| ifelse1 {splus2R} | R Documentation |
This is equivalent to {if(test) x else y} . The main advantage of using this function is better formatting, and a more natural syntax when the result is being assigned; see examples below.
With 5 arguments, this is equivalent to {if(test1) x else if(test2) u else v} (where arguments are given by name, not position).
In ifelse1, is.numeric.atomic.vector, test should be a single value, and the calculations for y (or x) are not performed if it is not selected. In contrast, for ifelse, test is normally a vector, both x and y are evaluated, even if not used, and x and y are vectors the same length as test.
ifelse1(test, x, y, ...)
test |
logical value; if TRUE return x. |
x |
any object; this is returned if test is TRUE. |
y |
any object; this is returned if test is FALSE. |
... |
there should be 3, 5, 7, etc. arguments to this function; arguments 1, 3, 5, etc. should be logical values; the other arguments (even numbered, and last) are objects that may be returned. |
with three arguments, one of x or y. With k arguments, one of arguments 2, 4, ..., k-1, k.
anyMissing,
as.rectangular,
colIds,
colMaxs,
colMedians,
colMins,
colRanges,
colStdevs,
colVars,
deparseText,
is.rectangular,
is.missing,
is.zero,
lowerCase,
oldUnclass,
numCols,
numRows,
peaks,
positions,
rowIds,
rowMaxs,
rmvnorm,
stdev,
subscript2d,
upperCase,
vecnorm,
which.na.
ifelse1(TRUE, "cat", "dog") ifelse1(FALSE, "one", FALSE, "two", "three")