Create a new structure that looks like:
x1 x2 .. etc
obj1 .. ..
obj2 .. ..
obj3 .. ..
... ..
etc ..
and work from there.
Good luck, Frank.
________________________________
From: SPSSX(r) Discussion on behalf of Homayoun
Sent: Fri 26/01/2007 15:36
To:
[hidden email]
Subject: Re: MDS map: proximities and Euclidean distances
Hi Frank,
Thank you for the syntax. Actually my data structure for case of two objects is like:
Object 1 Object2
x1 y1 x2 y2
To find the distance between these two objects, I can write distance formula in syntax. However, suppose I have 5 objects, and want to find the distance between pair of objects (10 pairs). I wonder if there is an easy way in SPSS to find distance matrix of pairs.
Thanks,
Homayoun
----- Original Message ----
From: "Busing, Frank" <
[hidden email]>
To:
[hidden email]
Sent: Thursday, January 25, 2007 8:11:28 AM
Subject: MDS map: proximities and Euclidean distances
Dear Homayoun.
I thinks it must be something like this:
DATA
X Y
1,00 5,00
2,00 6,00
3,00 7,00
4,00 8,00
PROXIMITIES X Y
/VIEW = CASE
/MEASURE = EUCLID
/STANDARDIZE = NONE.
RESULTS
Proximity Matrix
Euclidean Distance
1 2 3 4
1 ,000 1,414 2,828 4,243
2 1,414 ,000 1,414 2,828
3 2,828 1,414 ,000 1,414
4 4,243 2,828 1,414 ,000
This is a dissimilarity matrix
The subcommand computes the Euclidean distance between cases,
containing two variables X and Y,
and returns a distance matrix.
Good luck, Frank.
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