matlab equivalent of "+="

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Samuel
Samuel on 11 Oct 2011
Commented: Real User on 31 Jan 2024
Hello all,
First of all, I would like to say thanks for all your help. Your prompt and accurate replies save me a lot of programming time.
When I used to program in java, there was a useful command, so to say:
"counter+="
which will increment the variable itself. This was a useful function to use in for loops. I was wondering if matlab had a shortcut expression such as this, something that I can use in an array even, so like
somearray[i]+=; can work? Or is the only available option to say counter=counter+1? I just want to see if there was a faster way to write the expression.
thanks!
Sam

Accepted Answer

Sean de Wolski
Sean de Wolski on 11 Oct 2011
for-loops automatically increment and any reassignment inside the loop will be reset at the next increment:
for ii = 1:10
disp(ii)
ii = 5000;
end
To be able to toy with the counter use a while loop and to the assignment manually
count = count+1;
  6 Comments
Adam
Adam on 10 Apr 2018
It's annoying to type, but why is it 'not efficient'?
Ilya Gurin
Ilya Gurin on 10 Jul 2020
It's annoying both to type and to read.

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More Answers (1)

Walter Roberson
Walter Roberson on 11 Oct 2011
MATLAB does not have ++ or += or -- or -= or *= or /= or %= and is not expected to get any of those for some time (if at all.)
I think if you look back at your Java you will find it was ++ rather than += that you were using for incrementing.
  4 Comments
Andrew
Andrew on 18 Jan 2024
@Alexandre Sagona Strong agree; I wish my MATLAB class at uni would just let me use C instead.
Real User
Real User on 31 Jan 2024
data(complex_index_sequence, another_one) = data(complex_index_sequence, another_one) + data2
would benefit from "+=". It would be much easier to read and maintain.
It helps a bit to define the indices separately before that line, but "+=" would be better.

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