intdec

Fs1 = 10000;               // initial sampling frequency
Fs2 = 14000;               // targeted resampling frequency
t1 = (0:1/Fs1:5)';
t2 = (0:1/Fs2:5)';
F0 = 2;                    // Signal frequency
u1 = sin(2*%pi*F0*t1);
u2 = sin(2*%pi*F0*t2);     // Direct sampling at targeted frequency (as reference)
u2b = intdec(u1, Fs2/Fs1); // Resampled signal
clf
plot(t2,u2,"b", t2,(u2b-u2)*1000, "r");
legend("Direct highly sampled u2","(resampled_u1 - u2) x 1000","in_upper_left");