i want to read only non zero numerical from the matrix

a=[0 0 0 0 0 0 0 0 0 0 1 2 3 4 5 6 7 0 0 0]
a(1,11:17)

then it will display

1 2 3 4 5 6 7

is there any code to read non zero numerical automatically

Answer 1

[David]

To get the non-zero elements

a(a~=0)

Be careful with the comparison of floats/doubles (some zeros may just be very very small (if there are the result of a calculation) so it may be best to have a compare function:

tol = 1000*sqrt(eps);
cmpTol = @(x) abs(x)<tol;

and do something like

a(~cmpTol(a))

Answer 2

[Walter Roberson]

http://www.mathworks.com/help/techdoc/ref/nonzeros.html