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

19 次查看（过去 30 天）
Ahmad Nur Hasybi
Ahmad Nur Hasybi 2020-12-26
评论： Ahmad Nur Hasybi 2020-12-27
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);

请先登录，再回答此问题。

采纳的回答

Mischa Kim
Mischa Kim 2020-12-26
编辑：Mischa Kim 2020-12-26
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.

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Symbolic Variables, Expressions, Functions, and Preferences 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by