births2006.smpl: Births in the United States, 2006

In nutshell: Data for "R in a Nutshell"

Description

This data set contains information on babies born in the United States during 2006. There is one record per birth. This data set is a random ten percent sample.

This data set is used as an example in the book "R in a Nutshell" from O'Reilly Media. Indices for observations from the original data set that are used in this sample are included in births2006.idx.

Usage

data(births2006.smpl)

Format

A data frame with 427323 observations on the following 13 variables.

DOB_MM

Month of date of birth

DOB_WK

Day of week of birth

MAGER

Mother's age

TBO_REC

Total birth order

WTGAIN

Weight gain by mother

SEX

a factor with levels F M, representing the sex of the child

APGAR5

APGAR score

DMEDUC

Mother's education level

UPREVIS

Number of prenatal visits

ESTGEST

Estimated weeks of gestation

DMETH_REC

Delivery Method

DPLURAL

"Plural Births;" levels include 1 Single, 2 Twin, 3 Triplet, 4 Quadruplet, and 5 Quintuplet or higher

DBWT

Birth weight, in grams

Source

http://www.cdc.gov/nchs/data_access/Vitalstatsonline.htm

Examples

data(births2006.smpl)
library(lattice)
histogram(~DBWT|DPLURAL,data=births2006.smpl)
densityplot(~DBWT,groups=DPLURAL,data=births2006.smpl,
  plot.points=FALSE,auto.key=TRUE)

Example output

Loading required package: nutshell.bbdb
Loading required package: nutshell.audioscrobbler

nutshell documentation built on May 1, 2019, 10:08 p.m.