Since A are of class double and the </> comparisons will produce logical values, you cannot combine them in a matrix.
Instead, here are 3 options.
Option 1: Matrix (converting logical values to double)
A = [10; 20; 30; 40; 50; 60; 70; 80; 90; 100];
B = [A, A > 50];
% Result
% B =
% 10 0
% 20 0
% 30 0
% 40 0
% 50 0
% 60 1
% 70 1
% 80 1
% 90 1
% 100 1
Option 2: Table
A = [10; 20; 30; 40; 50; 60; 70; 80; 90; 100];
T = table(A, A > 50, 'VariableNames',{'A','TF'});
% Result
% T =
% A TF
% ___ _____
%
% 10 false
% 20 false
% 30 false
% 40 false
% 50 false
% 60 true
% 70 true
% 80 true
% 90 true
% 100 true
Option 3: Cell array
A = [10; 20; 30; 40; 50; 60; 70; 80; 90; 100];
B = {A, A > 50};
% Result
% B =
% {10×1 double} {10×1 logical}
