How can I see the full matrix when I use spdiags() ?

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LUCA GIROTTI
LUCA GIROTTI 2022-3-26
评论： LUCA GIROTTI 2022-3-26
Hey there,
I am currently using the function spdiags and the outcome is the following:
An:
(1,1) 4
(2,1) -1
(1,2) -1
(2,2) 4
(3,2) -1
(2,3) -1
(3,3) 4
(4,3) -1
(3,4) -1
(4,4) 4
with this particular input : An = spdiags([- ones(n ,1) , 4* ones(n ,1) , - ones(n ,1)] , [ -1 , 0 , 1] , n , n)
Is there perhaps a way to see the full matrix instead of just this?
Thanks in advance!

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Walter Roberson
Walter Roberson 2022-3-26
full(spdiags(TheSparseMatrix))
??

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