Nothing
# https://github.com/WinVector/pyvtreat/blob/master/Examples/StratifiedCrossPlan/StratifiedCrossPlan.ipynb
test_project_empty <- function() {
prepared_stratified <- data.frame(
'y' = c(1, 0, 0, 1, 0, 0),
'g' = c(0, 0, 0, 1, 1, 1),
'x' = c(1, 2, 3, 4, 5, 6)
)
ops <- local_td(prepared_stratified) %.>%
project(.,
sum %:=% sum(y),
mean %:=% mean(y),
size %:=% n(),
groupby='g')
opsb <- local_td(prepared_stratified) %.>%
project(.,
groupby='g',
sum %:=% sum(y),
mean %:=% mean(y),
size %:=% n())
expect_equal(format(ops), format(opsb))
# used to throw
ops2 <- local_td(prepared_stratified) %.>%
project(.,
sum %:=% sum(y),
mean %:=% mean(y),
size %:=% n())
ops3 <- local_td(prepared_stratified) %.>%
project(.,
groupby=c(),
sum %:=% sum(y),
mean %:=% mean(y),
size %:=% n())
expect_equal(format(ops2), format(ops3))
invisible(NULL)
}
test_project_empty()
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