R devel - Sep 2016 - R-intro: length of 'ifelse' result

In "An Introduction to R" Version 3.3.1, in "9.2.1 Conditional
execution: if statements", the last paragraph is the following:
There is a vectorized version of the if/else construct, the ifelse function.
This has the form ifelse(condition, a, b) and returns a vector of the length of
its longest argument, with elements a[i] if condition[i] is true, otherwise
b[i].


In fact, ifelse(condition, a, b) returns a vector of the length of
'condition', even if 'a' or 'b' is longer.

On 14/09/2016 11:15 AM, Suharto Anggono Suharto Anggono via R-devel
wrote:
> In "An Introduction to R" Version 3.3.1, in "9.2.1
Conditional execution: if statements", the last paragraph is the following:
> There is a vectorized version of the if/else construct, the ifelse
function. This has the form ifelse(condition, a, b) and returns a vector of the
length of its longest argument, with elements a[i] if condition[i] is true,
otherwise b[i].
>
>
> In fact, ifelse(condition, a, b) returns a vector of the length of
'condition', even if 'a' or 'b' is longer.
Thanks, I'll fix that.

Duncan Murdoch