| sbp {MethComp} | R Documentation |
For each subject (item) there are three replicate measurements by
three methods (two observers, J and R and the automatic machine,
S). The replicates are linked within (method,item).
data(sbp)
A data frame with 765 observations on the following 4 variables:
methJ(observer
1), R(observer 2) and S(machine)itemreplyThe dataset is adapted from table 1 in: JM Bland and DG Altman: Measuring agreement in method comparison studies. Statistical Methods in Medical Research, 8:136-160, 1999. Originally supplied to Bland & Altman by E. O'Brien, see: Altman DG, Bland JM. The analysis of blood pressure data. In O'Brien E, O'Malley K eds. Blood pressure measurement. Amsterdam: Elsevier, 1991: 287-314.
data(sbp) par( mfrow=c(2,2), mar=c(4,4,1,4) ) BA.plot( sbp, comp=1:2 ) BA.plot( sbp, comp=2:3 ) BA.plot( sbp, comp=c(1,3) )