How can I find the interpolation error when I use INTERP in the Signal Processing Toolbox?
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I was wondering if there was a way to calculate interpolation error when using INTERP in the Signal Processing Toolbox.
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MathWorks Support Team
el 27 de Jun. de 2009
One way to find the interpolation error given the following:
t = 0:0.001:1; % Time vector
x = sin(2*pi*30*t) + sin(2*pi*60*t);
r = 4;
y = interp(x,r);
is to use:
e = x - y(1:r:end);
"e" is the difference between the original data, "x", and the interpolated data, "y", at the original discrete times.
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