Different output figure by export_fig and save function in gui

Hi there, I used aDot.MarkerHandle.FaceColorData = uint8(255*[LineColor(g,:) 0.5]') to change the alpha value of the plot. The figure should looks like this

but if I use export_fig, print or saveas function, the output color becomes like this

though by press the save button in file menu the transparent color is correct, the resolution is poor. Can some one help me to solve this problem??

Thanks, Heather.

[Walter Roberson]

That does not FaceColorData does not sound like Alpha data to me?

Are you using http://www.mathworks.com/matlabcentral/fileexchange/47701-transparentscatter ?

[ChihChin Hsu]

http://undocumentedmatlab.com/blog/plot-markers-transparency-and-color-gradient

I follow the steps from the web page.

I feel confused that the figure widow is correct, how come the output image is incorrect??

Answer 1

[Yair Altman]

export_fig, print and saveas only support foreground transparency in export to PNG files, and then only for patches. Read export_fig's documentation for details.

Even so, the techniques I mentioned in UndocumentedMatlab for achieving on-screen marker and line transparency do not work when exporting, to any format, because the plot gets reset by the print command (which is used by export_fig) in preparation for printing.

Instead of the above, I suggest that you use the ScreenCapture utility, which does not rely on the print function.

Answer 2

[Jan]

Do you create an EPS file? Then the answer is easy: EPS does not support transparency.

[ChihChin Hsu]

I don't think so. As you can see in the figure, they all have transparent part near the curve.