Contour Plot to Image.jpg

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Peter
Peter 2014-12-30
编辑： Peter 2014-12-30
Hello!
I need to know how to save or export a 2D Contour plot into an Image file (preferible with .jpeg extension).
I would like also to be able to specify the output location (the folder where the image will be saved), I have tried with this:
contourf(xx,yy,turbul_interp);
xlabel('AXIS X')
ylabel('AXIS Y')
hgsave('name_of_my_image');
But then it appears the following error message:
??? Error using ==> save
Unable to write file name_of_my_image.fig: permission denied.
Any idea about how to do it?. Thanks!
  2 个评论
Geoff Hayes
Geoff Hayes 2014-12-30
Peter - do you have write permissions in the folder where you are trying to create the file? Try specifying the folder name as well...
Peter
Peter 2014-12-30
Thank you Geoff,
In fact i am not specifying any folder, so i do not understand why some permission is denied. I have permission to save everywhere in my PC.
I think that what i want to do is simple, i just want to plot a contour and save it automatically in a folder.
It should be quite easy, just adding some lines to the script to save the contour plot generated as an image.jpg somewhare in my PC . But i am trying and i do not get it...

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采纳的回答

Image Analyst
Image Analyst 2014-12-30
I would not use jpg format. I never create JPEG images. JPEG can/will degrade your image. Use PNG instead.
What does this report in the command window if you call it just before hgsave:
pwd
You probably can't save to that folder.
Anyway, even if you get that solved, I'd take a look at the FAQ: http://matlab.wikia.com/wiki/FAQ#How_do_I_save_my_figure.2C_axes.2C_or_image.3F_I.27m_having_trouble_with_the_built_in_MATLAB_functions.
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Sean de Wolski
Sean de Wolski 2014-12-30
To be fair, in R2014b and newer, I'm not all that convinced that it's necessary. Print has gotten a lot better.
Peter
Peter 2014-12-30
编辑：Peter 2014-12-30
Okey, thank you very much to you all.
I finally made it this way:
name = '0050';
fpath = 'C:\Path1\Path2...';
saveas(gca, fullfile(fpath, name), 'png');
And it Worked!!
Anyway i will download export_fig and play with it for a while.
Thanks!

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更多回答（1 个）

Sean de Wolski
Sean de Wolski 2014-12-30
You need to save it somewhere else or have write-permissions for that directory. You could change the directory settings, or run MATLAB as an admin (on Windows right-click the icon, run as admin).

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