R help - May 2012 - PROBLEMS with In `[<-.factor`(`*tmp*`, (¿ORDERED FACTOR?)

HI!!!

I have a table containing qualitative and quantitative data; one of the
columns contains  "Level of education", and the possibilities are
"none",
"High school", "college"; I want to give the value 0 to
"none", the value 1
to "High school", and 2 to "college", but I got the
following error:

In `[<-.factor`(`*tmp*`, educa = "college", value = 2) :
  invalid factor level, NAs generated


WHAT IS WRONG????? :S :S :S 


THANKS A LOT!!!!!!!!!!!!!!

--
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Read this:
http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example

Read the posting guide:  http://www.R-project.org/posting-guide.html

and try again.

It's entirely impossible to help you as is.

Michael

On Tue, May 29, 2012 at 2:01 PM, RBB <raulbajob at gmail.com>
wrote:
> HI!!!
>
> I have a table containing qualitative and quantitative data; one of the
> columns contains ?"Level of education", and the possibilities are
"none",
> "High school", "college"; I want to give the value 0 to
"none", the value 1
> to "High school", and 2 to "college", but I got the
following error:
>
> In `[<-.factor`(`*tmp*`, educa = "college", value = 2) :
> ?invalid factor level, NAs generated
>
>
> WHAT IS WRONG????? :S :S :S
>
>
> THANKS A LOT!!!!!!!!!!!!!!
>
> --
> View this message in context:
http://r.789695.n4.nabble.com/PROBLEMS-with-In-factor-tmp-ORDERED-FACTOR-tp4631736.html
> Sent from the R help mailing list archive at Nabble.com.
>
> ______________________________________________
> R-help at r-project.org 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.

On May 29, 2012, at 11:01 AM, RBB wrote:
> HI!!!
>
> I have a table containing qualitative and quantitative data; one of  
> the
> columns contains  "Level of education", and the possibilities are
> "none",
> "High school", "college"; I want to give the value 0 to
"none", the
> value 1
> to "High school", and 2 to "college", but I got the
following error:
>
> In `[<-.factor`(`*tmp*`, educa = "college", value = 2) :
>  invalid factor level, NAs generated
>
>
> WHAT IS WRONG????? :S :S :S
>
Hard to say. Although we can be fairly sure you have a factor and that  
your do NOT have an R contingency table. If you really had a table it  
would be one thing. A dataframe is another thing and one that is much  
more common.

dfrm <- data.frame(lev=factor(c("none", "high",
"low", "high", "low")))
 > dfrm
    lev
1 none
2 high
3  low
4 high
5  low

 > levels(dfrm$lev)<- 2:0
 > dfrm
   lev
1   0
2   2
3   1
4   2
5   1

Notice that a factor variable's levels are ordered alphabetically, so  
"high" < "low" < "none" and if you wnat the
numbers to match up you
need to mentally figure out the right order to make  the matching work  
properly.

(It would be better practice not to overwrite the levels of an  
existing factor, since that action makes it very easy to really hash  
up the data.
-- 
David.
>
> THANKS A LOT!!!!!!!!!!!!!!
>
> --
> View this message in context:
http://r.789695.n4.nabble.com/PROBLEMS-with-In-factor-tmp-ORDERED-FACTOR-tp4631736.html
> Sent from the R help mailing list archive at Nabble.com.
>
> ______________________________________________
> R-help at r-project.org 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.

HI,

Do you want to replace the column ("level of education") with values
or just add values as second column?? I guess you are looking for the latter.


Try this,

dat<-data.frame(Levelofeducation=rep(c("none","HighSchool","College"),c(3,3,3)),value=rep(c(0,1,2),c(3,3,3)))
str(dat)

data.frame':??? 9 obs. of? 2 variables:
?$ Levelofeducation: Factor w/ 3 levels
"College","HighSchool",..: 3 3 3 2 2 2 1 1 1
?$ value?????????? : num? 0 0 0 1 1 1 2 2 2
> dat
? Levelofeducation value
1???????????? none???? 0
2???????????? none???? 0
3???????????? none???? 0
4?????? HighSchool???? 1
5?????? HighSchool???? 1
6?????? HighSchool???? 1
7????????? College???? 2
8????????? College???? 2
9????????? College???? 2

A.K.





----- Original Message -----
From: RBB <raulbajob at gmail.com>
To: r-help at r-project.org
Cc: 
Sent: Tuesday, May 29, 2012 2:01 PM
Subject: [R] PROBLEMS with In `[<-.factor`(`*tmp*`, (?ORDERED FACTOR?)

HI!!!

I have a table containing qualitative and quantitative data; one of the
columns contains? "Level of education", and the possibilities are
"none",
"High school", "college"; I want to give the value 0 to
"none", the value 1
to "High school", and 2 to "college", but I got the
following error:

In `[<-.factor`(`*tmp*`, educa = "college", value = 2) :
? invalid factor level, NAs generated


WHAT IS WRONG????? :S :S :S 


THANKS A LOT!!!!!!!!!!!!!!

--
View this message in context:
http://r.789695.n4.nabble.com/PROBLEMS-with-In-factor-tmp-ORDERED-FACTOR-tp4631736.html
Sent from the R help mailing list archive at Nabble.com.

______________________________________________
R-help at r-project.org 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.