extracting data series from *.fig file

Hi there,

I have a figure file, but not the original data.

Is there a way to extract the data array from the 2D plot, opened from *.fig file?

Thanks in advance,

Petr.

[shubham kumar gupta]

many a time it may happen you really get confused by varying answers non of them working

So follow this

S = load('MyFigure.fig', '-mat');

Now open S and go to children -> children -> Properties

Now search for CData, or XData, YData & ZData

you can export these variables

Answer 1

[Paulo Silva]

open data.fig %open your fig file, data is the name I gave to my file
D=get(gca,'Children'); %get the handle of the line object
XData=get(D,'XData'); %get the x data
YData=get(D,'YData'); %get the y data
Data=[XData' YData']; %join the x and y data on one array nx2
%Data=[XData;YData]; %join the x and y data on one array 2xn

[kaushal patel]

how can i get the ordinates of curve shown in figure ,can anyone give me the solution of this problem.......

[Amir]

Awesome! totally saved my time on retrieving the data. Works on 2016

[Omar Velazquez]

@Paulo Silva - You have saved my life. Many thanks

Answer 2

[Petr]

err.. tried it, it tells me

>> D=get(gca,'Children');
>> XData=get(D,'XData');
??? Error using ==> get
Invalid property found.
Object Name :  hggroup
Property Name :  'XData'.

It's MATLAB 7.10.0 (R2010a)

[Paulo Silva]

It looks like you got more things inside it than I was expecting, please do

D=get(gca,'Children'); get(D)

that will allow you to see what's there in the command line

[Paulo Silva]

D=get(gca,'Children'); Child=get(D)

Now explore the Child struct and see what's inside, to get values from there is just similar to the code I gave you.

[Joseph]

This code generated an error:

openfig(figureFile);
D = get(gca,'Children');
Child = get(D);
??? Error using ==> get
Objects must all be instances of the same class.

[Walter Roberson]

hfig = openfig(figureFile);
d = findall(hfig, '-property', 'xdata');
xydatas = arrayfun(@(h) get(h, {'xdata','ydata', 'type'}), d, 'Uniform', 0);

Now xydatas will be a cell array with one entry for each object in the plot that has an xdata property. Each of the cells will have three elements: the xdata information, the ydata information, and the name of the type of the object. Different kinds of objects might be included, depending on what was drawn in the plot.

The original question is not precise about what kind of 2D plot is present. For example, lines, surfaces, patches, and scatter plots are all 2D plots that have xdata properties.

Answer 3

[shubham kumar gupta]

https://in.mathworks.com/matlabcentral/answers/2951-extracting-data-series-from-fig-file#comment_2357085

[John Mikhail]

Most convenient answer I've found by far

Answer 4

[Petr]

Thanks, it works!

Probably, something was wrong with my file.

[Walter Roberson]

Probably not, hggroup are not uncommon for some kinds of plots. In future you could use findobj() to locate the objects that have xdata.