getting the variable size value

I have a variable of size x*y .what matlab command is used to get the x value.

Answer 1

[Alex Taylor]

[R,C] = size(A);

doc size

Answer 2

[Ned Gulley]

To find the size, use size.

 [m,n] = size(X)
 m = size(X,dim)

So to find the number of rows, you can say

 numRows = size(X,1)

[ramakrishna bathini]

thanks for the reply a=size(X,1) is the command i was looking for...