| urine {SMPracticals} | R Documentation |
Urine Analysis Data
Description
The 'urine' data frame has 79 rows and 7 columns.
79 urine specimens were analyzed in an effort to determine if certain physical characteristics of the urine might be related to the formation of calcium oxalate crystals. Cases 1 and 55 have missing covariates.
Usage
data(urine)Format
This data frame contains the following columns:
- r
Indicator of the presence of calcium oxalate crystals.
- gravity
The specific gravity of the urine.
- ph
The pH reading of the urine.
- osmo
The osmolarity of the urine. Osmolarity is proportional to the concentration of molecules in solution.
- cond
The conductivity of the urine. Conductivity is proportional to the concentration of charged ions in solution.
- urea
The urea concentration in millimoles per litre.
- calc
The calcium concentration in millimoles per litre.
Source
Andrews, D.F. and Herzberg, A.M. (1985) Data: A Collection of Problems from Many Fields for the Student and Research Worker. Springer-Verlag. Pages 249–251.
Examples
data(urine)
glm(r~gravity+ph+osmo+cond+urea+calc,binomial,data=urine,subset=-c(1,55))