How convolution with 'same' parameter select the first item?

1 Ansicht (letzte 30 Tage)
yu chen
yu chen am 22 Jul. 2018
Beantwortet: Image Analyst am 22 Jul. 2018
In the example of 'same' shape,
u = [-1 2 3 -2 0 1 2];
v = [2 4 -1 1];
w = conv(u,v,'same')
w =
15 5 -9 7 6 7 -1
The full convolution is [-2 0 15 5 -9 7 6 7 -1 2]. Why start from the 3rd item 15? Not 2nd item 0?

Antworten (1)

Image Analyst
Image Analyst am 22 Jul. 2018
The full convolution has more numbers because the window can "go off" the edge of the data. Do you understand that part? If so, the answer should be obvious. Where do you think the 15 should go? Remember there are no negative indexes or zero indexes.

Kategorien

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