| 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:
rrrmmrmm
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))