US Births

Description

Number of births each day from 1968 to 1988

Usage

data(Births)

Format

A data.frame with 7305 observations on the following 8 variables.

• date Date

• births Number of births on date (integer)

• wday Day of week (ordered factor)

• year Year (integer)

• month Month (integer)

• day_of_year Day of year (integer)

• day_of_month Day of month (integer)

• day_of_week Day of week (integer)

Details

The number of births in Births78 is slightly lower than the number of births in this data set for the year 1978. See the examples.

Source

Data source: National Vital Statistics System natality data, as provided by Google BigQuery and exported to csv Robert Kern (http://www.mechanicalkern.com/static/birthdates-1968-1988.csv)

See Also

Births2015, Births.

Examples

data(Births)
if(require(ggplot2)) {
  ggplot(data = Births, aes(x = date, y = births, colour = ~ wday)) +
    stat_smooth(se = FALSE, alpha = 0.8, geom = "line")
  ggplot(data = Births, aes(x = day_of_year, y = births, colour = ~ wday)) +
    geom_point(size = 0.4, alpha = 0.5) +
    stat_smooth(se = FALSE, geom = "line", alpha = 0.6, size = 1.5)
  if (require(dplyr)) {
    ggplot(
     data =  bind_cols(Births %>% filter(year == 1978), 
                       Births78 %>% rename(births78 = births)),
     aes(x = births - births78)
     ) +
     geom_histogram(binwidth = 1)
  }
}