Last active
June 6, 2019 02:01
-
-
Save LetticiaNicoli/59ca9b9eed42197d5ea1ccda22c4cb46 to your computer and use it in GitHub Desktop.
R - Manipulação de Dados
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
#Manipulação de dados | |
install.packages('dplyr') | |
library('dplyr') | |
head(starwars) | |
#Mutate | |
s2 <- mutate(starwars, | |
imc = mass / ((height / 100) ^ 2) ) | |
load("~/Aula/BrFlights2.RData") | |
BrFlights2 = mutate(BrFlights2, | |
Partida.Atraso = difftime(Partida.Real,Partida.Prevista, units = "mins"), | |
Chegada.Atraso = difftime(Chegada.Real,Chegada.Prevista, units = "mins"), | |
DistanciaEuclidiana = sqrt(((LatDest - LatOrig)^2) + ((LongDest - LongDest)^2)), | |
TempoViagem.Real = difftime(Chegada.Real,Partida.Real, units = "hours")) | |
#Pipe | |
starwars %>% head (.) | |
#ou head(starwars) | |
#Filters | |
starwars %>% | |
filter(species == "Droid") | |
starwars %>% | |
filter(species == "Droid") %>% | |
View() | |
BrFlights2 %>% filter(Companhia.Aerea == "AZUL") %>% View() | |
#SELECT | |
starwars %>% | |
select(name, ends_with("color")) | |
#Sequencia de colunas | |
starwars %>% | |
mutate(name, imc = mass / ((height / 100) ^ 2)) %>% | |
select(name:mass, imc) | |
#Reordenar linhas | |
starwars %>% arrange(desc(mass)) | |
#Agregações | |
starwars %>% | |
group_by(species) %>% | |
summarise( | |
j = n()) | |
starwars %>% | |
group_by(species) %>% | |
summarise( | |
j = n(), | |
mass = mean(mass, na.rm = TRUE) | |
) %>% | |
filter(j > 1) |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment