How to reshape an matrix made from an input turned into a double value?

str= input('Please enter message here: ','s' );
n= double(str);
a= reshape(n,2,2);
encrypt = [110,2221;213,4769];
h=a*encrypt;
disp(h)

This code returns the error:

Error using reshape To RESHAPE the number of elements must not change.

Error in Luke_FLeenor_Matlab_Project (line 11) a= reshape(n,2,2);

What can I do to reshape that array?

[Walter Roberson]

Your reshape will fail unless your string has exactly 4 characters.

If you have an even number of characters, reshape(n, [], 2)

Answer 1

[Massimo Zanetti]

Your code only works for 4-characters long strings because you are reshaping them to 2x2 matrix.