Save a plot to a graphics format file

1 次查看（过去 30 天）
Julián Francisco
Julián Francisco 2011-11-16
评论： Image Analyst 2018-3-25
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 个评论
显示 1更早的评论
Anil Kumar
Anil Kumar 2018-3-25
Thank you norhan Mohamed..I could solve my issue with your code
Image Analyst
Image Analyst 2018-3-25
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.

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Image Analyst
Image Analyst 2011-11-16
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.

更多回答（1 个）

Ben
Ben 2011-11-16
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 个评论
Julián Francisco
Julián Francisco 2011-11-16
@Ben: Thank you for your answer. However, I have tried it adding
print(hplot,'-djpeg',FileName);
to my code but it does not work.

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Printing and Saving 的更多信息

标签

产品

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by