prediction error in ROCR package when sampled y consists of only one class
Try performing stratified sampling when doing cv. cran.r-project.org/web/packages/ipred
On Fri, Apr 15, 2011 at 11:00 AM, Soyeon Kim <yunni0731 at gmail.com> wrote:
Dear R users, Hi. I am using prediction function in ROCR package. y consists of two classes 0 and 1. However, since I am using cross-validation, a sampled small number of y may consist of only one class
y
?[1] 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 In this case, prediction function gives an error: Error in prediction(predic, y) : Number of classes is not equal to 2. ROCR currently supports only evaluation of binary classification tasks. How can I solve this problem? Thank you, Soyeon Kim
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