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Can somebody tell me what this notation means?

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Hi, everyone! I am reading through a textbook which integrates the use of MATLAB and I don't quite understand what this notation means.
K(lm, lm) = K(lm, lm) + k
Any help would be appreciated! Thank you!

Accepted Answer

Mouhamed Niasse
Mouhamed Niasse on 24 Jun 2021
Hello,
You're adding 'k' to the value initially stored at the location row 'lm' column 'lm' in the matrix K.
For example,
>> K=ones(3,3)
K =
1 1 1
1 1 1
1 1 1
>> k=5
k =
5
>> K(2,2)=K(2,2)+k
K =
1 1 1
1 6 1
1 1 1

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