Save a plot to a graphics format file

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Julián Francisco
Julián Francisco am 16 Nov. 2011
Kommentiert: Image Analyst am 25 Mär. 2018
I am designed the following GUI where there are an axes. I want to save the plot drawn inside them to a graphics format file. However, the file obtained is an image of the overall figure window. This is my code:
X = 0:pi/100:2*pi;
Y = sin(X);
fh = figure;
Pan1 = uipanel(fh,'Units','normalized','Position',[0 0 0.5 1],'title',...
'Panel1');
Pan2 = uipanel(fh,'Units','normalized','Position',[0.5 0 0.5 1],'title',...
'Panel2');
haxes = axes('Parent',Pan2,'Units', 'normalized','Position',...
[0.25 0.25 0.5 0.5]);
hplot = plot(haxes,X,Y);
FileName = uiputfile('*.bmp;*.png;*.jpg;*.tif','Save as');
saveas(hplot,FileName);
  3 Kommentare
Anil Kumar
Anil Kumar am 25 Mär. 2018
Thank you norhan Mohamed..I could solve my issue with your code
Image Analyst
Image Analyst am 25 Mär. 2018
I should have warned of this earlier. Beware of using norhan's code. It only works if there is no scaling/zooming/fitting of the image to the axes. To illustrate that, just run this code:
rgbImage = imread('C:\Program Files\MATLAB\R2018a\toolbox\images\imdata\concordaerial.png');
imshow(rgbImage);
size(rgbImage)
A = getframe(gca)
You'll see
Warning: Image is too big to fit on screen; displaying at 33%
> In images.internal.initSize (line 71)
In imshow (line 336)
In test5 (line 10)
ans =
2036 3060 3
A =
struct with fields:
cdata: [679×1020×3 uint8]
colormap: []
Note how the size goes from 2036x3060 to 679x1020?
So A.cdata is not the same size as the original image!
It is the displayed size.

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Image Analyst
Image Analyst am 16 Nov. 2011
Ah yes, finally our daily "how do I save a figure?" question. Please refer to 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. where you'll see reference to the most downloaded File Exchange submission, export_fig(). Just use that and simplify your life. Braving it alone with low level MATLAB code is not for the faint of heart or novices, and often causes problems as you now have seen.
  1 Kommentar
Julián Francisco
Julián Francisco am 16 Nov. 2011
@Image Analyst: Thank you so much for your answer.

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Weitere Antworten (1)

Ben
Ben am 16 Nov. 2011
Most easy way is to make a print:
print( h, '-djpeg', 'test.jpg');
It will print the current view of the plot to your workspace....
  1 Kommentar
Julián Francisco
Julián Francisco am 16 Nov. 2011
@Ben: Thank you for your answer. However, I have tried it adding
print(hplot,'-djpeg',FileName);
to my code but it does not work.

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