Increasing transparency of plotted line, fading out

Dear all,

I would like a plotted line to change from black to invisible (gradually from x = 1 to x = end). I do know how to change the alpha or color of a line, but not how it can be done gradually. Help is appreciated,

Kind regards,

stijn

[mounika]

https://in.mathworks.com/matlabcentral/answers/107725-how-can-i-change-the-line-colour-manually-like-i-want-to-change-a-line-colour-at-some-point-white?s_tid=answers_rc1-2_p2_MLT

Answer 1

[Vikram Mohan]

Hi Stijn,

For your workflow, one suggestion would be to use a patch object to plot the line. By doing so, one can set the "FaceVertextAlphaData" property of a patch object that would control transparency for an array of faces or vertices. For your case , you must specify the "FaceVertexAlphaData" property as a vector containing one transparency value per vertex gradually going from 1 (Opaque) to 0 (invisible). Caution: The length of the transparency data vector should match x.

The below link would give you more information of setting the "FaceVertexAlphaData" for a patch object that would create a line with interpolated transparency.

https://www.mathworks.com/help/matlab/visualize/add-transparency-to-graphics-objects.html?s_tid=answers_rc2-2_p5_MLT

[Adam Danz]

Note that FaceAlpha must also be set to 'interp'. The AlphaDataMapping propery may also be needed depending on the scale of your alpha values.