MATLAB: Get a value of non existant index of array by interpolation

arrayinterpolationMATLAB

Im trying to remember a function in Matlab which returns a value of non existant index of array by interpolation.
eg:
arry = [4 5 6];
index = 1.5;
suchfunction(arry,index) %should return a value between the index 1 and 2 by interpolation (would be 4.5)
ans = 4.5
Could someone help me!?

Best Answer

  • Use the interp1 function:
    arry = [4 5 6];
    idx = 1:3;
    idxi = 1.5;
    arryi = interp1(idx, arry, idxi)
    arryi =
    4.5