saveas to pdf but get a blank

Question

Yuqing_noob 2023-3-21

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https://ww2.mathworks.cn/matlabcentral/answers/1932920-saveas-to-pdf-but-get-a-blank

评论： Anton Kogios 2023-3-30

Hi,

I want to draw a 2-D curve with a gradient color and I found a tutorial from: https://stackoverflow.com/questions/31685078/change-color-of-2d-plot-line-depending-on-3rd-value . It works but I found I can not save the figure to pdf (I will get a blank).

The following is the code copy from the tutorial and tha last two lines is my code to save the figure:

figure;
n = 100;
x = linspace(-10,10,n); y = x.^2;
p = plot(x,y,'r', 'LineWidth',5);
%// modified jet-colormap
cd = [uint8(jet(n)*255) uint8(ones(n,1))].'; %'
drawnow
set(p.Edge, 'ColorBinding','interpolated', 'ColorData',cd)
%save figure
saveas(gcf,['test_V4.tiff'])
saveas(gcf,['test_V4.pdf'])

Any ideas of how to approach this? I did not use surface function because It looks strange in the curved turns after zoom out.

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Anton Kogios 2023-3-23

在 MATLAB Online 中打开

Interesting problem which I couldn't solve - the source of the issue seems to be changing the ColorBinding and exporting as a vectorised graphic.

Is a high-resolution image good enough for you? It's not vectorised but:

exportgraphics(h,'test_V4.pdf','ContentType','image','Resolution',600)

Yuqing_noob 2023-3-23

Hi Anton, thanks! Your are right, exportgraphics is a useful function. Currently I saved the figure in this way, and it works well! But I think a vectorised graphic is what I need. haha I think I can always use for loop to plot the gradient color if I can not solve this problem.

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Answer 1

Raghunathraju 2023-3-30

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Hi Yuqing,

I understand that you are unable to save the figure to pdf using ‘saveas’ option. Instead, you can try print option or Ctrl+p to print the figure and save it as PDF.