How to exract data from a figure and insert x and y values into a .mat file ?

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Hello everyone, i have a discrete plot figure , which shows the generated packet size over time , i want to see the x and y values in .mat file i use that
x = get(gco,'xdata')
y = get(gco,'ydata')
now i have the x and y values(200 per each), but i wanna have a .mat file 200x2 that shows x and and its corresponding y in the same row, Can anyone help please? Thank you so much in advance!

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emehmetcik
emehmetcik il 18 Feb 2015
z = [x(:), y(:)];
save('MatFileName', 'z')

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