Error 'Function definition not supported in this context. Create functions in code file.'

1 次查看（过去 30 天）

显示更早的评论

Mhahida Baksh 2020-4-23

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/520109-error-function-definition-not-supported-in-this-context-create-functions-in-code-file

评论： Mubbara Muhammad Saleem Sheikh 2022-1-29

Trying to do : function nrm = fournorm(x) for a question

But it comes up with Error: Function definition not supported in this context. Create functions in code file.

5 个评论
显示 3更早的评论隐藏 3更早的评论

Mhahida Baksh 2020-4-23

Im trying to solve a maths question and this is what it tells me to do as the first step:

function nrm = fournorm(x) % find the four-norm of the vector x

Stephen23 2020-4-23

"...this is what it tells me to do as the first step:"

You need to write that code in a file and save the file using the same name as the function, i.e. fournorm.m.

In MATLAB it is not possible to define functions like that in the command window.

请先登录，再进行评论。

请先登录，再回答此问题。

回答（2 个）

Srivardhan Gadila 2020-4-29

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/520109-error-function-definition-not-supported-in-this-context-create-functions-in-code-file#answer_429149

在 MATLAB Online 中打开

You have to create functions in files, refer to Create Functions in Files, Add Functions to Scripts & Functions.

If you have simpler functions like

function y = cubicPoly(x)
y = x.^3 + x.^2 + x + 1; 
end

then you can make use of function_handle and define such functions in command window itself or in a script as follows:

f = @(x) x.^3 + x.^2 + x + 1;

To be clearer, you cannot define a function simply by copying and pasting the code starting with the function keyword at the prompt in the MATLAB Command Window. The function keyword is only allowed inside a script, function, or class file.

请先登录，再进行评论。

Mubbara Muhammad Saleem Sheikh 2021-5-16

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/520109-error-function-definition-not-supported-in-this-context-create-functions-in-code-file#answer_701158

编辑：Rik 2021-10-7

在 MATLAB Online 中打开

function move=tictac(n).         %first computer move in tic-tac-toe. %go for the centre if empty. %otherwise choose the upper left corner.                              if n=5                                  move=5;                            else                              move=1                                end
(Can anyone help me with this.can u tell me why matlab software shows Error: Function definition are not
supported in this context. Functions
can only be created as local or nested
functions in code files.