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Debugging a piece of code

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Federico Gremmo
Federico Gremmo on 3 Nov 2020
Edited: per isakson on 28 Nov 2020
I have been trying to run a piece of code written in Matlab that contains the following:
function list = shellsort(list);
interval = floor(length(list)/3);
I get the following error message:
Not enough input arguments.
Error in shellsort (line 3) interval = floor(length(list)/3);
Any ideas on how to debug it?

Answers (2)

Walter Roberson
Walter Roberson on 3 Nov 2020
When you press the green Run button, what is your expectation about where MATLAB will search for the value of the variable named list ?
  2 Comments
Walter Roberson
Walter Roberson on 5 Nov 2020
You are pressing the green Run button to initiate the code. MATLAB needs to know the value of the variable named list in order to proceed. Where are you expecting MATLAB to look to find the variable named list?

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Monika Jaskolka
Monika Jaskolka on 3 Nov 2020
How are you running the shellsort function? From the error message you provided, it looks like you are not giving shellsort any input parameters
% Incorrect
>> shellsort
Not enough input arguments.
Error in shellsort (line 2)
interval = floor(length(list)/3);
% Correct
>> shellsort(list)
ans =
1 2 3
  15 Comments

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