The standard MATLAB plot() function can produce opaque plots only. plot_transparently circumvents this drawback by plotting curves using patch() instead of plot(). It supports most of the normal line series properties you would use with plot(). If you need more properties, it is easy enough to add them to the code, because the code is trivial. Enjoy!
Yury (2020). plot_transparently (https://www.mathworks.com/matlabcentral/fileexchange/31207-plot_transparently), MATLAB Central File Exchange. Retrieved .