exctract data from 50 curves in .fig

I have a x-y plot including almost 50 curves.

I can extract the data for the single curve, but I get error if I use the 'for '. Indeed the final file is a collection of zeros

clear all;

close all;

clc;

fig=openfig('*.fig');

for i=1:50

dataObjsY = findobj(fig,'-property','YData');

yi = dataObjsY(i).YData;

dataObjsX = findobj(fig,'-property','XData');

xi= dataObjsX(i).XData;

A=[];

A(:,i)=xi;

A(:,i)=yi;

dlmwrite('datatoday.txt',A,',');

end

Answer 1

[Star Strider]

The argument to openfig should be a single .fig file, so supply the appropriate information for ‘filename’ here.

Other than that, this should work —

fig=openfig('filename.fig');
Ax = gca;
Lines = findobj(gca, 'Type','Line');
for k=1:numel(Lines)
    xv{k} = Lines{k}.XData;
    yv{k} = Lines{k}.YData;
end

Assigning them to cell array elements is necessary because they may not all be differnt sizes or orientatioons.

Make appropriate changes to work with your files.

.

[SCIUSCIA]

Thank you.

I tried to run it, but it seems that there is a problem

Brace indexing is not supported for variables of this type.

Error in multiextract (line 8)

xv{k} = Lines{k}.XData;

[Star Strider]

I copied that (apparently incorrectly) from my archived code.

Try this instead —

fig=openfig('filename.fig');
Ax = gca;
Lines = findobj(gca, 'Type','Line');
for k=1:numel(Lines)
    xv{k,:} = Lines(k).XData;
    yv{k,:} = Lines(k).YData;
end

.

[SCIUSCIA]

yes, it runs now. resolved. thank you

[Star Strider]

My pleasure!

If my Answer helped you solve your problem, please Accept it!

.