R help - Jan 2007 - if else statement

Hello,

    I'm doing some scripting and I've noticed that R doesn't seem to
have an
if (cond){
    do
}ifelse (cond) {
    do
} else {
    do
}

type block.

Is this correct or am I missing something.

THX

Paul

-- 
Research Technician
Mass Spectrometry
   o The
  /
o Scripps
  \
   o Research
  /
o Institute

On Thu, 18 Jan 2007 19:02:49 -0800,
"H. Paul Benton" <hpbenton at scripps.edu> wrote:
> Hello,
>     I'm doing some scripting and I've noticed that R doesn't
seem to
> have an
> if (cond){
>     do
> }ifelse (cond) {
>     do
> } else {
>     do
> }
> type block.

It's legal to join if else statements together:


if (cond) {
    do X
} else if (cond) {
    do Y
} else if (cond) {
    do Z
} else do W


-- 
Seb

?switch

"H. Paul Benton" <hpbenton at scripps.edu>
writes:
>     I'm doing some scripting and I've noticed that R doesn't
seem to
> have an
> if (cond){
>     do
> }ifelse (cond) {
>     do
> } else {
>     do
> }
> 
> type block.
> 
> Is this correct or am I missing something.
-- 
Jeff

Hi

also note the difference between if and ifelse. The former is similar 
to other languages

if (true or false codition) {do this} else {do that}

but

ifelse(logical vector, vector for true elements, vector for false 
elements)

see corespondent help pages.

HTH
Petr


On 18 Jan 2007 at 19:02, H. Paul Benton wrote:

Date sent:      	Thu, 18 Jan 2007 19:02:49 -0800
From:           	"H. Paul Benton" <hpbenton at scripps.edu>
To:             	r-help at stat.math.ethz.ch
Subject:        	[R] if else statement
> Hello,
> 
>     I'm doing some scripting and I've noticed that R doesn't
seem to
> have an if (cond){
>     do
> }ifelse (cond) {
>     do
> } else {
>     do
> }
> 
> type block.
> 
> Is this correct or am I missing something.
> 
> THX
> 
> Paul
> 
> -- 
> Research Technician
> Mass Spectrometry
>    o The
>   /
> o Scripps
>   \
>    o Research
>   /
> o Institute
> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html and provide commented,
> minimal, self-contained, reproducible code.
Petr Pikal
petr.pikal at precheza.cz