[octave ] octave zeros function

Built-in Function: zeros (n)
Built-in Function: zeros (m, n)
Built-in Function: zeros (m, n, k, …)
Built-in Function: zeros ([m n …])
Built-in Function: zeros (…, class)

    Return a matrix or N-dimensional array whose elements are all 0.

    If invoked with a single scalar integer argument, return a square NxN matrix.

    If invoked with two or more scalar integer arguments, or a vector of integer values, return an array with the given dimensions.

    The optional argument class specifies the class of the return array and defaults to double. For example:

    val = zeros (m,n, "uint8")


a=[1, 2, 33;4 ,5, 6; 7 ,8, 66;55 ,476, 22]
a =

     1     2    33
     4     5     6
     7     8    66
    55   476    22

[rows columns]=size(a);
rows =  4
columns =  3

zeros (rows,columns, "uint8")

ans =

  0  0  0
  0  0  0
  0  0  0
  0  0  0


zeros(4) # will give you 4x4 matrix
ans =

   0   0   0   0
   0   0   0   0
   0   0   0   0
   0   0   0   0


zeros(4,1) #want a 4x1 zero vector
ans =

   0
   0
   0
   0