Help using interp1 to resample data

Hi,

I have a series of data that spans 202 points. I want to resample it down to 172 points. Im using the interp1 function as:

data2(:,1) = interp1( [1:1:202] , data(:,1), [1:1:172] ,'spline') ;

But when I do this, data2 just returns the first 172 values of data. How do i actually get it to resample the entire data series to 172 points.

Thanks

Answer 1

[Star Strider]

I am not certain what you want to do, but this may work:

data = [1:202]';                    % Create Data
xi = linspace(1,202,172);           % Interpolation Vector

data2(:,1) = interp1( [1:1:202] , data(:,1), xi ,'spline') ;