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stem plot line width inconsitencies

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dormant
dormant on 19 Oct 2023
Commented: Voss on 25 Oct 2023
I can't understand why I can't set the line width consistently with the stem plot.
I am plotting four subplots in a loop and this is the relevant bit of the code:
for ista = 1:nsta
[stuff here]
subplot(nsta,1,ista);
stem( datimAuto, triggersAuto, 'r', 'Marker', 'none', 'LineWidth', 2.0 );
xlabel( 'Date' );
title( sta );
xlim( [plotBeg plotEnd] );
grid on;
[stuff here]
end
In the resulting plot, the second subplot has thicker lines. This has less data than the other three, but I don't see why that would affect it.
Any ideas?
  1 Comment
Adam Danz
Adam Danz on 19 Oct 2023
If you save the figure and attach the .fig file, I'd be happy to look into it.

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Accepted Answer

Voss
Voss on 19 Oct 2023
Seems like a renderer issue. You can try switching to the 'painters' renderer. You can see in the tests below that only the 'painters' renderer draws the lines with the same apparent thickness.
data1 = 400*rand(1,150);
data2 = 1000*rand(1,300);
renderers = {'opengl','zbuffer','painters'};
for ii = 1:numel(renderers)
f = figure('Position',[1 1 1200 600],'Renderer',renderers{ii});
subplot(2,1,1)
stem(151:300,data1,'r','Marker','none','LineWidth',2.0)
xlim([1 300])
title(sprintf('''%s'' Renderer',renderers{ii}))
subplot(2,1,2)
stem(1:300,data2,'r','Marker','none','LineWidth',2.0)
xlim([1 300])
end
  2 Comments
dormant
dormant on 25 Oct 2023
Edited: dormant on 25 Oct 2023
Thanks. You were right. Painters works.
But for how long? This warning message is a bit vague!
Voss
Voss on 25 Oct 2023
Glad it's working. I don't know what The Mathworks future plans are for figure Renderers (just never upgrade your MATLAB version and this will continue to work!).

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