Filter löschen
Filter löschen

What is sigma function?

26 Ansichten (letzte 30 Tage)
Tu Nguyen
Tu Nguyen am 2 Mär. 2022
Kommentiert: Walter Roberson am 2 Mär. 2022
Hi all, this is an assignment of from class digtal signal processing. The question 1 is the image "Question1", what is the sigma function? anyone knows please explain to me. How can I plot like the answer?

Antworten (1)

Steven Lord
Steven Lord am 2 Mär. 2022
From Wikipedia: "In general mathematics, uppercase Σ is used as an operator for summation." In MATLAB see the sum function.
I'm guessing you're fairly new to MATLAB, am I right? If so you might want to go through the free MATLAB Onramp tutorial ( to quickly learn the essentials of MATLAB. It should take about 2 hours according to the webpage (I haven't actually gone through it myself.)
  1 Kommentar
Walter Roberson
Walter Roberson am 2 Mär. 2022
Also note that δ is not sigma, which would be written as σ . Instead δ represents the Dirac Delta. In that context, δ is a function that is 0 whenever its input is non-zero, and is 1 when the input is exactly 0.
δ(x) = (x==0)
so for example δ(x-3) would be 0 for all x except when x==3 exactly in which case it is 1.

Melden Sie sich an, um zu kommentieren.


Mehr zu Creating and Concatenating Matrices finden Sie in Help Center und File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by