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Change opacity of Lines

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Adi on 24 Jul 2012
Commented: Soheil on 4 May 2022
Hello everyone
I want to change the opacity of lines I plotted in a figure in MATLAB. I read somewhere about alpha and facealpha commands but couldn't figure how to use them. Could somoene please tell me how to do this?
Regards Adi

Accepted Answer

Walter Roberson
Walter Roberson on 24 Jul 2012
It is not possible to set the transparency of lines.
The workaround is to use very thin patches instead of lines, as you can change the EdgeAlpha property for patch edges, or the FaceAlpha property of patch faces; see

More Answers (1)

Royi Avital
Royi Avital on 29 Sep 2017
In newer versions of MATLAB you can do that easily using the Color property of the line.
By default it is RGB array (1 x 3). Yet if you set it to RGBA (1 x 4) the last value is the alpha of the color.
Greta Koumarianou
Greta Koumarianou on 7 Oct 2021
this does not work on 2021a. bit of an embarassment for matlab
Soheil on 4 May 2022
The following works in R2021b (64-bit, Windows). The last value changes the transparency:
'Color',[0 0.4470 0.7410 0.1]);

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