Number of variable pairs
nPairs counts the number of pairs between variables.
nPairs(x, margin=FALSE, names=TRUE, abbrev=TRUE, ...)
x |
data.frame or a matrix |
margin |
logical, calculate the cumulative number of “pairs” |
names |
logical, add row/col-names to the output |
abbrev |
logical, abbreviate names |
... |
other arguments passed to |
The class of returned matrix is nPairs and matrix. There is a summary method, which shows the opposite information - counts how many times each variable is known, while the other variable of a pair is not. See examples.
Matrix of order k, where k is the number of columns in x.
Values in a matrix represent the number of pairs between columns/variables in
x. If margin=TRUE, the number of columns is k+1 and the
last column represents the cumulative number of pairing all variables.
Gregor Gorjanc
## Test data
test <- data.frame(V1=c(1, 2, 3, 4, 5),
V2=c(NA, 2, 3, 4, 5),
V3=c(1, NA, NA, NA, NA),
V4=c(1, 2, 3, NA, NA))
## Number of variable pairs
nPairs(x=test)
## Without names
nPairs(x=test, names=FALSE)
## Longer names
colnames(test) <- c("Variable1", "Variable2", "Variable3", "Variable4")
nPairs(x=test)
## Margin
nPairs(x=test, margin=TRUE)
## Summary
summary(object=nPairs(x=test))Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.