gather converts non-gathered factors to integers #104
Description
When gathering a number of columns in a data frame, the format of ungathered columns should remain unaffected, but it appears that ungathered factor columns are converted to integers with tidyr 0.3.0 (I use vanilla R 3.2.2 under Ubuntu 14.04).
Create example data
> df <- data.frame(Name = gl(2, 2, 8, c("Alice", "Bob")),
A = sample(8), B = sample(8), C = sample(8))
> str(df)
'data.frame': 8 obs. of 4 variables:
$ Name: Factor w/ 2 levels "Alice","Bob": 1 1 2 2 1 1 2 2
$ A : int 3 5 4 7 2 6 1 8
$ B : int 7 5 6 2 4 3 1 8
$ C : int 8 6 3 4 7 5 1 2
Gather and inspect
> df %>% gather(Col, Value, A:C) %>% str
'data.frame': 24 obs. of 3 variables:
$ Name : int 1 1 2 2 1 1 2 2 1 1 ...
$ Col : Factor w/ 3 levels "A","B","C": 1 1 1 1 1 1 1 1 2 2 ...
$ Value: int 3 5 4 7 2 6 1 8 7 5 ...