if() command

Hi 

Sorry, I am not sure why sometimes is a text from my answeres 
stripped off.

Ok Petr, I run your suggestion and I got this message: 

 > age<-sample(seq(10,50,10), 20, replace=T) 
 > 
 > if (age <=10) {group <- 1} else if (age > 10 & age <= 20)  
{group <-

2} else {group <- 3} 
Warning message: 
the condition has length > 1 and only the first element will be  
used
in: if (age <= 10) { 

What does it means ? 
Others has already answered it but I told you that if command is  
not vhat you probably want and suggested to use cut e.g.

cutvector <- c(0,10,20,100) 
group <- as.numeric(cut(age,cutvector)) 

You can change your cutvector according to your wish anytime  
before calling the second function 

HTH 
Petr

And when I look to the database I have no new classification ! 

Could you help please ? 

Mauricio 

Petr Pikal escreveu: 

Hallo 

On 13 Sep 2005 at 10:29, Carlos Maur??cio Cardeal Mende  
wrote:

Hi everyone ! 

Could you please help me with this problem ? 

I??ve trying to write a code that assign to a variable the  
content
from another, but all I??ve got is a message error. For  
example:
if (age <=10) {group == 1} 
else if (age > 10 & age <= 20) {group == 2} 
else {group == 3} 
if you put your statement on one line it works (at least it does  
not
give you syntax error) but the result is hardly what you really 
expect 

age<-sample(seq(10,50,10), 20, replace=T) 

if (age <=10) {group <- 1} else if (age > 10 & age <= 20)  
{group <-
2} else {group <- 3} if (age <=10) {group == 1} else if (age >  
10 &
age <= 20) {group == 2} else {group == 3} 

Maybe you want something like 

group<-as.numeric(cut(age,c(0,10,20,100))) 

but it is only guess 

HTH 
Petr 

Syntax error 

Or 

if (age <=10) {group == 1} 
else (age > 10 & age <= 20) {group == 2} 
else {group == 3} 

Syntax error 

I know that is possible to find the solution by ifelse command  
or
even recode command, but I??d like to use this way, because I  
can
add another variable as a new condition and I believe to  
expand the
possibilites. 

Thanks, 
Mauricio 

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Petr Pikal
petr.pikal at precheza.cz
"Petr" == Petr Pikal <petr.pikal at precheza.cz>
    on Thu, 15 Sep 2005 13:27:43 +0200 writes:
Petr> Hi 
    Petr> Sorry, I am not sure why sometimes is a text from my answeres 
    Petr> stripped off.

Hi Petr,
it's when you don't follow the posting guide _and_ simultaneously
happen to fool the filters so that something is posted at all:

The one you mention from this morning was full of HTML crap,
(wc on the body gave "302  1491 17036"), but wasn't correctly
recognized as HTML by one part of the filters but by the others
(that strip HTML).

      [ If the filters worked as intended currently, such a message
        would be completely swallowed by the filters! ]

Regards, Martin
Hi Martin

It sometimes happens when I respond to somebodys question. 
When I post my own I try to follow the posting guide closely and 
do not use HTML crap at all. 

I just do not know how to recognize that my response has this 
unwanted residues and how to get rid of them before I actually 
find that the message is stripped off.

I am using Pegassus Mail 4.21c.

Thanks
Petr

"Petr" == Petr Pikal <petr.pikal at precheza.cz>
    on Thu, 15 Sep 2005 13:27:43 +0200 writes:
    Petr> Hi 
    Petr> Sorry, I am not sure why sometimes is a text from my
    answeres Petr> stripped off.

Hi Petr,
it's when you don't follow the posting guide _and_ simultaneously
happen to fool the filters so that something is posted at all:

The one you mention from this morning was full of HTML crap,
(wc on the body gave "302  1491 17036"), but wasn't correctly
recognized as HTML by one part of the filters but by the others
(that strip HTML).

      [ If the filters worked as intended currently, such a message
        would be completely swallowed by the filters! ]

Regards, Martin

______________________________________________
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
Petr Pikal
petr.pikal at precheza.cz