# Matlab: out of bounds.

• MATLAB

## Main Question or Discussion Point

Hey, I have defined
Code:
pu = zeros(nx,ny,N);
pv = zeros(nx,ny,N);
pu(:,ny,:) = 1;
and written the loop:
line 38-40
Code:
 for i = 2:(nx-1);
for i = 2:(ny-1);
ps(i,j) = p(i,j,n) - a1*(pu(i+1,j,n) - pu(i,j,n)) -a2*(pv(i,j+1,n) - pv(i,j,n));
and I get the error
??? Attempted to access pv(2,11,1); index out of bounds because size(pv)=[10,10,10].

Error in ==> fluidmekanikk at 40
ps(i,j) = p(i,j,n) - a1*(pu(i+1,j,n) - pu(i,j,n)) -a2*(pv(i,j+1,n) - pv(i,j,n));
Could someone help me with the error?

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Hurkyl
Staff Emeritus
Gold Member
Well, obviously, you tried to access p(2,11,1) which does not exist.

Looking at the indexes, it was probably pv(i,j+1,n), since that goes highest int he middle term.

Now... what range does j iterate over?

Well, obviously, you tried to access p(2,11,1) which does not exist.

Looking at the indexes, it was probably pv(i,j+1,n), since that goes highest int he middle term.

Now... what range does j iterate over?
Thanks for fast reply and solution.
The code
Code:
for i = 2:(nx-1);
for i = 2:(ny-1);
was supposed to be
Code:
for i = 2:(nx-1);
for j = 2:(ny-1);
and I had used the j as variable earlier.

Last edited: