how to delete all the elements from the matrix?

i want to delete all the elements from the matrix, and make the matrix empty.

[Walter Roberson]

What data type is the matrix? Should the empty matrix have the same data type?

Answer 1

[Chandrasekhar]

a = [1 2;3 4]

to make this matrix empty.then
a = [];

Answer 2

[RAGHAVENDRA]

Are you trying to make the matrix as null matrix or want to replace the elements with zeros(erasing the values). In the former case just use A=[];

Answer 3

[Jos (10584)]

Several options, depending on the desired result (same class, for instance):

A = []
A(:) = []
A = zeros(0,0,class(A))