Creating a specific lower rectangular matrix
1 vue (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Hello Matlab experts!
I'm interested in creating a specific lower rectangular matrix while avoiding loops.
Step 1: I create the following column vector:
[ A1 A2 A3 . . . . An ]'
Where n is a predetermined integer (changes from one simulation to another).
Step 2: I create the following matrix:
A1 A1 A1 A1 . . . . A1
A2 A2 A2 A2 . . . . A2
A3 A3 A3 A3 . . . . A3
. . .
An An An An . . . . An
Step 3: I want to perform the following shifts: Shift the second column one step down, Shift the third column two steps down, etc. So eventually I'll get the following matrix:
A1 An An-1 An-2 . . . . A2
A2 A1 An An-1 . . . . A3
A3 A2 A1 An . . . . A4
A4 A3 A2 A1 . . . . A5
. . .
An An-1 An-2 An-3 . . . . A1
Step 4: I use the 'tril' function to get the matrix I'm interested in, which is:
A1 0 0 0 . . . . 0
A2 A1 0 0 . . . . 0
A3 A2 A1 0 . . . . 0
A4 A3 A2 A1 . . . . 0
. . .
An An-1 An-2 An-3 . . . . A1
I need assistance with performing step 3.
Maybe there are better ways to create this matrix, let me know.
Thanks, Amital
0 commentaires
Réponse acceptée
Plus de réponses (0)
Voir également
Catégories
En savoir plus sur Operating on Diagonal Matrices dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!