input the matrix from user

i want to find out the mean of the matrix

but the matix should be given by users in command window

y= input(a);
% mean(mean(A,1),2);

Answer 1

[Jan]

A = input('Please input the matrix like "[1, 2; 3, 4]":');
% Type e.g.:
%   [1, 2; 3, 4]
meanA = mean(A(:))

% Or in modern Matlab versions:
meanA = mean(A, 'all')

% Or more basic:
meanA = sum(A, 'all') / numel(A)

See:

doc input