CODEWITHSUNDEEP
raucprecision-recall
Newbie
Newbie

Reputation: 421

AUC of a Precision Recall Curve by using package ROCR

How to obtain AUC (area under curve) of a Precision Recall Curve by using package ROCR..? 

library(ROCR)
data(ROCR.simple)
pred <- prediction( ROCR.simple$predictions, ROCR.simple$labels)
perf <- performance(pred,"tpr","fpr")
plot(perf)
## precision/recall curve (x-axis: recall, y-axis: precision)
perf1 <- performance(pred, "prec", "rec")
plot(perf1)

Upvotes: 5

Views: 5737

Answers (3)

user72036
user72036

Reputation: 11

It looks like there are 2 measures for ROCR. auc and aucpr. This worked for me

For ROC

perfauc <- performance(pred, "auc")

For PR

perf1auc <- performance(pred, "aucpr")

Upvotes: 1

USER_1
USER_1

Reputation: 2469

ROCR can calculate AUC directly:

perf <- performance(pred, "auc")

Get AUC

[email protected][[1]]

Upvotes: -1

user2715182
user2715182

Reputation: 723

You can first get the precision and recall values

x <- [email protected][[1]] # Recall values
y <- [email protected][[1]] # Precision values

and then calculate Area under the curve using any of the methods from calculate area under the curve

Upvotes: 2

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