How do i fix that code

switch nargin

case 0

error(message('MATLAB:minrhs'));

case 1

S.s = tomupad(x);

Error using sym (line 212)

Not enough input arguments

Answer 1

[Steven Lord]

When you call the sym function you must call it with at least one input argument. The Syntax section on that documentation page does not list a zero input calling syntax. Based on the error message you are calling it with no input arguments.