# Finding contour level for given x,y coordinate

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mukesh bisht el 23 de Ag. de 2021
Respondida: DGM el 23 de Ag. de 2021
Hi, I have a contour plot of velocity field. Now, I want to obtain velocity value from the contour plot for any given [X,Y] coordinate. How can i obtain this? Please help
Attached contour plot (x axis horizontal)
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DGM el 23 de Ag. de 2021
Well, you already have the velocity data, so this shouldn't depend on the plot at all.
You can interpolate something like this:
% x and y values can't directly be used as subscripts
x = -50:50;
y = x;
v = peaks(101);
querypoint = [12.3 -17.7] % query point does not need to be integer-valued
querypoint = 1×2
12.3000 -17.7000
vint = interp2(x,y,v,querypoint(1),querypoint(2),'bilinear')
vint = -1.9433
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