On Feb 3, 2010, at 12:25 PM, Hongbin Zhang wrote:
I have a R object which has a value (see below, e.g., the
"0.8341875") I like to extract to put into a simple form, e.g., an
array.
how could I do that?
below is the code:
library(ROCR)
data(ROCR.simple)
pred <- prediction( ROCR.simple$predictions, ROCR.simple$labels)
auc <- performance(pred,"auc")
auc
> arr <- array(, dim=c(3,3,3) )
> arr[1,1,1] <- [email protected][[1]]
> arr
, , 1
[,1] [,2] [,3]
[1,] 0.8341875 NA NA
[2,] NA NA NA
[3,] NA NA NA
, , 2
[,1] [,2] [,3]
[1,] NA NA NA
[2,] NA NA NA
[3,] NA NA NA
, , 3
[,1] [,2] [,3]
[1,] NA NA NA
[2,] NA NA NA
[3,] NA NA NA
An object of class performance
[1] "None"
Slot "y.name":
[1] "Area under the ROC curve"
Slot "alpha.name":
[1] "none"
Slot "x.values":
list()
Slot "y.values":
[[1]]
[1] 0.8341875
Slot "alpha.values":
list()
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
David Winsemius, MD
Heritage Laboratories
West Hartford, CT
______________________________________________
[email protected] mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
