PairedData (version 0.9.1)

plotBA: Bland-Altman plot

Description

Produce a Bland-Altman plot for paired data, including a confidence region for the mean of the differences.

Usage

## S3 method for class 'paired':
plotBA(object,groups=NULL,facet=TRUE,...)

Arguments

object

an object of class paired.

groups

factor corresponding to groups (optional).

facet

faceting or grouping strategy for plotting?

...

arguments to be passed to methods

Value

• a graphical object of class ggplot.

References

• J.M. Bland and D.G. Altman. Measuring agreement in method comparison studies. Statistical Methods in Medical Research, 8, 135-160, 1999.
• D.M. Meek. Two macros for producing graphs to assess agreement between two variables. In Proceedings of Midwest SAS Users Group Annual Meeting, October 2007.

See Also

tmd

Examples

data(PrisonStress)
with(PrisonStress,plotBA(paired(PSSbefore,PSSafter)))
with(PrisonStress,plotBA(paired(PSSbefore,PSSafter),
groups=Group))
with(PrisonStress,plotBA(paired(PSSbefore,PSSafter),
groups=Group,facet=FALSE))