Info

此问题已关闭。 请重新打开它进行编辑或回答。

sparse mtrix from sparse matrices

1 次查看（过去 30 天）
fatema saba
fatema saba 2014-11-26
关闭： MATLAB Answer Bot 2021-8-20
Hi
I have three matrices (a, h and k1) like:
a =
(1,1) 1
(2,2) 1
(3,3) 1
(4,4) 1
(5,5) 1
(6,6) 1
(7,7) 1
(8,8) 1
(9,9) 1
>> h=sparse(n3,n3)
h =
All zero sparse: 9-by-9
>> k1=-4*a
k1 =
(1,1) -4
(2,2) -4
(3,3) -4
(4,4) -4
(5,5) -4
(6,6) -4
(7,7) -4
(8,8) -4
(9,9) -4
I want to create a matrix from these matrices in this form that is sparse.
q=['k1' 'h' 'a' 'h'; 'h' 'k1' 'h' 'a']
How can create that please?
  2 个评论
fatema saba
fatema saba 2014-11-26
Hi
I can find it. it is something like that:
q=sparse([k1,h,a,h;h,k1,h,a])
the cyclist
the cyclist 2014-11-26
I think the concatenation of sparse arrays is sparse, so you probably don't need that sparse command.

此问题已关闭。

回答（0 个）

此问题已关闭。

标签

Community Treasure Hunt

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

Start Hunting!

Translated by