You can try this:
newData <- lapply(list(df1, df2), function(x)split(x[-1], x$lgdcm))
do.call('rbind', lapply(names(newData[[1]]),
function(x)newData[[1]][[x]]+newData[[2]][[x]]))
On 04/03/2008, Luis Ridao Cruz <[EMAIL PROTECTED]> wrote:
> R-help,
>
> I have two data frames df1 and df2:
>
> >head(df1)
> lgdcm 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
> 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
> 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
> 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
> 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
> 4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
> 5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
> ...
> ...
>
> > head(df2)
> lgdcm 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
> 34 NA NA 1 NA NA NA NA NA NA NA NA NA NA NA NA NA
> 36 NA NA 1 NA NA NA NA NA NA NA NA NA NA NA NA NA
> 40 NA NA 1 1 NA NA NA NA NA NA NA NA NA NA NA NA
> 41 NA NA NA NA 3 NA NA NA NA NA NA NA NA NA NA NA
> 42 NA NA NA NA 7 NA NA NA NA NA NA NA NA NA NA NA
> 43 NA NA NA 1 6 NA NA NA NA NA NA NA NA NA NA NA
> ....
> ....
>
> I want to fill up the columns of df1 (0,1,2,,,,15)
> with columns from df2 (0,1,2,,,,15) with column 'lgdcm' as the
> criterion for matching.
>
> There is a function in excel which does this type of thing, something
> like:
> SUMIF(range,criteria,sum_range)
>
> Can anyone help with this?
>
> Thanks in advance.
>
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> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
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>
--
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O
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