![]() ![]() "Reddit gave me a hard time posting images. Reddit post by Kaugummiheld in answer to a post "Veusz approach/alternative to boolean indexing?" Well, I sort of found my answer, but it doesn't seem to work: To put it another way, I commonly don't know exactly what I need to plot beforehand. It often takes a lot of comparison of different things in different ways before I can figure out what that data are showing. I should mention that the reason that I would like to filter data sets like this is that I work with rock and water geochemical data, which is very messy. I've read through on-line help and manual documents, and a lot of these Reddits, which have a lot of great material, but not quite what I'm looking for. Maybe there's a way to do the same thing in the data set editor. I've noticed there are ways to show different colors for data points, so there might be a way to make points invisible if they don't match the criteria. I've tried the Filter Data tool (funnel-shaped icon), but I'm not sure if that's the right tool, and in any case I haven't been able to figure out the expression syntax. In Veusz, as I understand it, I would add three XY widgets, but I haven't figured out how to plot only one type for each widget. In Coplot, a subset of each data set can be made using Plot-If-True Boolean expressions, like this: col(1)=1, which is read: If column 1 (Type) equals 1, plot the data point. What I would like to do is plot the 3 samples of each different Type using different colors and symbols, such as Type 1 as black squares, Type 2 as red circles, and Type 3 as blue triangles.
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