Advanced Matrices addition help

7 visualizzazioni (ultimi 30 giorni)
Joseph Pauwels
Joseph Pauwels il 10 Apr 2014
Commentato: Joseph Pauwels il 15 Apr 2014
Im trying to figure out how I can create a function that will take a row vector, say 3-x-n, and figure out how to add each element of its immediate neighbor,find the average and replace create a new matrix.
so if A=[ 1 2 0 1]
[]=avg#(A)
ans= 1.5 1 1 .5
can you help

Risposte (2)

John D'Errico
John D'Errico il 10 Apr 2014
(I'm not sure how a 3xn matrix is a row vector, by the way.)
Anyway, what have you tried? Surely this is trivial with a loop. If you really want to be efficient, then why not try conv? That is usually the trick to all of these problems. Take a shot at it.
  3 Commenti
Jan
Jan il 10 Apr 2014
I do not understand, what "(r1+(r1,c1)+(r2,c1)+(r2,c2))" means.
Image Analyst
Image Analyst il 11 Apr 2014
Joseph's "Answers" moved here since they're not answers to his original question, butt comments to John's answer:
yes, sorry, should have reread my question a 3xn is not a row vector, I meant to say I want the function file to work for a row vector as well as a 3xn. Ill try conv.
Thank you,
I dont think thats what I am looking for, I now I need a loop but Im not sure how to start. If i have a 2 x 2 like
a=[2 4 2 3]
the function needs to take (r1+(r1,c1)+(r2,c1)+(r2,c2)) the average them.

Accedi per commentare.


Image Analyst
Image Analyst il 11 Apr 2014
I gave your answer in the duplicate question:
sum_Of_a = conv2(a, ones(3), 'same')
count_in_window = conv2(ones(size(a)), ones(3), 'same')
theMean = sum_Of_a ./ count_in_window % Same as "output"
  1 Commento
Joseph Pauwels
Joseph Pauwels il 15 Apr 2014
can you please delete this question and anwser thread.

Accedi per commentare.

Community Treasure Hunt

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

Start Hunting!

Translated by