I would like to learn how to order a dataframe (List_Habitat) depending on your own criteria.
List_habitat:
Specie Habitat
Amaranthus Crop
Apiaceae Edge
Asteraceae Quercus
Malvaceae Wasteland
I want to sort the species based on the habitats that the Quercus habitat appears before the Wasteland, this before the Edge and finally the Crop habitat.
Adrián:
The key is to convert the "Habitat" column into a factor ordered according to the criteria you prefer. It would be something like that, following your ordination criteria:
# Dataframe
List_habitat<-data.frame(Specie=c("Amaranthus", "Apiaceae", "Asteraceae", "Malvaceae"), Habitat=c("Crop", "Edge", "Quercus", "Wasteland"))
# Conversión a factor ordenado según criterio
List_habitat$Habitat<-factor(List_habitat$Habitat, c("Quercus","Wasteland","Edge","Crop"),ordered = TRUE)
# Ordenar dataframe
List_habitat<-List_habitat[order(List_habitat$Habitat),]
List_habitat
Specie Habitat
3 Asteraceae Quercus
4 Malvaceae Wasteland
2 Apiaceae Edge
1 Amaranthus Crop
Greetings