IfElse
From resample v0.4
by Tim Hesterberg
Conditional Data Selection
This is equivalent to {if(test) yes else no}
.
The advantages of using this function are 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) yes else if(test2) u else v}
(where arguments are given by name, not position).
- Keywords
- utilities
Usage
IfElse(test, yes, no, ...)
Arguments
- test
- logical value; if
TRUE
returnyes
. - yes
- any object; this is returned if
test
isTRUE
. - no
- normally any object; this is returned if
test
isFALSE
. If there are more than three arguments this should be logical. - ...
- 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.
Details
test
should be a scalar logical, and only one of yes
or
no
is evaluated, depending on whether test = TRUE
or
test = FALSE
, and yes
and no
may be any objects.
In contrast, for
ifelse
, test is normally a vector, both yes
and no
are evaluated, even if
not used, and yes
and no
are vectors the same length as
test
.
Value
-
with three arguments, one of
yes
or no
.
With k arguments, one of arguments 2, 4, ..., k-1, k.
See Also
Examples
IfElse(TRUE, "cat", "dog")
IfElse(FALSE, "one", TRUE, "two", "three")
IfElse(FALSE, "one", FALSE, "two", "three")
Community examples
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