'Apply' giving me errors
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 -- View this message in context: http://r.789695.n4.nabble.com/Apply-giving-me-errors-tp3923880p3923880.html Sent from the R help mailing list archive at Nabble.com.
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