R help - Apr 2010 - writing function ( 'plot' and 'if') problem

==========================myf=function(ds=1){
x=rnorm(10)
y=rnorm(10)

{ #start of if
if (ds==1)
{
list(x,y)
}

else (ds==2)
{
plot(x,y)
}

} # end of if

} # end of function
==========================
Hi All,

the problem i am having here is,
that I want to be able to control the display,
lf ds=1, i want to just have a list,

but it seem to always plot...

Thanks.

casper
-- 
View this message in context:
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Sent from the R help mailing list archive at Nabble.com.

Tena koe Caspar

Try removing the (ds==2) - I'm not sure how you expect R to interpret
that.

HTH ....

Peter Alspach
> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] On Behalf Of casperyc
> Sent: Wednesday, 14 April 2010 10:42 a.m.
> To: r-help at r-project.org
> Subject: [R] writing function ( 'plot' and 'if') problem
> 
> 
> ==========================> myf=function(ds=1){
> x=rnorm(10)
> y=rnorm(10)
> 
> { #start of if
> if (ds==1)
> {
> list(x,y)
> }
> 
> else (ds==2)
> {
> plot(x,y)
> }
> 
> } # end of if
> 
> } # end of function
> ==========================> 
> Hi All,
> 
> the problem i am having here is,
> that I want to be able to control the display,
> lf ds=1, i want to just have a list,
> 
> but it seem to always plot...
> 
> Thanks.
> 
> casper
> --
> View this message in context: http://n4.nabble.com/writing-function-
> plot-and-if-problem-tp1839091p1839091.html
> Sent from the R help mailing list archive at Nabble.com.
> 
> ______________________________________________
> R-help at r-project.org 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.

On Apr 13, 2010, at 5:41 PM, casperyc wrote:
>
> ==========================> myf=function(ds=1){
> x=rnorm(10)
> y=rnorm(10)
>
> { #start of if
> if (ds==1)
> {
> list(x,y)
> }
>
> else (ds==2)
?"if"

That seems odd. I would expect this function to return TRUE or FAKSE  
rather than proceeding to a plot function. There is not usually a  
condition following the else{} step.

-- 
David.
> {
> plot(x,y)
> }
>
> } # end of if
>
> } # end of function
> ==========================>
> Hi All,
>
> the problem i am having here is,
> that I want to be able to control the display,
> lf ds=1, i want to just have a list,
>
> but it seem to always plot...
>
> Thanks.
>
> casper
> -- 
> View this message in context:
http://n4.nabble.com/writing-function-plot-and-if-problem-tp1839091p1839091.html
> Sent from the R help mailing list archive at Nabble.com.
>
> ______________________________________________
> R-help at r-project.org 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.

On Apr 13, 2010, at 5:41 PM, casperyc wrote:
>
> ==========================> myf=function(ds=1){
> x=rnorm(10)
> y=rnorm(10)
>
> { #start of if
> if (ds==1)
> {
> list(x,y)
> }
>
> else (ds==2)
> {
> plot(x,y)
> }
>
> } # end of if
>
> } # end of function
> ==========================>
> Hi All,
>
> the problem i am having here is,
> that I want to be able to control the display,
> lf ds=1, i want to just have a list,a
Perhaps taking out the entirely extraneous condition for else and  
"linking up" the else clause:

myf=function(ds=1){
  x=rnorm(10)
  y=rnorm(10)

   #start of if
  if (ds==1)
  {
  list(x,y)
  } else {
  plot(x,y) }

  } # end of if


 > myf(1)
[[1]]
  [1] -0.5738623  0.6937577 -1.0801386  0.9465693  1.0054440  
-1.5523713  1.5912727  0.5426036  1.8980418 -0.5922542

[[2]]
  [1] -1.4519795 -0.1556495 -2.5242081 -0.6671736  0.5947123  
-0.6051199 -1.3711271  0.1647910  0.1616131 -0.2563056

-- 
David.
>
> but it seem to always plot...
>
> Thanks.
>
> casper
> -- 
> View this message in context:
http://n4.nabble.com/writing-function-plot-and-if-problem-tp1839091p1839091.html
> Sent from the R help mailing list archive at Nabble.com.
>
> ______________________________________________
> R-help at r-project.org 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.