MATLAB Mathematics - SERC - Index of

Introduction
d = [-3
0
2];
Use these matrices to create a 7-by-4 sparse matrix A.
A = spdiags(B,d,7,4)
A =
(1,1) 11
(4,1) 41
(2,2) 22
(5,2) 52
(1,3) 13
(3,3) 33
(6,3) 63
(2,4) 24
(4,4) 44
(7,4) 74
In its full form, A looks like this.
full(A)
ans =
11 0 13 0
0 22 0 24
0 0 33 0
41 0 0 44
0 52 0 0
0 0 63 0
0 0 0 74
spdiags can also extract diagonal elements from a sparse matrix, or replace
matrix diagonal elements with new values. Type help spdiags for details.
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