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

Topic: What am I missing?
Replies: 5   Last Post: Nov 23, 2012 5:30 PM

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Nasser Abbasi

Posts: 5,078
Registered: 2/7/05
Re: What am I missing?
Posted: Nov 22, 2012 5:20 PM
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On 11/22/2012 4:00 PM, Nasser M. Abbasi wrote:
> On 11/22/2012 3:18 PM, Greg Heath wrote:
>> % help rank
>> %
>> % rank Matrix rank.
>> % rank(A) provides an estimate of the number of linearly
>> % independent rows or columns of a matrix A.
>>
>
>> A = 1 0 1 1 0
>> 0 1 0 0 1
>
>> rankA = 2
>>
>> Why isn't rankA = 1?
>>
>> Greg
>>

>
> It is the maximum number of linearly independent column or rows in A.
> Which is 2. For example, the first 2 columns.
>

hi;

follow up:


EDU>> [U,S,V] = svd(A)

U =

1 0
0 1

S =
1.7321 0 0 0 0
0 1.4142 0 0 0


V =
0.5774 0 -0.5774 -0.5774 0
0 0.7071 0 0 -0.7071
0.5774 0 0.7887 -0.2113 0
0.5774 0 -0.2113 0.7887 0
0 0.7071 0 0 0.7071


--Nasser

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