Displaying 2 results from an estimated 2 matches for "roussi".
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rossi
2007 Jul 13
1
RODBC Access
Dear R users,
I am trying to connect an Access database.
The code I use is :
channel<-odbcConnectAccess("Base")
table.db<-sqlFetch(Base,"table",colnames=T)
When I look at the table in R, the table imported lacks the first 41 lines, and the column names are the values of the 42nd record.
Any hints ?
I am working on a WinXP pro 5.1 box, R 2.5-0 compiled from source
2011 Aug 19
1
help Dxy and C-index calculation
Dear professor,
I am currently using Design package and the cph formula for assessing
multivariable analysis.
I am tryng to get the C-index for my survival model based on Dxy
coefficient.
I am confused since there is a negative value.
Do I need to used the absolute Dxy ?
index.orig training test optimism index.corrected n
Dxy -0.341357727 -0.344002740