# How can I fix my function?

조회 수: 19 (최근 30일)
Matlab Student 2021년 9월 19일
댓글: Walter Roberson 2021년 9월 22일
Hi, I'm new to Matlab and have a lot of difficulty understanding how to properly write functions. I need to write a function ispythag that will recieve three positive integers (a,b,c) that will return a logical 1 if they form a pythagorean triple, or logical 0 if they don't. I also cannot use if or select statements.This is the code I have written but I always get an error saying unrecognized function or variable 'a', however when I write a script using this code and write "ispythag(1,2,3)" or "ispythag(3,4,5)" in the command prompt, I get the logical answers I need. After several attempts at changing my code without success, I was hoping someone might be able to lend me some guidance. Thank you very much for your time and help!
Ptriple = ispythag(a,b,c)
Ptriple = a^2+b^2 == c^2;
ispythag(1,2,3)
ispythag(3,4,5)
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Cris LaPierre 2021년 9월 20일
You have not property declared your function. See this page for help with that. It also contains some working examples that you can modify to get your function started.

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### 채택된 답변

Wan Ji 2021년 9월 20일
Hey， friend
Just try the inline function
ispythag = @(a,b,c)a.^2+b.^2 == c.^2;
a = ispythag(1,2,3)
b = ispythag(3,4,5)
Then you will obtain the result
a =
logical
0
b =
logical
1
##### 댓글 수: 2없음 표시없음 숨기기
Matlab Student 2021년 9월 22일
Thank you ver much for your help. Just a quick follow up question, why do i need to include the '@' in the function?
Walter Roberson 2021년 9월 22일
The correct term for this in MATLAB is "anonymous function". It is documented at https://www.mathworks.com/help/matlab/matlab_prog/anonymous-functions.html
MATLAB does have "inline" functions as well, which are not recommended; they are an older technology that has a number of drawbacks compared to anonymous functions.

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