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From: Sitank on 23 Jul 2010 01:30
Hey guys hi to all...I need urgent help here...I have two inputs x and y
please tell me
1) How to generate a feature vector at first? what is the command in matlab?
2) How to show the direction of the principal component? Plot a line between origin and the principal eigen vector.
3) How to draw projections of the points on that principal component line?
Please guys please help
need the answer to these questions of mine at the earliest it's very urgent please...
From: Peter Perkins on 23 Jul 2010 07:44
On 7/23/2010 1:30 AM, Sitank wrote:
> 1) How to generate a feature vector at first? what is the command in
> matlab?
> 2) How to show the direction of the principal component? Plot a line
> between origin and the principal eigen vector.
> 3) How to draw projections of the points on that principal component line?

If you have access to the Statistics Toolbox, the BIPLOT function will
make the plot you are looking for in (2) and (3). I have no idea what
you mean by (1).
From: Sitank on 23 Jul 2010 09:25
Peter Perkins <Peter.Perkins(a)MathRemoveThisWorks.com> wrote in message <i2bvbn$301$1(a)fred.mathworks.com>...
> On 7/23/2010 1:30 AM, Sitank wrote:
> > 1) How to generate a feature vector at first? what is the command in
> > matlab?
> > 2) How to show the direction of the principal component? Plot a line
> > between origin and the principal eigen vector.
> > 3) How to draw projections of the points on that principal component line?
>
> If you have access to the Statistics Toolbox, the BIPLOT function will
> make the plot you are looking for in (2) and (3). I have no idea what
> you mean by (1).

Well thanks am done with 2...would try out 3
thanks for you assistance Peter
now anyone about (1)...in (1) I mean I have two inputs like
x=[ 1 2 3 4 ] and the other input that I have is
y=[6 7 8 9 ]
so what would be the feature vector? anyone...
Someone told me its f[x;y] but my prof. told me its f[x y]'
what to do now...
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