Hi everyone, how can i convert a 2500x21 matrix into 2500x42 matrix by using cubic/spline interpolation.

Hi everyone, how can i convert a 2500x21 matrix into 2500x42 matrix by using cubic/spline interpolation.

Answer 1

[KSSV]

A = rand(2500,21) ;

B = zeros(2500,42) ;

for i = 1:2500
    B(i,:) = interp1(1:21,A(i,:),linspace(0,21,42),'spline') ;
end

This can be vectorised using bsxfun