It worked after I saved the file with the same filename as my function, i.e my filename was not calcarea.m before, once I renamed the filename as calcarea.m, it started functioning. I had to call the function in the command window though.
Error: Function definitions are not permitted in this context.
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Nabin SUNAM
am 22 Jan. 2015
Bearbeitet: Walter Roberson
am 17 Mai 2021
This is my function
function [ area ] = calcarea(rad )
area = pi*rad.^2
end
When I try to run it, following message shows up, "The selected section cannot be evaluated because it contains an invalid statement
Also, the command window says "Error: Function definitions are not permitted in this context"
What am I doing wrong???
Akzeptierte Antwort
Image Analyst
am 23 Jan. 2015
You probably have that function below a script in your m-file. You can't mix a script and a function in the same file. You can have two functions though. So if your file is called test.m, you could have all this in the single file:
function test()
area = calcarea(10)
end
function area = calcarea(rad)
area = pi*rad.^2;
end
Or you could have them in two separate files:
A script in test.m:
area = calcarea(10)
A function in calcarea.m:
function area = calcarea(rad)
area = pi*rad.^2;
end
5 Kommentare
Image Analyst
am 6 Mär. 2018
Attach your m-file(s) in a new question (not here in Nabin's question).
Walter Roberson
am 6 Mär. 2018
Sanjiv Kumar what happened when you followed the instructions I gave in your Question to install the contents of the .zip I provided for you?
Weitere Antworten (5)
Star Strider
am 22 Jan. 2015
You have to put functions such as yours in their own separate .m-files. In your situation, you would save it as: calcarea.m, and to run it from your main script, you would call it as:
area = calcarea(rad)
2 Kommentare
bahadir safak
am 17 Dez. 2016
Bearbeitet: Walter Roberson
am 6 Mär. 2018
sigma=1;
thresh=1000;
disp=1;
radius=1
im=imread('11.jpg');
function [cim, r, c] = harris(im, sigma, thresh, radius, disp)
error(nargchk(2,5,nargin));
dx = [-1 0 1; -1 0 1; -1 0 1]; % Derivative masks
dy = dx';
Ix = conv2(im, dx, 'same'); % Image derivatives
Iy = conv2(im, dy, 'same');
??? Error: File: harris1.m Line: 45 Column: 1
Function definitions are not permitted in this context.
>>
???
7 Kommentare
Stephen23
am 4 Mai 2017
Bearbeitet: Stephen23
am 4 Mai 2017
@Mohammedashraf Shaikh: your code is badly aligned, and this makes hiding the errors easy. Once I correctly aligned your code and put each operation on its own line, then the (first) mistake is obvious, and occurs in the first five lines of code:
function[d] = hcompare_EMD(h1,h2)
d = sum(abs(cumsum(h1) - cumsum(h2)));
end
img = imread('C:\Users\Hp\Desktop\col\001.jpg');
function[h] = histImage(img)
...
You call img = ... outside of any function.
It is also possible that your first function definition occurs after some lines of code in a script. Depending on MATLAB version, this will also cause an error. See the other answers for more info on this.
Summary: Learn to align your code consistently (use the MATLAB defaults), and do not put multiple operators onto one line (especially the end for functions!). You can automatically align the code in the MATLAB Editor: select all code, then press ctrl+i.
Rwigema james
am 7 Jul. 2017
Bearbeitet: Image Analyst
am 7 Jul. 2017
function Iout = readAndPreprocessImage(filename)
I=imread(filename);
if ismatrix(I)
I = cat(3,I,I,I);
end
Iout = imresize(I,[227 227]);
end
Why am I getting this error?????
Function definitions are not permitted in this context.
2 Kommentare
Image Analyst
am 7 Jul. 2017
You're putting the function definition in a place where it does not belong, such as below a script in release R2016a and earlier, or elsewhere.
Abbas Khreis
am 16 Mai 2021
i have 2016a version and the error Function definitions are not permitted in this con
plz help me
Elena MEZZAPESA
am 16 Nov. 2017
Hello, Did you solve the issues to this problem in the end? As of 2017 I still get this error ?! I am trying to understand if it is because I am using a trial version of the software. Best regards,
Elena
1 Kommentar
Image Analyst
am 16 Nov. 2017
It was masked as being solved. The trial version is no different than a full version other than being time-limited to 30 days. We'd have to see your code to figure out what's going wrong with your program.
Frieder Wittmann
am 27 Mai 2018
This is one of the main disadvantages of MATLAB notebooks over Jupyter (python) notebooks. If I can't define functions in the middle of a script, the notebook becomes hard to read.
6 Kommentare
Frieder Wittmann
am 17 Mai 2021
Bearbeitet: Frieder Wittmann
am 17 Mai 2021
It isn't, it's one of the most common competitors.
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