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DisplayTogether, multiple ListPlots, compound paths, and Illustrator/EPS problems
For various reasons, I like to generate plots with multiple curves and points using DisplayTogether rather than, for example, MultipleListPlot. (DisplayTogether allows one to combine Plots, ParametricPlots, ListPlots, and so on, all into one graphic, while keeping the generation and editing of each plot separate; and it generally seems to work well.) There's one minor glitch that's come up, however, which I'll report here just for the record. My practice is to Export the resulting plots as EPS files, then touch them up with Illustrator (9.0 on Mac OS 9.2). Recently in doing this I discovered that three curves in a certain graphic, originally generated by three separate ListPlots each with PlotJoined->True, seemed to be inextricably linked in the resulting Illustrator graphic. I wanted them to be different colors and weights, but even though I could select the individual lines separately in Illustrator, any changes made to one of them seemed to be unavoidably applied to all of them, and nothing I could do seemed to unlink them, or UnGroup them in Illustrator jargon. The cure (obtained from another NG) was a somewhat obscure and not at all well-documented Illustrator command, namely select all three lines (they're actually Compound Paths in Illustrator jargon) and activate the menu command Object->Paths->Compound path->Release After that they were fully separated and separately editable.