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

904 次查看（过去 30 天）
Agustin Foxley
Agustin Foxley 2020-1-28
编辑： Stephen23 2024-6-10
Hello,
I was trying to create a simple function on matlab, I already have a file named "AddOne.m", so it should work, however at the first line of code, matlab throws the following error
"Error: Function definition not supported in this context. Create functions in code file.". Any ideas how to sort this out?
Thanks in advance!
matlab pifiando la funcion.png
  1 个评论
Stephen23
Stephen23 2020-1-28
In MATLAB functions cannot be defined in the command window.
You appear to be running the entire function in the command window in an attempt to define that function.
You don't need to do that: just define the function in a file, and then call it. That is all you need to do.

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Deepak Gupta
Deepak Gupta 2020-5-6
Hi Augstin,
In matalb, you need to write your function in a seperate matlab file and then you can call this function either from command window or from a seperate matlab file.
For example, here you can write your matlab function addOne.m in one file. File content can be something like:
%File addOne.m
function finalAnswer = addOne(inputNumber)
finalAnswer = inputNumber+1;
end
Now you can use this function in your other matlab file or in command window. For example, you can create a seperate file to call this function.
% File testaddOne.m
inputNumber = 5;
finalAnswer = addOne(inputNumber);
disp('Thining...');
fprintf('Final Answer: %d \n', finalAnswer);
display('Done');
To avoid confusion, for now keep both files at one place. When you run file testaddOne.m, it will automatically call other file and make use of it.
Cheers.

更多回答（4 个）

kazi sharif
kazi sharif 2020-9-8
编辑：Walter Roberson 2022-2-22
function Divide_Average(a,x0,tol)
clc
if a<0
b=abs(a);
else
b=a;
%fprint(' Neagtive Number is not taken in Square root');
end
x = zeros(1,1);
fprontf('i x(i)\n');
fprintf('---------\n');
x(1)= x0; fprintf('%5.0f\t %15.5f\n',1,x(1));
i=2;
while (1)
x(i) = 0.5*(x(i-1) + a/x(i-1));
fprintf('%5.0f\t %15.5f\n',i,x(i));
RelER = (x(i) - x(i-1))/x(i-1);
if abs(RelER) <= tol, break, end
i = i + 1;
end
fprintf('\n\n Square Root of %10.5f\t is %10.5f\n',a,x(end));
end
function Divide_Average(a,x0,tol)
↑
Error: Function definition not supported in this context. Create functions in code file.
>>
nina lucia lins dias
编辑：Walter Roberson 2023-8-1
I am trying to do this:
function edge_r ( )
im = imread('rice.png');
[row col] = size(im)
for i=1:row-1
im2(i,j) =abs(im(i+1,j+1)) + abs(im(i+1,j));
end
end
figure, imshow(im2);
figure, imshow(im)
however i cannot writing down the whole statement cos it gave me errors
function edge_r()
function edge_r()
↑
Error: Function definition are not supported in this context. Functions can only be created as local or nested functions in
code files.
Emmanuel
Emmanuel 2023-8-1

function predator_simulation() ↑ Error: Function definition are not supported in this context. Functions can only be created as local or nested functions in code files.

Fathima
Fathima 2024-6-10
function bitDepth = fetchBitDepth(imageData)
↑
Error: Function definitions are not supported in this context. Functions can only be created as local or nested functions in code files.
  1 个评论
Stephen23
Stephen23 2024-6-10
编辑：Stephen23 2024-6-10
Functions cannot be defined at the command line. You must store that code in fetchBitDepth.m file.
Tip for the future: read the thread before posting.

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Environment and Settings 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