I'm following an analysis of German Credit data and I got an error which I'm failing to rectify because I already installed the ROCR package. Below is the code that uses the ROCR:
#load library
library(ROCR)
#score test data set
test$score <- predict(m,type='response',test)
pred <- prediction(test$score,test$good_bad)
perf <- performance(pred,"tpr","fpr")
plot(perf)
Now, after running pred, I get the following error:
>pred <- prediction(test$score,test$Good_Bad)
Error: could not find function "prediction".
This also happens when I try to execute the following line:
>perf <- performance(pred,"tpr","fpr")
Error: could not find function "performance"
Answer
I had the same issue... If you look closely, it says:
Loading required package: gplots
Error in loadNamespace(j <- i[[1L]], c(lib.loc, .libPaths()), versionCheck = vI[[j]]) :
there is no package called ‘KernSmooth’
In addition: Warning messages:
1: package ‘ROCR’ was built under R version 3.0.3
2: package ‘gplots’ was built under R version 3.0.3
Error: package ‘gplots’ could not be loaded
I simply installed the install.packages("gplots") and then loaded the library and it loaded and found the function without any issues.
Hope this helps