A day by day record of the number of births in each US State.

data(Birthdays)

Format

A data frame with 374221 observations on the following variables.

  • state state where child was born

  • year year (1969-1988)

  • month month (1-12)

  • day day of month

  • date date as a date object

  • births number of births

See also

Births, Births78, Births2015, BirthsSSA, BirthsCDC for data sets that are aggregated at the level of the entire country.

Examples

data(Birthdays)
if (require(mosaic)) {
  MI <- Birthdays %>% filter(state == "MI")
  gf_point(births ~ date, Birthdays, data = MI)
  gf_line(births ~ date, Birthdays, data = MI, color = ~ wday)
  gf_line(births ~ date,
    data = Birthdays %>% group_by(date) %>% summarise(births = sum(births)))
  }
#> Loading required package: mosaic
#> Registered S3 method overwritten by 'mosaic':
#>   method                           from   
#>   fortify.SpatialPolygonsDataFrame ggplot2
#> 
#> The 'mosaic' package masks several functions from core packages in order to add 
#> additional features.  The original behavior of these functions should not be affected by this.
#> 
#> Attaching package: ‘mosaic’
#> The following objects are masked from ‘package:dplyr’:
#> 
#>     count, do, tally
#> The following object is masked from ‘package:Matrix’:
#> 
#>     mean
#> The following object is masked from ‘package:ggplot2’:
#> 
#>     stat
#> The following objects are masked from ‘package:stats’:
#> 
#>     IQR, binom.test, cor, cor.test, cov, fivenum, median, prop.test,
#>     quantile, sd, t.test, var
#> The following objects are masked from ‘package:base’:
#> 
#>     max, mean, min, prod, range, sample, sum