mlbench (version 2.0-0)

PimaIndiansDiabetes: Pima Indians Diabetes Database

Description

A data frame with 768 observations on 9 variables.

Usage

data(PimaIndiansDiabetes)
  data(PimaIndiansDiabetes2)

format

rl{ pregnant Number of times pregnant glucose Plasma glucose concentration (glucose tolerance test) pressure Diastolic blood pressure (mm Hg) triceps Triceps skin fold thickness (mm) insulin 2-Hour serum insulin (mu U/ml) mass Body mass index (weight in kg/(height in m)^2) pedigree Diabetes pedigree function age Age (years) diabetes Class variable (test for diabetes) }

source

• Original owners: National Institute of Diabetes and Digestive and Kidney Diseases
• Donor of database: Vincent Sigillito ([e-mail])

These data have been taken from the UCI Repository Of Machine Learning Databases at

• ftp://ftp.ics.uci.edu/pub/machine-learning-databases
• http://www.ics.uci.edu/~mlearn/MLRepository.html

and were converted to R format by Friedrich Leisch.

Details

The data set PimaIndiansDiabetes2 contains a corrected version of the original data set. While the UCI repository index claims that there are no missing values, closer inspection of the data shows several physical impossibilities, e.g., blood pressure or body mass index of 0. In PimaIndiansDiabetes2, all zero values of glucose, pressure, triceps, insulin and mass have been set to NA, see also Wahba et al (1995) and Ripley (1996).

References

Newman, D.J. & Hettich, S. & Blake, C.L. & Merz, C.J. (1998). UCI Repository of machine learning databases [http://www.ics.uci.edu/~mlearn/MLRepository.html]. Irvine, CA: University of California, Department of Information and Computer Science.

Brian D. Ripley (1996), Pattern Recognition and Neural Networks, Cambridge University Press, Cambridge. Grace Whaba, Chong Gu, Yuedong Wang, and Richard Chappell (1995), Soft Classification a.k.a. Risk Estimation via Penalized Log Likelihood and Smoothing Spline Analysis of Variance, in D. H. Wolpert (1995), The Mathematics of Generalization, 331-359, Addison-Wesley, Reading, MA.

Examples

data(PimaIndiansDiabetes)
  summary(PimaIndiansDiabetes)

  data(PimaIndiansDiabetes2)
  summary(PimaIndiansDiabetes2)