Message-ID: <4EA13128.8020707@statistik.tu-dortmund.de>
Date: 2011-10-21T08:45:28Z
From: Uwe Ligges
Subject: 'Apply' giving me errors
In-Reply-To: <1319155776857-3923880.post@n4.nabble.com>
On 21.10.2011 02:09, kickout wrote:
> So i have a simple function:
>
> bmass=function(y){
> weight=y$WT*y$MSTR
> return(bio)
> }
>
> And want to apply to a whole bunch of rows in my data.frame:
>
> final1=apply(final,1,yldbu)
>
>
> BUT...recieve the following error:
> "Error in y$WT : $ operator is invalid for atomic vectors"
>
>
> However when i try:
>> final[1,]$WT*final[1,]$MSTR
> [1] 156.3
>
>
> It gives me the correct answer....what is apply not liking in my code?
Since apply passes the rows as vectors into your function, not as a
data.frame of 1 row.
I woder why you need apply() at all, since
final$WT * final$MSTR
should do.
Uwe Ligges
>
> Thanks
>
>
>
> --
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>
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