vcf {VarReg}

vcf dataset.

Description

A dataset containing 100 observations of mean velocity of circumferential fibre shortening (vcf), made by long axis and short axis echocardiography.

Usage

vcf

Format

A data frame with 133 rows and 3 variables:

pid

patient identifier

vcflong

vcf measurement from long axis

vcfshort

vcf measurement from short axis

...

Source

Data from Bland JM, Altman DG. (1986) Statistical methods for assessing agreement between two methods of clinical measurement. Lancet i, 307-310. (Supplied by Paul D'Arbela)

Examples

library(VarReg)
data(vcf)
attach(vcf)
plot(rowMeans(vcf[-1]),vcf$vcflong-vcf$vcfshort)