MATLAB: How to find value on a curve for different x

curvetracing

function [x y]=inputp
y=[0.13 0.31 0.45 0.59 0.70 0.79 0.85 0.92 0.97 1];
x=0.1:0.1:1;
plot(x,y,'-')
xlim([0 1]);
ylim([0 1]);
I plot a curve from above code. Now i wanna find the value of y for x=0.22 or x=0.15 etc. so how to find these values like finding any coordinate on ploted curve?not for particular this curve for any spline curve.

Best Answer

% 

y=[0.13 0.31 0.45 0.59 0.70 0.79 0.85 0.92 0.97 1];
x=0.1:0.1:1;
plot(x,y,'-')
% xlim([0 1]);
% 
% ylim([0 1]);
xi =0.01 ;
yi = interp1(x,y,xi,'spline') ;
hold on
plot(xi,yi,'*r')
Read about interp1
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