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ffdfオブジェクトの列を簡単に削除できますか?
ffdf
library(ff);library(ffbase) irisdf=as.ffdf(iris)
Sepal.lengthとSpecies列のみを含める方法は?
Sepal.length
Species
あなたはsubsetから試すことができますffbase
subset
ffbase
library(ffbase) Subiris <- subset(irisdf, select=c('Sepal.Length', 'Species')) dim(Subiris) #[1] 150 2 colnames(Subiris) #[1] "Sepal.Length" "Species"