Vectorizing Nested Loops

These functions allow you to vectorize three and four grid-lines that are used in nested for-loops.

These functions allow you to vectorize three and four grid-lines that are used in nested for-loops. This allows you to reduce the number of of loops to one.
Example:
x = (1:1:2);
y = (3:1:4);
z = (5:1:6);
for i=1:length(x)
for k=1:length(y)
for l=1:length(z)
Value(i,j,k) = i+3*j/k;
end
end
end
GRID = grid3(x,y,z);
for i=1:length(GRID)
Value(i) = GRID(i,1)+3*GRID(i,2)/GRID(i,3);
end