how do i combine figures' y - values
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Hi, I have 57 graphs saved as figures. I want to combine all 57 graphs to make just one curve overall. I've tried copy and pasting the plots onto another graph but this just puts two functions on one graph. I've attached 3 of the graphs if someone would like to demonstrate how to do so.
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Answers (2)
Image Analyst
on 22 Nov 2015
Save the data - the numbers - not the figures themselves. Then just have a program that read in all the data, say 57 .mat files or whatever, and plot them in one axes.
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Image Analyst
on 22 Nov 2015
Well you plotted something didn't you? Let's say you plotted y
plot(y, 'b-');
Now, instead of saving the whole figure with export_fig(gcf), just save the y values:
save('file 1', 'y');
Now just do that for all 57 different things you plot. Save to 57 different files, then recall them later with load().
Thorsten
on 23 Nov 2015
Edited: Thorsten
on 23 Nov 2015
How to extract data from a fig is described in http://www.mathworks.com/matlabcentral/answers/100687-how-do-i-extract-data-from-matlab-figures
You just put it in a loop
ydata = zeros(1, 59991);
for i=1:57
open(sprintf('../../Downloads/figurefile%d.fig', i))
dataObjs = get(get(gcf, 'Children'), 'Children')
if i == 1, xdata = get(dataObjs(1), 'Xdata'); end
ydata = ydata + get(dataObjs(1), 'Ydata');
end
You see, fig files are not a good idea for data exchange. Use mat files instead. Ideally, store each ydata in a separate row of a single matrix 57x 59991 matrix P. Then just load P and use plot(sum, P).
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Star Strider
on 23 Nov 2015
That code works for R2014a and previous releases, but not for R2014b and later releases.
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