Interpolation Question Regarding Value Alignment

I have 2 sets of data, both dependent on time. Y has about 300 measurements each spaced 4 seconds apart (one at .4, one at .8, etc), while X has about 100 measurements each spaced 3 seconds apart. How can I interpolate the measurements from Y to give me 100 Y values spaced 3 seconds apart (so they match up with the timing of X)

Answer 1

[KSSV]

Let t be your 4 seconds sampled time and y be your respective data.

dt = 3 ; 
ti = min(t):dt:max(t) ;
yi = interp1(t,y,ti) ;