My aim is to create a polar plot from a data set, where an additional data column defines the fill color radially out from the center. Can this be done in PGFPlots?
In the example below, I create a three column data set where x is the angle, y is a measured value, and z is an additional measured value I would like to include through coloring. The example compiles, and the marker color is changed in the scatter plot. In terms of coloring, this is what I am aiming for:
\documentclass{standalone}\usepackage{pgfplots}\usepgfplotslibrary{polar}\usepackage{filecontents}\def\mydata{mydata.csv}\begin{filecontents*}{\mydata} x,y,z -80,5,0 -60,6,1 -40,2,2 -20,7,3 0,5,4 20,3,5 40,7,6 60,3,7 80,4,8\end{filecontents*}\begin{document}\begin{tikzpicture} \begin{polaraxis}[ % x-axis xtick={-90, -45, 0, 45, 90}, % y-axis ytick = {40, 80}, % limits domain = -90:90, xmin = -90, xmax = 90, % colors colormap/viridis, point meta min = 0, point meta max = 8,]\addplot[point meta = explicit, scatter, polar comb] table [x=x, y=y, meta=z, col sep=comma] {\mydata};\end{polaraxis}\end{tikzpicture}\end{document}Instead of coloring the markers, my aim is to fill with that color from the origin to the y-value, rather like a pie chart. 'Polar comb' looks promising, but I am not able to color the comb line (only the marker) and the comb also does not fill between lines (i.e. fill the whole segment). I have tried various [fill=...] options in \addplot but I can only get a single color fill.