Error in using syms

Hello.

I have a problem with syms. My MATLAB R2020b doesn't respond my syms commands. Please help me.

For example;

syms x 
e = x^2 -9
solve(e)

Results:

Error using sym

Too many input arguments.

Error in syms (line 227)

defined = sym(zeros(1, length(args)));

Error in Untitled31 (line 1)

syms x

[Walter Roberson]

What shows up for

which -all sym

I suspect that you have some other sym.m on your path.

[Emin Kursat Dogray]

Thanks for responding.

Warning: Function line has the same name as a MATLAB builtin. We suggest you rename the function to

avoid a potential name conflict.

>> Untitled91

D:\MATLAB\toolbox\symbolic\symbolic\@sym\sym.m % sym constructor

[Walter Roberson]

Please show some lines of the file D:\MATLAB\toolbox\symbolic\symbolic\@sym\sym.m

dbtype sym.m 1:5

1     classdef sym < handle
2         %SYM    Construct symbolic numbers, variables and objects.
3         %   S = SYM(A) constructs an object S, of class 'sym', from A.
4         %   If the input argument is a string, the result is a symbolic number
5         %   or variable.  If the input argument is a numeric scalar or matrix,

dbtype sym.m 199:205

199       methods
200           function S = sym(x, n, a)
201           symengine;
202           if nargin ~= 0
203               if isstring(x)
204                   if isscalar(x)
205                       if ismissing(x)

And in the meanwhile, you should track down which line and see why you have it; you could have a lot of graphics problems if you have your own line.m .

[Emin Kursat Dogray]

>> Untitled13

1 function elimination

2 n=10;

3

4

5 for i1=1:n

[Emin Kursat Dogray]

I think I accidentally overwritten the file I was working on. How can I fix?

[Walter Roberson]

If you overwrote sym.m then unless you have a backup, you will need to reinstall the Symbolic toolbox