Error using symfun>validateArgNames (line 333) Second argument must be a scalar or vector of unique symbolic variables.

What can I do? Please ur help!

close all
clc
clear

syms x y;
x= (-13:13);
y =symfun( x + exp(x), x);

figure(1)
fplot(x,y)
grid on

That code give me an Error like

Error using symfun>validateArgNames (line 333)
Second argument must be a scalar or vector of unique
symbolic variables.

Error in symfun (line 78)
            y.vars = validateArgNames(inputs);

Error in coba_ae (line 7)
y =symfun( x + exp(x), x);

Answer 1

[Mischa Kim]

Hi Ahmed, almost there:

syms x y
y = symfun(x + exp(x),x);
figure(1)
fplot(y,[-13,13])
grid on

In your code you declare x to be a nummeric vector, however, to create the symbolic function y it needs to be a symbolic variable.

[Ahmad Nur Hasybi]

That works! Thank you!