Join elements of an array

If I have two array

a=[1 2 3 0]
b=[0 0 5 4]

and I want the array c=[1 2 3 4] How should I proceed?

In other words I want a array c in which the element of array a==0 is replaced with the element of matrix b.

[Image Analyst]

What happened to the 5? Why did you leave that out of c?

Answer 1

[Azzi Abdelmalek]

a=[1 2 3 0]
b=[0 0 5 4]
idx=a==0
bb=sort(nonzeros(b))
a(idx)=bb(1:sum(idx))

[fede]

mmmm but if i want a general formula? I have two arrays of prices.

a=[p1 p2 p3 0 0 0  ....]
b=[0 0 p3 p4 p5 0 0....]

and I want join the two arrays to obtain a array c in which I have

c=[p1 p2 p3 p4 p5]

[Azzi Abdelmalek]

Have you tried my code?