Data extract from graph.

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Vikas Vasudevan
Vikas Vasudevan 2019-6-26
回答： Walter Roberson 2019-6-26
I have a plot I created in matlab using excel data. I would like my code to provide a Y value for the X value that I provide. Is this possible? Please note that i cannot look for the Y value, the code should automatically assign the Y value from the graph for provided X value.
Thanks for the Help.

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Walter Roberson
Walter Roberson 2019-6-26
Providing that x is monotonic:
h = findobj(gca, '-property', 'XData');
hx = h.XData;
hy = h.YData;
[shx, idx] = sort(hx);
shy = hy(hx);
corresponding_y = interp1(shx, shy, given_x);

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