| which.na {splus2R} | R Documentation |
Returns an integer vector describing which values in the input vector, if any, are missing.
which.na(x)
x |
an R object, which should be of mode "logical", "numeric", or "complex". |
an integer vector describing which values in the input vector, if any, are missing.
anyMissing,
as.rectangular,
colIds,
colMaxs,
colMedians,
colMins,
colRanges,
colStdevs,
colVars,
deparseText,
ifelse1,
is.numeric.atomic.vector,
is.rectangular,
is.missing,
is.zero,
lowerCase,
oldUnclass,
numCols,
numRows,
peaks,
positions,
rowIds,
rowMaxs,
rmvnorm,
stdev,
subscript2d,
upperCase,
vecnorm.
## A non-zero number divided by zero creates ## infinity, zero over zero creates a NaN weird.values <- c(1/0, -20.9/0, 0/0, NA) ## Produces: 3 4. In this example, the which.na ## expression and the subscript expression ## involving is.na should return the same value which.na(weird.values) seq(along=weird.values)[is.na(weird.values)]