md.pairs {mice} | R Documentation |
Number of observations per variable pair.
md.pairs(data)
data |
A data frame or a matrix containing the incomplete data.
Missing values are coded as NA . |
The four components in the output value is have the following interpretation:
rr
rm
mr
mm
A list of four components named rr
, rm
, mr
and mm
.
Each component is square numerical matrix containing the number observations
within four missing data pattern.
Stef van Buuren, Karin Oudshoorn, 2009
Van Buuren, S., Groothuis-Oudshoorn, K. (2009) MICE: Multivariate Imputation by Chained Equations in R. Journal of Statistical Software, forthcoming. http://www.stefvanbuuren.nl/publications/MICE in R - Draft.pdf
pat <- md.pairs(nhanes) pat # show that these four matrices decompose the total sample size # for each pair pat$rr + pat$rm + pat$mr + pat$mm # percentage of usable cases to impute row variable from column variable round(100*pat$mr/(pat$mr+pat$mm))