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Math Forum » Discussions » Software » comp.soft-sys.matlab

Topic: Random Matrix help
Replies: 3   Last Post: May 6, 2013 2:40 PM

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Bruno Luong

Posts: 8,737
Registered: 7/26/08
Re: Random Matrix help
Posted: May 6, 2013 1:37 PM
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>> n=5

n =

5

>> A=tril(round(rand(n)))

A =

0 0 0 0 0
0 1 0 0 0
0 1 1 0 0
1 1 0 1 0
0 1 1 1 0

>> A=A+A'

A =

0 0 0 1 0
0 2 1 1 1
0 1 2 0 1
1 1 0 2 1
0 1 1 1 0

>> A(A==0) = -1

A =

-1 -1 -1 1 -1
-1 2 1 1 1
-1 1 2 -1 1
1 1 -1 2 1
-1 1 1 1 -1

>> A(1:n+1:end) = 0

A =

0 -1 -1 1 -1
-1 0 1 1 1
-1 1 0 -1 1
1 1 -1 0 1
-1 1 1 1 0

% Bruno



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