How to delete row from matrix, which has values 0 and 4?

I have a matrix:

u =

     0     0     4
     0     3     0
     0     3     4
     2     0     0
     2     0     4
     2     3     0
     2     3     4

I need to delete a row which has value 4 and other values equal to 0.

So, my result should delete the first row, where [0 0 4]. How Can I do?

I did this code below, but it doesn't work.

 d=length(u);
 if u(1:d,:)==0 & u(1:d,:)==4
u(1:d,:) = []
end

Could anyone help me?

Answer 1

[Stephen23]

u = [...
    0     0     4
    0     3     0
    0     3     4
    2     0     0
    2     0     4
    2     3     0
    2     3     4]
idx = all(u==0 | u==4, 2)
out = u(~idx,:)

[Stephen23]

Addendum: if you need to check that in any row exactly one element has the value four, and all remaining elements have the value zero, then this will work:

 idx = size(u,2)-1==sum(u==0,2) & 1==sum(u==4,2)