Dear R Help,
I have a set of data of heights of trees described by area that they are in. The
areas are numerical (0 to 7).
ht area
1 320 3
2 410 4
3 230 2
4 360 3
5 126 1
6 280 2
7 260 2
8 280 2
9 280 2
10 260 2
.......
180 450 4
181 90 1
182 120 1
183 440 4
184 210 2
185 330 3
186 210 2
187 100 1
188 0 0
I want to convert the area column values to factors, to do an anova. However, if
I use:
df$areaf <- factor(df$area,
labels=c("0","I","II","III","IV","V","VI","VII"))
it gives the following message:
Error in factor(df$area, labels = c("0", "I",
"II", "III", "IV", "V", "VI",
:
invalid labels; length 8 should be 1 or 7
Can anyone help?
Jabez
___________________________________________________________
now.
[[alternative HTML version deleted]]
Hi,
df
ht area
1 320 3
2 410 4
3 230 2
4 360 3
5 126 1
6 280 2
7 260 2
8 280 2
9 280 2
10 260 2
df$area <- as.factor(df$area)
levels(df$area) <- c("I", "II", "III",
"IV")
--
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O
On 10/08/07, Jabez Wilson <jabezwuk@yahoo.co.uk>
wrote:>
> Dear R Help,
> I have a set of data of heights of trees described by area that they are
> in. The areas are numerical (0 to 7).
>
> ht area
> 1 320 3
> 2 410 4
> 3 230 2
> 4 360 3
> 5 126 1
> 6 280 2
> 7 260 2
> 8 280 2
> 9 280 2
> 10 260 2
> .......
> 180 450 4
> 181 90 1
> 182 120 1
> 183 440 4
> 184 210 2
> 185 330 3
> 186 210 2
> 187 100 1
> 188 0 0
>
> I want to convert the area column values to factors, to do an anova.
> However, if I use:
>
> df$areaf <- factor(df$area,
>
labels=c("0","I","II","III","IV","V","VI","VII"))
>
> it gives the following message:
>
> Error in factor(df$area, labels = c("0", "I",
"II", "III", "IV", "V",
> "VI", :
> invalid labels; length 8 should be 1 or 7
>
> Can anyone help?
>
> Jabez
>
>
> ___________________________________________________________
>
> now.
>
> [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help@stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
[[alternative HTML version deleted]]
Hi r-help-bounces at stat.math.ethz.ch napsal dne 10.08.2007 13:41:53:> Dear R Help, > I have a set of data of heights of trees described by area that they arein.> The areas are numerical (0 to 7). > > ht area > 1 320 3 > 2 410 4 > 3 230 2 > 4 360 3 > 5 126 1 > 6 280 2 > 7 260 2 > 8 280 2 > 9 280 2 > 10 260 2 > ....... > 180 450 4 > 181 90 1 > 182 120 1 > 183 440 4 > 184 210 2 > 185 330 3 > 186 210 2 > 187 100 1 > 188 0 0 > > I want to convert the area column values to factors, to do an anova.However, if I use:> > df$areaf <- factor(df$area,labels=c("0","I","II","III","IV","V","VI","VII"))> > it gives the following message: >Hm, maybe some of the values are missing> num<-sample(1:3, 10, replace=T) > num[1] 1 3 1 2 3 3 1 3 3 3> factor(num, labels=c("O", "I", "II"))[1] O II O I II II O II II II Levels: O I II> factor(num, labels=c("O", "I", "II", "III"))Error in factor(num, labels = c("O", "I", "II", "III")) : invalid labels; length 4 should be 1 or 3>try table(df$area) to see what level you really have Regards Petr> Error in factor(df$area, labels = c("0", "I", "II", "III", "IV", "V","VI", :> invalid labels; length 8 should be 1 or 7 > > Can anyone help? > > Jabez > > > ___________________________________________________________ > > now. > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help at stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guidehttp://www.R-project.org/posting-guide.html> and provide commented, minimal, self-contained, reproducible code.
I am afraid the above example will not work. In original dataset of
Jabez Wilson numerical range is from 0..7.
So try this one:
df<-as.factor(c("0","I","II","III","IV","V","VI","VII")[df$area+1])
Hope this is what you want,
Rainer
Henrique Dallazuanna schrieb:> Hi,
>
> df
> ht area
> 1 320 3
> 2 410 4
> 3 230 2
> 4 360 3
> 5 126 1
> 6 280 2
> 7 260 2
> 8 280 2
> 9 280 2
> 10 260 2
>
> df$area <- as.factor(df$area)
> levels(df$area) <- c("I", "II", "III",
"IV")
>
>
> On 10/08/07, Jabez Wilson <jabezwuk at yahoo.co.uk> wrote:
>> Dear R Help,
>> I have a set of data of heights of trees described by area that they
>> are in. The areas are numerical (0 to 7).
>>
>> ht area
>> 1 320 3
>> 2 410 4
>> 3 230 2
>> 4 360 3
>> 5 126 1
>> 6 280 2
>> 7 260 2
>> 8 280 2
>> 9 280 2
>> 10 260 2
>> .......
>> 180 450 4
>> 181 90 1
>> 182 120 1
>> 183 440 4
>> 184 210 2
>> 185 330 3
>> 186 210 2
>> 187 100 1
>> 188 0 0
>>
>> I want to convert the area column values to factors, to do an anova.
>> However, if I use:
>>
>> df$areaf <- factor(df$area,
>>
labels=c("0","I","II","III","IV","V","VI","VII"))
>>
>> it gives the following message:
>>
>> Error in factor(df$area, labels = c("0", "I",
"II", "III", "IV", "V",
>> "VI", :
>> invalid labels; length 8 should be 1 or 7
>>
>> Can anyone help?
>>
>> Jabez