Change opacity of Lines

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Adi
Adi 2012-7-24
评论： Soheil 2022-5-4
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

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采纳的回答

Walter Roberson
Walter Roberson 2012-7-24
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 http://www.mathworks.com/help/techdoc/ref/patch_props.html

更多回答（1 个）

Royi Avital
Royi Avital 2017-9-29
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.
Enjoy...
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Greta Koumarianou
Greta Koumarianou 2021-10-7
this does not work on 2021a. bit of an embarassment for matlab
Soheil
Soheil 2022-5-4
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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