[R] levene.test

[martanair]

I am trying to use Levene's test (of package car), but I do 
not understand quite well how to use it. '?levene.test' does 
not unfortunately provide any example. My data are in a data 
frame and correspond to 1 factor plus response. Could 
someone please give me an example about how to use the command 
   
levene.test(y, group) 
 
Thanks in advance, 
   
marta 
 
filedati=read.table("filedati.txt",header=TRUE)
filedati
modello=aov(filedati$y ~ filedati$fertilizzante)
anova(modello)
str(filedati$fertilizzante)
filedati$fertilizzante=factor(filedati$fertilizzante)
filedati$fertilizzante
library(car)
levene.test(filedati$y , filedati$fertilizzante)
 



filedati
 fertilizzante	x	y
1	55	502
1	60	532
1	48	525
1	44	444
1	63	527
1	60	531
1	50	478
1	56	530
1	54	547	
2	100	619
2	75	425
2	52	400
2	62	418
2	68	449
2	86	525
2	57	470
2	82	506
2	72	507
2	88	495
2	55	393
2	67	515
2	45	382
2	103	570
2	103	611
2	84	473

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