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volume
2012 Sep 18
2
Formula in a data-frame
...39;) , summarise,
Frequency = sum (Occurrence))
Volume = ddply (dieta, c('Specie','Fooditem') , summarise, Volume =
sum (Volume))
and calculate total frequency and total volume for a given specie:
TFrequency = ddply (Frequency, 'Specie' , summarise, TF = sum (Frequency))
TVolume = ddply (dieta, c('Specie') , summarise, Volume = sum (Volume))
but once they have different length, I could not use together to
create a percentage needed in my formula.
Any suggestions?
Thanks in advanced for help and attention,
Raoni
dput (diet)
structure(list(Specie = structure(c(...