Different output figure by export_fig and save function in gui

Question

ChihChin Hsu 2015-10-6

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/247008-different-output-figure-by-export_fig-and-save-function-in-gui

回答： Yair Altman 2015-11-18

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.

2 个评论
显示无隐藏无

Walter Roberson 2015-10-6

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 2015-11-3

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??

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Yair Altman 2015-11-18

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/247008-different-output-figure-by-export_fig-and-save-function-in-gui#answer_200380

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.