sd: Standard deviation

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Standard deviation

Description

Returns the standard deviation of the elements of x.

Details

First argument x: a numeric vector.

Second argument na.rm = FALSE: by default, NA's are left in the data. Setting na.rm = TRUE will remove NA's in the vector before calculating the standard deviation.

sd(x, na.rm = FALSE)

See Also

mean(), min(), max(), quantile(), var()

Examples

c(4, 6, 2, 5) %>% sd()

#> [1] 1.707825

-----------------------------------

library(gapminder)

gapminder %>%
  filter(year == 2007) %>%
  group_by(continent) %>%
  summarize(lifeExp_sd = sd(lifeExp))

#> # A tibble: 5 x 2
#>   continent lifeExp_sd
     <fct>          <dbl>
#> 1 Africa         9.63
#> 2 Americas       4.44
#> 3 Asia           7.96
#> 4 Europe         2.98
#> 5 Oceania        0.729

cobriant/qelp documentation built on July 1, 2022, 7:24 a.m.