Convertir Factor --> num (NAs introduced by coercion)
Bonjour,
Lorsque j'essaie de convertir la colonne Health en num
Code:
data$Health<-as.numeric(as.character(data$Health))
, j'obtiens le message d'alerte suivant:
Citation:
Warning message:
NAs introduced by coercion
Code:
1 2 3 4 5 6 7 8
| > str(data)
'data.frame': 889 obs. of 6 variables:
$ Year : Factor w/ 2 levels "2002","2003": 1 1 1 1 1 1 1 1 1 1 ...
$ Health : Factor w/ 2 levels "bankruptcy","healthy": 1 1 2 2 1 1 1 2 1 1 ...
$ EBITDA.Total.Assets : num -0.00491 0.08496 0.45284 0.2098 -0.07732 ...
$ Value.Added.Total.Sales : num 0.213 0.113 0.484 0.395 0.295 ...
$ Quick.Ratio : num 0.0904 0.946 1.3734 1.2709 0.697 ...
$ Accounts.Payable.Total.Sales: num 0.2941 0.2854 0.0598 0.2535 0.0558 ... |
Merci,