Thread Subject:

Distance between two matrices

Hey guys,

How do I compute the distance between say two 2x 2 matrices A and B using matlab?
thanks

On 5/11/2012 11:56 AM, anyani himura wrote:
> Hey guys,
>
> How do I compute the distance between say two 2x 2 matrices A and B using matlab?
> thanks

If you tell me what is your definition of 'distance' betweem 2 matrices
I'll tell how to do it in Matlab.

--Nasser

"anyani himura" <colormason@att.net> wrote in message <jojgbd$5kt$1@newscl01ah.mathworks.com>...
> Hey guys,
>
> How do I compute the distance between say two 2x 2 matrices A and B using matlab?
> thanks

norm(A-B)
norm(A-B,'fro')
etc...

Bruno

"Bruno Luong" <b.luong@fogale.findmycountry> wrote in message <jojhb4$9vj$1@newscl01ah.mathworks.com>...
> "anyani himura" <colormason@att.net> wrote in message <jojgbd$5kt$1@newscl01ah.mathworks.com>...
> > Hey guys,
> >
> > How do I compute the distance between say two 2x 2 matrices A and B using matlab?
> > thanks
>
> norm(A-B)
> norm(A-B,'fro')
> etc...
>
> Bruno

There are many ways to compute the distance! if by distance you mean the distance determine the differences between elements the two (comparing them like in image processing information theory) , you can use pdist or pdist2.

Otherwise you can just do as Bruno has mentioned.

On May 11, 1:13 pm, "Bruno Luong" <b.lu...@fogale.findmycountry>
wrote:
> "anyani himura" <colorma...@att.net> wrote in message <jojgbd$5k...@newscl01ah.mathworks.com>...
> > Hey guys,
>
> > How do I compute the distance between say two 2x 2 matrices A and B using matlab?
> > thanks
>
> norm(A-B)
> norm(A-B,'fro')
> etc...
>
> Bruno

-----------------------------------------------
Adding to the list:
Hausdorff distance between two polygons arrays:
http://cgm.cs.mcgill.ca/~godfried/teaching/cg-projects/98/normand/main.html

Mahalanobis distance
http://en.wikipedia.org/wiki/Mahalanobis_distance

etc....