[R] weird pasting of ".value" when list is returned

[Charles C. Berry]

On Sat, 13 Dec 2008, markleeds at verizon.net wrote:

> could someone explain why the name of FPVAL gets " .value" concatenated onto 
> it when the code below is run and temp is returned.
> I've been trying to figure this out for too long. It doesn't matter when I 
> put the FPVAL in the return statement. It happens regardless of
> whether it's first or last.   Thanks.

Mark,


It is because the sole element of fpval is named 'value'. Check this:

> foo<-function() return(list(a=1,b=c(x=c(value=1),y=c(nother.name=2))))
> foo()
$a
[1] 1

$b
       x.value y.nother.name
             1             2

HTH,

Chuck

>
> f.lmmultenhanced <-
> function(response, pred1, pred2)
>
> {
>
>         regmod <- lm(response ~ pred1 + pred2)
>         lmsum <- summary(regmod)
>
>         imbcoef<-lmsum$coefficients[2,1]
>         retcoef<-lmsum$coefficients[3,1]
>
>         imbpval<-lmsum$coefficients[2,4]
>         retpval<-lmsum$coefficients[3,4]
>
>        Fstat<-lmsum$fstatistic[1]
>
> fpval<-pf(Fstat,lmsum$fstatistic[2],lmsum$fstatistic[3],lower=FALSE)
>
>
> return(list(categrsp=response,pred1=pred1,pred2=pred2,regmod=regmod,
>
> rest=c("FPVAL"=fpval,"IMBCOEF"=imbcoef,"RETCOEF"=retcoef,"IMBPVAL"=imbpval,"RETPVAL"=retpval)
>                    )) 
>
> }
>
>
> x <- 10 + 1:100
> y <- 5 +  seq(2,200,by=2)
> z <- 2*x + 3*y + rnorm(100)
>
> temp <- f.lmmultenhanced(x,y,z)
> print(temp)
>
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Charles C. Berry                            (858) 534-2098
                                             Dept of Family/Preventive Medicine
E mailto:cberry at tajo.ucsd.edu	            UC San Diego
http://famprevmed.ucsd.edu/faculty/cberry/  La Jolla, San Diego 92093-0901