How to increment a variable
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KHADIJA
am 24 Dez. 2013
Kommentiert: John D'Errico
am 14 Sep. 2022
Hello. I couldn't find a way to increment a variable in MATLAB using the ++ operator. Can you help me, please? Is there a function or an operator that I can use?
Thanks in advance.
Akzeptierte Antwort
John D'Errico
am 26 Aug. 2016
Bearbeitet: MathWorks Support Team
am 22 Mai 2019
To increment a variable X, simply use
X = X+1;
MATLAB does not support the increment operator ++.
12 Kommentare
John D'Errico
am 14 Sep. 2022
@Jhonler you can try, but since it is not legal MATLAB syntax, it won't work. If all languages used exactly the same syntax and code, then we would only use one language.
Weitere Antworten (2)
Wayne King
am 24 Dez. 2013
Bearbeitet: Walter Roberson
am 21 Jan. 2022
How about just
a = a+1;
a = 1;
x = zeros(10,1);
for k = 1:10;
x(a)= k^2;
a = a+1;
end
Of course, you would never write a loop for the above, or write the loop like that even if you did, but hopefully you get the point.
2 Kommentare
Nivethana Narayanan
am 28 Nov. 2021
a = a+1 doesnt work as MATLAB complains that a is Unrecognized function or variable 'a'. is there a way to address this?
Luke Simonson
am 21 Jan. 2022
You need to initialize a as a variable before you set a = a+1.
a = 0;
a = a+1;
Walter Roberson
am 24 Dez. 2013
You could create a class with preincrement and postincrement methods.
8 Kommentare
Francois Deneuville
am 17 Apr. 2019
By the way, Walter, thanks for you comment:
You could create a class with preincrement and postincrement methods.
it was a great idea
Jesús Ramos
am 29 Mai 2021
What you implemented is the ++i operator of C (or java), where the variable is increased before returning the value, if you want to implement the i++ operator, you would have to add another method to the class:
function out = post_add(self)
temp=self.i;
self.i=self.i+1;
out=temp;
end
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