controlling array data when calculating

im try to avoiding having a w = 0. how do i code this?

a = 10;
w = -a:(a/1000):a
F = 2*sin(a*w)./w;

Answer 1

[Image Analyst]

Another way is to just delete the element where w=0:

w(w==0) = [];

Answer 2

[Azzi Abdelmalek]

a = 10;
w = -a:a/1000:a;
F = 2*sin(a*w)./w; 
tol=0.01
idx=find(abs(F)<tol)

[w(idx)' F(idx)']

Answer 3

[Roger Stafford]

 w = -a:(a/1000.5):a;