solving an equation using linsolve...............

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Tankeswar Kumar
Tankeswar Kumar 2013-2-22
In the following:
s =
2 3
3 4
t =
1
2
[p q]=linsolve(s,t)
p =
2.0000
-1.0000
q =
0.0204
How to find out q manually........

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回答（1 个）

Azzi Abdelmalek
Azzi Abdelmalek 2013-2-22
编辑：Azzi Abdelmalek 2013-2-22
I am not sure what you mean by manually:
q=rcond(s)
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Azzi Abdelmalek
Azzi Abdelmalek 2013-2-22
In your case
norm(s,1)=max(2+3,3+4)=7
inv(s)=
-4 3
3 -2
norm(inv(s),1)=max(abs(-4)+3,3+abs(-2))=7
Then
rcond(s)=1/(7*7)=0.204

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