Hi everyone,
Do you know how to apply a If command to a vector in a data.frame, creating
a new column?
Example: If one species has "1" value in the Abundance column then it is
"Solitary". If the abundance is higher than 1, is "School".
I did:
aggregationFunction <-function(x){
(if (x>1) a<- 'School'
else a<- 'Solitary')
return (a)
}
Then:
Aggregation <- lapply (df$Number, aggregationFunction )
Then:
df <- data.frame (df, Aggregation)
And I got this error:
Error in data.frame(df, Aggregation) :
arguments imply differing number of rows: 2576, 1
Can you help me doing this function to a vector? Ive tried to find this
question and the answer online but I couldn't.
I tried also only with if but it is only for 1 length and the error was:
the condition has length > 1 and only the first element will be used
This question seemed easy in the beginning but I was not successful.
Thanks a lot for helping me.
Barbara
--
Bárbara H. Costa
Marine Biologist Researcher
SCIAENA - Marine Sciences and Cooperation
www.sciaena.org
bco...@ispa.pt
barbarahco...@gmail.com
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