How can I summarize by group by in (R)?

I would like to summarize Votes by Party.

My table:

State     Party    Votes    

NY         RP       80
NY         DM       20
CA         RP       30
CA         DM       70

Expected:

Party   Votes

RP      110
DM       90

This doesnt work for me:

data <- data %>% group_by(Party) %>% summarise(Votos)

Thanks!

>Solution :

Use the sum() function within summarise

library(dplyr)
df %>% 
  group_by(Party) %>% 
  summarise(Votes = sum(Votes, na.rm = TRUE))

 Party Votes
  <chr> <int>
1 DM       90
2 RP      110

If you want to have sorted:

df %>% 
  group_by(Party) %>% 
  summarise(Votes = sum(Votes, na.rm = TRUE)) %>% 
  arrange(desc(Votes))

  Party Votes
  <chr> <int>
1 RP      110
2 DM       90