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# Extracting values from a plot

## Extracting values from a plot

(OP)
Hi all,

Is there a way to extract values from a plot.  I have created a plot in MATLAB and would like to extract the y-value for any given x-value along the x-axis.  I have x and y data stored as arrays from a for-loop.  However, if I want to extract the y value for x=0.225 (first value along the x-axis) I need to impose y(1) instead of y(0.225).  Any thoughts?

### RE: Extracting values from a plot

check out the fetch function... i haven't used it too much but that is probably what you're looking for

### RE: Extracting values from a plot

x = .2:.025:.3;
y = x.^2;

h = plot(x,y)

px = get(h,'XData');
py = get(h,'YData');

inx = find(x == .225)

py(inx)

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