make an array of 4 columns where the columns are x, t_an, t_nu, and t_nl, respectively and assign to variable xt_all in matlab

To make an array of 4 columns where the columns are x, t_an, t_nu, and t_nl respectively, and assign it to the variable xt_all, you can follow the following code snippet:

main.m
% create sample data for x, t_an, t_nu, and t_nl
x = [1; 2; 3; 4; 5];
t_an = [10; 20; 30; 40; 50];
t_nu = [11; 22; 33; 44; 55];
t_nl = [12; 24; 36; 48; 60];
% horizontally concatenate x, t_an, t_nu, and t_nl to create 2D matrix
xt_all = [x, t_an, t_nu, t_nl];
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This will create a 2D matrix xt_all with dimensions [5 x 4], where the first column is x, the second column is t_an, the third column is t_nu, and the fourth column is t_nl. You can change the sample data as per your requirements.