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

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?

[Stephen23]

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

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

Answer 1

[Michael Haderlein]

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