r - How to convet an S4 class objects slots into vectors or matrix? -


i have s4 class object rocr package. has several slots containing data related among each other (i.e. "x.values", "y.values", , "alpha.values").

i merge them in matrix accessing slots make calculations (youden indices, etc.)

i've tried things (according limited knowledge of r)

test<-cbind(perf@x.values,perf@y.values,perf@alpha.values)

and other formulas such changing class of object directly...

but worked.

any welcomed

thanks

if know slot names (use getclass if don't), can pull them out @ operator. don't know rocr assuming have slot names right, can do

x <- perf@x.values y <- perf@y.values <- perf@alpha.values

and examine them other r object. cbind isn't working because dimensions of objects don't match.


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