R help - Mar 2015 - help on output my own function result in ddply

Hi, 

  There is a lot of if-else statement.  r syntax rejects them.  Here is an
example of if-else example.  In r we can code *ifelse(x>2,y <-
1,ifelse(x>1,y <- 0.5, y <- 0))* for the following.

if (x > 2) 
{
  y = 1
}
else
{
  if (x > 1)
  { 
     y = 0.5
  }
  else 
  {
     y = 0
  }
}




-----
JS Huang
--
View this message in context:
http://r.789695.n4.nabble.com/help-on-output-my-own-function-result-in-ddply-tp4704238p4704240.html
Sent from the R help mailing list archive at Nabble.com.

Hi,

On Thursday, March 5, 2015, JS Huang <js.huang at protective.com> wrote:
> Hi,
>
>   There is a lot of if-else statement.  r syntax rejects them.  Here is an
> example of if-else example.  In r we can code *ifelse(x>2,y <-
> 1,ifelse(x>1,y <- 0.5, y <- 0))* for the following.

I'm not sure what you are talking about: if-else is a valid construct in R,
and NOT synonymous with ifelse().

Your construct below is wrong, though, because the curly brace on a line
alne tells R that you're done. Instead you need

if(x > 2) {
   y <- 1
} else {
   y <- 0
}

and these can be nested at will. Note that else is on the same line as the
curly brace ending the if statement.

http://cran.r-project.org/doc/manuals/R-lang.html#if

>
> if (x > 2)
> {
>   y = 1
> }
> else
> {
>   if (x > 1)
>   {
>      y = 0.5
>   }
>   else
>   {
>      y = 0
>   }
> }
>
>
>
>
> -----
> JS Huang
> --
> View this message in context:
>
http://r.789695.n4.nabble.com/help-on-output-my-own-function-result-in-ddply-tp4704238p4704240.html
> Sent from the R help mailing list archive at Nabble.com.

Nabble is not the R help mailing list archive, and if you don't include
context in your post the real R help list will have little idea what you're
talking about.

>
> ______________________________________________
> R-help at r-project.org <javascript:;> mailing list -- To UNSUBSCRIBE
and
> more, see
> 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.
>
Instead, you could actually sign up for the mailing list.

Sarah



-- 
Sarah Goslee
http://www.stringpage.com
http://www.sarahgoslee.com
http://www.functionaldiversity.org

	[[alternative HTML version deleted]]

On Mar 5, 2015 8:32 PM, "Sarah Goslee" <sarah.goslee at
gmail.com> wrote:
>
>  Hi,
>
> On Thursday, March 5, 2015, JS Huang <js.huang at protective.com>
wrote:
>
> > Hi,
> >
> >   There is a lot of if-else statement.  r syntax rejects them.  Here
is
an
> > example of if-else example.  In r we can code *ifelse(x>2,y <-
> > 1,ifelse(x>1,y <- 0.5, y <- 0))* for the following.
>
>
> I'm not sure what you are talking about: if-else is a valid construct
in
R,
> and NOT synonymous with ifelse().
>
> Your construct below is wrong, though, because the curly brace on a line
> alne tells R that you're done. Instead you need
>
> if(x > 2) {
>    y <- 1
> } else {
>    y <- 0
> }
>
> and these can be nested at will. Note that else is on the same line as the
> curly brace ending the if statement.
>
> http://cran.r-project.org/doc/manuals/R-lang.html#if
>
>
> >
> > if (x > 2)
> > {
> >   y = 1
> > }
> > else
> > {
> >   if (x > 1)
> >   {
> >      y = 0.5
> >   }
> >   else
> >   {
> >      y = 0
> >   }
> > }
> >
> >
> >
> >
> > -----
> > JS Huang
> > --
> > View this message in context:
> >
http://r.789695.n4.nabble.com/help-on-output-my-own-function-result-in-ddply-tp4704238p4704240.html
> > Sent from the R help mailing list archive at Nabble.com.
>
>
> Nabble is not the R help mailing list archive, and if you don't include
> context in your post the real R help list will have little idea what
you're
> talking about.
Yes, it has happened before and is really confusing to the r-help list.  It
occurs when the original message is posted by a user on Nabble who is not
on the r-help list - then that message is held for moderation/discarded.
Then another Nabble user, who is on also the r-help list, respond via
Nabble and then we only see that reply over here at r-help.  Second user
who reply is probably unaware of this (though the Nabble interface says
"This post has NOT been accepted by the mailing list yet.") and makes
it
look like s/he is posting random text/code.

It would be useful if our mailing list server could filter out/block such
threads, but that is probably not that easy to do.

Henrik
>
>
> >
> > ______________________________________________
> > R-help at r-project.org <javascript:;> mailing list -- To
UNSUBSCRIBE and
> > more, see
> > 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.
> >
>
> Instead, you could actually sign up for the mailing list.
>
> Sarah
>
>
>
> --
> Sarah Goslee
> http://www.stringpage.com
> http://www.sarahgoslee.com
> http://www.functionaldiversity.org
>
>         [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> 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.
	[[alternative HTML version deleted]]