On Feb 17, 2012, at 2:19 PM, A J wrote:
I don't know why data are not well shown... I have attached a PDF
file to this message with the structure of the begining list and the
final matrix one.
You should have attached the sample.txt file.
I think I have no explain the issue in a right way. Sorry for the
inconveniences. The last thing I want is to disturb with technical
questions...
Best,
AJ
nbrs <- read.table(text="ID1 IDP2 SUMVAL
1 2 0.065
1 3 0.044
3 1 0.071
3 4 0.016
3 5 0.011
4 3 0.004
4 7 0.004
4 9 0.004
5 4 0.010
5 6 0.011
5 8 0.009
5 9 0.004", header=TRUE)
mnbrs <- matrix(NA, ncol=max(c(nbrs$ID1, nbrs$IDP2)),
nrow=max(c(nbrs$ID1, nbrs$IDP2)))
mnbrs[as.matrix(nbrs[,1:2]) ]<- nbrs$SUMVAL
mnbrs
#--------------------
[,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9]
[1,] NA 0.065 0.044 NA NA NA NA NA NA
[2,] NA NA NA NA NA NA NA NA NA
[3,] 0.071 NA NA 0.016 0.011 NA NA NA NA
[4,] NA NA 0.004 NA NA NA 0.004 NA 0.004
[5,] NA NA NA 0.010 NA 0.011 NA 0.009 0.004
[6,] NA NA NA NA NA NA NA NA NA
[7,] NA NA NA NA NA NA NA NA NA
[8,] NA NA NA NA NA NA NA NA NA
[9,] NA NA NA NA NA NA NA NA NA
\\\\\\\\\\\\\\\
'
Then type:
?write.matrix
David Winsemius, MD
West Hartford, CT
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