If you have Matlab and Adobe CS, I'd say save the figure as EPS and let Illustrator extract the data. Sturla On 29.08.2012 20:16, Nils Wagner wrote:

Hi all,

I have received a Matlab figure stored in a matlab file. How can I extract the curves from the file ?

Cheers, Nils

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On Wed, Aug 29, 2012 at 1:16 PM, Nils Wagner <nils106@googlemail.com> wrote:

Hi all,

I have received a Matlab figure stored in a matlab file. How can I extract the curves from the file ?

I guess it depends on what exactly you mean by "figure stored in a matlab file". I assume you mean save as fig-format; after I fiddling around for a bit, I find that this seems to work:

From MATLAB:

...

x = sqrt(1:9); plot(x) saveas(gcf(), 'test.fig', 'fig') version ans = 7.9.0.529 (R2009b)

SciPy: In [11]: from scipy.io.matlab import loadmat In [12]: m = loadmat('test.fig') In [13]: m.keys() Out[13]: ['hgS_070000', '__version__', '__header__', '__globals__'] In [15]: m['hgS_070000']['children'].item()['children'].item()['properties'].item()['XData'].item() Out[15]: array([[1, 2, 3, 4, 5, 6, 7, 8, 9]], dtype=uint8) In [16]: m['hgS_070000']['children'].item()['children'].item()['properties'].item()['YData'].item() Out[16]: array([[ 1. , 1.41421356, 1.73205081, 2. , 2.23606798, 2.44948974, 2.64575131, 2.82842712, 3. ]]) In [17]: np.version.version Out[17]: '1.6.1' In [18]: scipy.version.version Out[18]: '0.9.0' I have no idea where the key name 'hgS_070000' comes from, but it should be obvious to find if the figure is the only thing saved in the file, since it would be the only variable. The rest of the syntax crawling through the data structure matches how the figure is built in MATLAB. Meaning, if you load it back, you would have done the same thing in MATLAB like so: (Note I renamed it to test.mat to get MATLAB to reload it here)

...

m = load('test.mat') m.hgS_070000.children.children.properties.XData ans = 1 2 3 4 5 6 7 8 9

...

m.hgS_070000.children.children.properties.YData ans = Columns 1 through 8 1.0000 1.4142 1.7321 2.0000 2.2361 2.4495 2.6458 2.8284 Column 9 3.0000

If you reloaded it via the GUI load figure, and it is in figure #2, then it would have been:

...

get(get(get(2,'Children'),'Children'),'XData') etc...

Cheers, Aronne