|
|
They are
bioinformatics data, from a database of single nucleotide
polymorphisms.
From
http://www.cs.wpi.edu/~ruiz/Publications
/SPSR+01:genepi/revised_submitted_02_02.pdf:
We have developed a Multivariate Data Visualization (MDV)
program, Scansort (Ward,
unpublished; available at matt@cs.wpi.edu), which sorts the
SNP loci using differences
between genotype frequencies of affected and unaffected
subjects. The program
generates one record for each SNP as follows: {diff, 11h,
12h, 22h, 11s, 12s, 22s , d11, d12,
d22, ID}, where ID is the SNP index in the original order;
ijh is the frequency of unaffected (healthy) individuals
with genotype ij; ijs is the frequency of affected (sick)
individuals with genotype ij; and dij=|ijh - ijs|. diff is
the sorted SNP index computed as
diff=4
d11+d12+d22 |
