problem when saving plot

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Calvin Cheung
Calvin Cheung 2015-1-5
评论： Joseph Powe 2020-3-16
Hi there,
I have created a pcolor plot and it can display without any problem. e.g.
f = figure(); h = pcolor(lon, lat, K); set(h,'edgecolor','none');
It has no problem to display on screen, then I save it into file
print('pcolorplot.jpg')
It appears that no content on the plotting area. I tried to print it in PDF, too, but none of these action work.
Attached the screen display and the save files.
Regards,
Calvin

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回答（4 个）

Chad Greene
Chad Greene 2015-1-6
编辑：Chad Greene 2015-1-6
Try specifying a different renderer with set(gcf,'renderer','opengl'), and if that doesn't work, set(gcf,'renderer','painters') and when you use print include the -painters or -opengl option. And/or use export_fig.
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Calvin Cheung
Calvin Cheung 2015-1-7
Thanks! the set(gcf,'renderer','painters') work and I can save the figure. I also tried other renderer options such as 'opengl' and 'zbuffer' but none of them work for this figure.
Jorge Bosch
Jorge Bosch 2018-7-3
That worked for me too, but using saveas, not export_fig

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Jorge
Jorge 2015-1-5
Hi! Have you tried using the _saveas() command? Sintax is saveas(figure_handle,'filename.ext') Hope it helps!
  1 个评论
Calvin Cheung
Calvin Cheung 2015-1-6
I tried and save figure as jpg and the first figure was okay, but then when I try save it again, no matter I plot it again or just save the current future to other format such as png or pdf, error occur. Is that a memory issue? seem strange since I am using cluster to run matlab control by my desktop using linux.

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Image Analyst
Image Analyst 2015-1-7
Why are you using pcolor() instead of imshow()? Did you know pcolor drops off one row and one column? Here's proof:
m = magic(4) % Make 4 by 4 matrix
pcolor(m); % Display 4 by 4 matrix.
colormap(jet(16));
colorbar
  2 个评论
Calvin Cheung
Calvin Cheung 2015-1-7
Thanks for your comments, the problem is my X and Y are not uniform, for example, the upper point would be (5,5), but lower point would be (4.1,3.9). Can I still use imshow in this situation??
Image Analyst
Image Analyst 2015-1-7
Not sure about non-linearity. This is what it says about one of its inputs:
'Xdata' — X-axis limits of nondefault spatial coordinate system
two-element vector
X-axis limits of nondefault coordinate system, specified as a two-element vector. This argument establishes a nondefault spatial coordinate system by specifying the image XData. The value can have more than two elements, but imshow uses only the first and last elements.
Example: 'Xdata',[100 200]
Data Types: single | double | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 |
So it looks like it has to be linear, though it can be linear differently in the x and y direction. Though going from 5 to 4.1 can be linear, but it can also be non-linear if the halfway point is not 4.5 but something different like 4.2 or 4.9 or something. Not sure what you have - if it's truly non-linear or if it's just linear but different factors of linear in the x and y direction.

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Joseph Powe
Joseph Powe 2020-3-16
I can display a color figure on the screen, but when I try to print using the print function using '-dpdf', it comes out black & white.
  1 个评论
Joseph Powe
Joseph Powe 2020-3-16
Never mind, solved it. Didn't notice default was gray scale.

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