MATLAB: Plot Lines Displaying As Black (Plus Gradient?)

Question

I recently installed R2016a after having to replace my hard drive. Since then, every plot I draw comes out with what at first glance appear to be black lines, but on closer inspection appear to have a slight color gradient on them

For example, the following code:

    x = linspace(0,2*pi,100);
    y = sin(x);
    figure
    plot(x,y)

generates the following figure:

This happens when I plot multiple series, too – even if I try and override the default color order. Legends display the correct colors, but the data series in the figure don't. The following image uses this color order command:

set(gcf,'DefaultAxesColorOrder', [0 0 1; 1 0 0; 0 0.5 0; 0 0.75 0])

Both of these worked correctly on older versions of MATLAB, including most recently R2015b (on the old hard drive on this computer).

I can't find anything in the Preferences dialogue that would affect this. Can anyone offer any advice on how to fix it? I have a conference coming up, and I need to make these figures presentable.

Answer 1

MATLAB support helped to fix the the problem, if not understand the cause. Running the command

opengl software

fixes it, and plots display normally.