not take into account zeros in a graph

Hi,

I have to make a graph of a few points. In these points there are zeros, like [3 0 2 0 0 0 5 0 2 0 0 0 4 0 1 0 0 8]. I want to connect the positive integers, but without the line going trough the zeros. How can I manage this?

Kind Regards, Bart

Answer 1

[Andrei Bobrov]

z = [3 0 2 0 0 0 5 0 2 0 0 0 4 0 1 0 0 8]
[i1,i1] = find(z)
plot(i1,z(i1));grid on

[Bart]

Thnx, helped me. What is [il, il] doing?

[Andrei Bobrov]

index of 'z'

[Jan]

index=find(z) is sufficient, because the 2nd index is not needed.

Answer 2

[carmen]

another way is to use

z=[3 0 2 0 0 0 5 0 2 0 0 0 4 0 1 0 0 8];
z(z=0)=[] % now z == [3 2 5 2 4 1 8]
plot(z)

this codes removes the zero-valued indices, that means that the size z will decrease by the amount of zero values that were there before. however, not always this makes sense to a problem, particularly if the x-axis-spacing needs to stay unchanged.