how to rectify stem function error?

n={-5,-4,-3,-2,-1,0,1,2,3,4,5};

u_n={0,0,0,0,0,1,1,1,1,1,1};

stem(n,u_n);

xlabel('time sample');

ylabel('amplitude');

Error: using stem (line 40)

Input arguments must be numeric, datetime, duration or categorical.

how to rectify this error?

Answer 1

[Walter Roberson]

Your {} should be []

You are not going to be able to stem() a cell array.