What does this syntax/notation mean? En=[En sum(x(n-L+1:n).^2.*win(1:L)')];

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lanel 2015-3-11

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评论： Stephen23 2015-3-11

I understand the equation; I am not familiar with the notation of "En = [En ... ]" and can't find it with any search of help. What is the purpose of renaming the En inside the brackets?

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Stephen23 2015-3-11

The documentation explains the purpose of the square brackets []:

http://www.mathworks.com/help/matlab/ref/specialcharacters.html

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Answer 1

Michael Haderlein 2015-3-11

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编辑：Michael Haderlein 2015-3-11

在 MATLAB Online 中打开

En=[En sum(...)]; is just extending En by one or more elements. Try:

>> x=rand
x =
    0.2061
>> x=[x rand]
x =
    0.2061    0.1467
>> x=[x rand]
x =
    0.2061    0.1467    0.4125
>> x=[x rand(1,3)]
x =
    0.2061    0.1467    0.4125    0.8414    0.8195    0.9931