swatch?

There was an article a while back in Knitter's which discussed something similar.

Also, there's a pattern I've got my eye on that involves what I think are short row inserts when you reach a certain color section in a specific space-dyed yarn. Since you generally don't know the repeat length, or the segment length in a given yarn, it is hard to come up with a substitute for the specific yarn.

I remember reading something a long time ago, but I think it related to a beading project. Anyway, the idea was to work a test piece in a white yarn of the same weight, use marker to put dots at the edges, then rip it and measure the intervals. Then if you know the repeat length for your chosen yarn, you can make some plans. There are ways to cheat if the item is to have seams, or you don't mind making joins.