I use QGIS to create surface plots for measurements made in the field. I use the contour plugin. I usually create ~50 contours in order to make a smooth surface. When I use print composer, I generally go in and remove most of the legend items so the legend isn't too large to fit. This is tedious and I'm working on a report with many (50+) plots... I want to do a conditional format. Something like divide the largest value by 10, then use only variables in the 10 "bins".
The issue is that I can't figure out how to "index" the individual values within the legend. If I select the legend item of interest (the contour grid values), then use expression builder, I seem to only be able to "index" one item in the legend (for instance, "symbol_count" is 1 and the "symbol_label" is only the first label in the legend. Here is an example:
I'm hoping there is some way to represent the entire value range within the legend as a variable so I would be able to work with the values, pare them down to ~10, then have them represented in the legend without so much clutter (or having to manually edit). Are there any legend experts that can help me identify a variable that represents the numbers vector for my legend(s)?