[R-Forge #4766] add boolean detection to fread

[arunsrinivasan]

Submitted by: Adam November; Assigned to: Nobody; R-Forge link

right now fread reads logicals as character strings. Could they be detected as logicals?

df <- data.frame(I=1:3, L=c(T,F,NA))

write.csv(df,'tmp.csv',row.names=F)

df2 = read.csv('tmp.csv')
class(dt$L)
# [1] "logical"

dt = fread('tmp.csv')
class(dt$L)
# [1] "character"

[mattdowle]

It does read logicals in v1.9.2 but not if blank or NA were in the column. Now fixed.