If I start with the following two arrays
x0 = 1:100;
y0 = 1:80;
z0 = 1:100;
and I make a mesh grid with them
[X0, Y0, Z0] = meshgrid(x0, y0, z0);
Now if I plug in x0 into interp and use a factor of 2 I get
xw = interp(x0,2);
Doing the same but with interp3 I expect to get a 160 x 200 x 200 array instead I get
Xw = interp3(X0,2);
317 397 397
which is just 3 less than an additional factor of 2.
Why is that and how can I correct that?
I have some flow data that is in an N x M x P array A
M = length(x0);
N = length(y0);
P = length(z0);
80 100 100
using these numbers. I want to interpolate the 3D data onto a finer mesh rN x rM x rP where r is some integer >= 2. Can I do this with interp3 or do I need to use something else?