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

To make an array of 4 rows where the rows are x, t_an, t_nu, and t_nl, respectively, and assign it to a variable xt_al, you can use the following code:

main.m
x = [1, 2, 3, 4]; % example values for x
t_an = [0.1, 0.2, 0.3, 0.4]; % example values for t_an
t_nu = [0.2, 0.3, 0.4, 0.5]; % example values for t_nu
t_nl = [0.3, 0.4, 0.5, 0.6]; % example values for t_nl

xt_al = [x; t_an; t_nu; t_nl];
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This creates four arrays for x, t_an, t_nu, and t_nl, respectively, and then combines them into a 4x4 matrix using vertical concatenation. The resulting matrix is then assigned to the variable xt_al.