Semi-transparent markers in Matlab Figures
matlab, matlab-figure, transparency
Solution
AFAIK, you cannot change the alpha values of the plot markers in `scatter`. One solution would be to `patch` to draw markers yourself. Alpha values can be set for `patch()` objects and you will get the desired effect when markers overlap. However, this can get quite cumbersome and will need to be customized to your needs.
See this related question, where the function defined in the question does exactly that. You can use that as a starting point and work from there.
Problem
I want to plot a scatter plot with filled markers and make them semi-transparent so when two or more markers overlap, the overlapping area will be more opaque. I naively thought ``` sg = scatter(rand(1000,1),rand(1000,1), 'filled'); alpha(0.5) ``` would work, but it doesn't. Also ``` set(get(sg, 'Children'), 'FaceAlpha', 0.2) ``` doesn't work. Any ideas?