Getting "length" (number of columns) of a ffdf dataframe
## S3 method for class 'ffdf' length(x)
x
an ffdf object
ffdf
integer number of columns
Jens Oehlschlägel
dim.ffdf, length.ff, ffdf
dim.ffdf
length.ff
length(as.ffdf(data.frame(a=1:26, b=letters))) gc()