agree.wscv {agRee} | R Documentation |
Obtain confidence interval and point estimate of the within-subject coefficient of variation (WSCV).
agree.wscv(ratings, conf.level=0.95, method=c("vst", "delta"),
NAaction=c("fail", "omit"))
ratings |
a matrix of observations with one subject per row and one rater per column. |
conf.level |
confidence level of the interval. The default is 0.95. |
method |
a character string specifying the method used to obtain confidence interval of the WSCV. It must be one of "vst" and "delta" and may be abbreviated. The default is "vst". |
NAaction |
a character string specifying what should happen
when the data contain |
The point estimate is based on what proposed in Quan and Shih (1996). To obtain confidence interval, the methods available include the delta method proposed in Quan and Shih (1996) and the variance stabilizing transformation in Shoukri et al. (2006).
Point estimate of the WSCV and lower and upper bounds of the confidence interval.
Hui Quan and Weichung J. Shih (1996) Assessing reproducibility by the within-subject coefficient of variation with random effects models. Biometrics 52 1195-1203
Mohamed M Shoukri, Nasser Elkum and Stephen D Walter (2006) Interval estimation and optimal design for the within-subject coefficient of variation for continuous and binary variables. BMC Medical Research Methodology 6 24
data(lesionBurden)
agree.wscv(lesionBurden.M)