Bonjour chers tous
j'ai des difficultes à utiliser les commandes que j'utilisai
VOICI LE ERREURS qui s'affiche
setwd("C:/FORMATION")
> biomass<-read.csv("Hbiomass.csv",sep=";", dec=",")
> attach(biomass)
> str(biomass)
'data.frame': 42 obs. of 1 variable:
$ espece.dbh.haut.houp.dens.Bbran.Bfol.Btronc.Bctf.Btot: chr " utilis,7,
> model1<-lm( log(Bfol) ~ I(log(Db)), data = biomass)
Error in eval(predvars, data, env) : object 'Bfol' not found
> model1<-lm( log(Btot) ~ I(log(Db)), data = biomass)
Error in eval(predvars, data, env) : object 'Btot' not found
> model3<-lm( log(Bbran) ~ I(log(DBH^2*haut)), data = biomass)
Error in eval(predvars, data, env) : object 'Bbran' not found
> model1<-lm( log(Bfol) ~ I(log(dbh)), data = biomass)
Error in eval(predvars, data, env) : object 'Bfol' not found
> model1<-lm( log(Btot) ~ I(log(dbh)), data = biomass)
Error in eval(predvars, data, env) : object 'Btot' not found
> model3<-lm( log(Bbran) ~ I(log(dbh^2*haut)), data = biomass)
Error in eval(predvars, data, env) : object 'Bbran' not found
> model<-lm(log(Btat)~log(Db)+log(haut)+log(dens), data=biomass)
Error in eval(predvars, data, env) : object 'Btat' not found
AVEC UN AUTRE FICHE C'EST LE MEME PROBLEME
setwd("C:/FORMATION")
> biomass<-read.csv("basallegumm.csv",sep=";", dec=",")
> attach(biomass)
> str(biomass)
'data.frame': 45 obs. of 1 variable:
$ Nom.de.l.espŠce.Db..DBH.haut.dens.bfol.bbran.btronc.btot:
> model1<-lm( log(bfol) ~ I(log(Db)), data = biomass)
Error in eval(expr, envir, enclos) : object 'bfol' not found
> model2<-lm( log(bfol) ~ I(log(Db)) + I(log(haut)), data = biomass)
Error in eval(expr, envir, enclos) : object 'bfol' not found
> model3<-lm( log(bfol) ~ I(log(Db^2*haut)), data = biomass)
Error in eval(expr, envir, enclos) : object 'bfol' not found
MERCI D'AVANCE