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How to increment a variable

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KHADIJA
KHADIJA 2013-12-24
评论： John D'Errico 2022-9-14
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.

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采纳的回答

John D'Errico
John D'Errico 2016-8-26
编辑：MathWorks Support Team 2019-5-22
To increment a variable X, simply use
X = X+1;
MATLAB does not support the increment operator ++.
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Jan
Jan 2022-9-14
No, you can't do this in Matlab.
John D'Errico
John D'Errico 2022-9-14
@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.

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更多回答（2 个）

Wayne King
Wayne King 2013-12-24
编辑：Walter Roberson 2022-1-21
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 个评论
Nivethana Narayanan
Nivethana Narayanan 2021-11-28
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
Luke Simonson 2022-1-21
You need to initialize a as a variable before you set a = a+1.
a = 0;
a = a+1;

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Walter Roberson
Walter Roberson 2013-12-24
You could create a class with preincrement and postincrement methods.
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Francois Deneuville
Francois Deneuville 2019-4-17
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
Jesús Ramos 2021-5-29
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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