Peter,
Your example doesn't work for me unless I
set options(stringsAsFactors=TRUE) first.
(If I do set that, then all columns of 'results'
have class "character", which I doubt the user
wants.)
> results <- data.frame()
>
> n = 10
> for(i in 1:n){
+ a = LETTERS[i];
+ b = i;
+ c = 3*i + 2
+ d = rnorm(1);
+ results <- rbind(results, c(a,b,c,d))
+ }
There were 36 warnings (use warnings() to see them)
> warnings()[1:5]
$`invalid factor level, NAs generated`
`[<-.factor`(`*tmp*`, ri, value = "B")
$`invalid factor level, NAs generated`
`[<-.factor`(`*tmp*`, ri, value = "2")
$`invalid factor level, NAs generated`
`[<-.factor`(`*tmp*`, ri, value = "8")
$`invalid factor level, NAs generated`
`[<-.factor`(`*tmp*`, ri, value = "-0.305558353507095")
$`invalid factor level, NAs generated`
`[<-.factor`(`*tmp*`, ri, value = "C")
> results
X.A. X.1. X.5. X.1.43055780028799.
1 A 1 5 1.43055780028799
2 <NA> <NA> <NA> <NA>
3 <NA> <NA> <NA> <NA>
4 <NA> <NA> <NA> <NA>
5 <NA> <NA> <NA> <NA>
6 <NA> <NA> <NA> <NA>
7 <NA> <NA> <NA> <NA>
8 <NA> <NA> <NA> <NA>
9 <NA> <NA> <NA> <NA>
10 <NA> <NA> <NA> <NA>
Bill Dunlap
Spotfire, TIBCO Software
wdunlap tibco.com
> -----Original Message-----
> From: r-help-boun...@r-project.org
> [mailto:r-help-boun...@r-project.org] On Behalf Of Peter Langfelder
> Sent: Thursday, November 11, 2010 12:25 PM
> To: Noah Silverman
> Cc: r-help@r-project.org
> Subject: Re: [R] Populating then sorting a matrix and/or data.frame
>
> On Thu, Nov 11, 2010 at 11:33 AM, Noah Silverman
> <n...@smartmediacorp.com> wrote:
> > Still doesn't work.
> >
> > When using rbind to build the data.frame, it get a
> structure mostly full of
> > NA.
> > The data is correct, so something about pushing into the
> data.frame is
> > breaking.
> >
> > Example code:
> > results <- data.frame()
> >
> > for(i in 1:n){
> > #do all the work
> > #a is a test label. b,c,d are numeric.
> > results <- rbind(results, c(a,b,c,d))
> > }
>
> Works for me:
>
> results <- data.frame()
>
> n = 10
> for(i in 1:n){
> a = LETTERS[i];
> b = i;
> c = 3*i + 2
> d = rnorm(1);
> results <- rbind(results, c(a,b,c,d))
> }
>
>
> > results
>
> X.A. X.1. X.5. X.0.142223304589023.
> 1 A 1 5 0.142223304589023
> 2 B 2 8 0.243612305595176
> 3 C 3 11 0.476795513990516
> 4 D 4 14 1.0278220664213
> 5 E 5 17 0.916608672305205
> 6 F 6 20 1.61075985995586
> 7 G 7 23 0.370423691258896
> 8 H 8 26 -0.0528603547004191
> 9 I 9 29 -2.07888666920403
> 10 J 10 32 -1.87980721733655
>
> Maybe there's something wrong with the calculation you do?
>
> Peter
>
> ______________________________________________
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>
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