Counting the number of storms and listing their names?-CodePudding

The question is: Count the number of storms per year since 1975 and write their names What I have so far is the code below:

storms %>% 
  count(name, year >= 1975, sort = TRUE)

I got this output:

name      `year >= 1975`     n
   <chr>     <lgl>          <int>
 1 Emily     TRUE             217
 2 Bonnie    TRUE             209
 3 Alberto   TRUE             184
 4 Claudette TRUE             180
 5 Felix     TRUE             178
 6 Danielle  TRUE             165
 7 Josephine TRUE             165
 8 Edouard   TRUE             159
 9 Gordon    TRUE             158
10 Gabrielle TRUE             157

I think this is the correct output, but I just want to make sure.

CodePudding user response：

Technically, year >= 1975 part should be in filter and not in count. However, the data starts from 1975 so your output is correct as well. You get the same output even if you remove filter part from the below code.

library(dplyr)
storms %>%  filter(year >= 1975) %>% count(name, sort = TRUE)

# A tibble: 214 × 2
#   name          n
#   <chr>     <int>
# 1 Emily       217
# 2 Bonnie      209
# 3 Alberto     184
# 4 Claudette   180
# 5 Felix       178
# 6 Danielle    165
# 7 Josephine   165
# 8 Edouard     159
# 9 Gordon      158
#10 Gabrielle   157
# … with 204 more rows