[R] Need a factor level even though there are no observations
I'm in this situation:
factorlabels - c(School, College, Beyond)
with data for 8 families:
education.man - c(1,2,1,2,1,2,1,2) # Note : no 3 values
education.wife - c(1,2,3,1,2,3,1,2) # 1,2,3 are all present.
My goal is to create this table:
School College Beyond
Husband 4 40
Wife 3 32
How do I do this?
I can readily do:
education.wife - factor(education.wife, labels=factorlabels)
But this breaks:
education.man - factor(education.man, labels=factorlabels)
because none of the families have a husband who went beyond college.
I get around this problem in a limited way by:
cautiously - function(x, labels) {
factor(x, labels=factorlabels[as.numeric(levels(factor(x)))])
}
education.man - cautiously(education.man, labels=factorlabels)
Now I get:
table(education.man)
School College
4 4
table(education.wife)
School College Beyond
3 3 2
This is a pain because now the two tables are not conformable. How do
I get to my end goal, which is the table:
School College Beyond
Husband 4 40
Wife 3 32
In other words, how do I force education.man to have a factor with 3
levels - School College Beyond - even though there is no
observation in Beyond.
--
Ajay Shah Consultant
[EMAIL PROTECTED] Department of Economic Affairs
http://www.mayin.org/ajayshah Ministry of Finance, New Delhi
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RE: [R] Need a factor level even though there are no observations
Hello,
Does this work?
m - as.factor(education.man)
levels(m)[1:3] - factorlabels
table(m)
Bruno
Bruno Falissard
INSERM U669, PSIGIAM
Paris Sud Innovation Group in Adolescent Mental Health
Maison de Solenn
97 Boulevard de Port Royal
75679 Paris cedex 14, France
tel : (+33) 6 81 82 70 76
fax : (+33) 1 45 59 34 18
web site : http://perso.wanadoo.fr/bruno.falissard/
-Message d'origine-
De : [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] De la part de Ajay Narottam Shah
Envoyé : dimanche 8 mai 2005 15:57
À : r-help
Objet : [R] Need a factor level even though there are no observations
I'm in this situation:
factorlabels - c(School, College, Beyond)
with data for 8 families:
education.man - c(1,2,1,2,1,2,1,2) # Note : no 3 values
education.wife - c(1,2,3,1,2,3,1,2) # 1,2,3 are all present.
My goal is to create this table:
School College Beyond
Husband 4 40
Wife 3 32
How do I do this?
I can readily do:
education.wife - factor(education.wife, labels=factorlabels)
But this breaks:
education.man - factor(education.man, labels=factorlabels)
because none of the families have a husband who went beyond college.
I get around this problem in a limited way by:
cautiously - function(x, labels) {
factor(x, labels=factorlabels[as.numeric(levels(factor(x)))])
}
education.man - cautiously(education.man, labels=factorlabels)
Now I get:
table(education.man)
School College
4 4
table(education.wife)
School College Beyond
3 3 2
This is a pain because now the two tables are not conformable. How do
I get to my end goal, which is the table:
School College Beyond
Husband 4 40
Wife 3 32
In other words, how do I force education.man to have a factor with 3
levels - School College Beyond - even though there is no
observation in Beyond.
--
Ajay Shah Consultant
[EMAIL PROTECTED] Department of Economic Affairs
http://www.mayin.org/ajayshah Ministry of Finance, New Delhi
__
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
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Re: [R] Need a factor level even though there are no observations
Set levels not labels in the factor call. E.g.
factor(School, levels = factorlabels)
On Sun, 8 May 2005, Ajay Narottam Shah wrote:
I'm in this situation:
factorlabels - c(School, College, Beyond)
with data for 8 families:
education.man - c(1,2,1,2,1,2,1,2) # Note : no 3 values
education.wife - c(1,2,3,1,2,3,1,2) # 1,2,3 are all present.
My goal is to create this table:
School College Beyond
Husband 4 40
Wife 3 32
How do I do this?
I can readily do:
education.wife - factor(education.wife, labels=factorlabels)
But this breaks:
education.man - factor(education.man, labels=factorlabels)
because none of the families have a husband who went beyond college.
I get around this problem in a limited way by:
cautiously - function(x, labels) {
factor(x, labels=factorlabels[as.numeric(levels(factor(x)))])
}
education.man - cautiously(education.man, labels=factorlabels)
Now I get:
table(education.man)
School College
4 4
table(education.wife)
School College Beyond
3 3 2
This is a pain because now the two tables are not conformable. How do
I get to my end goal, which is the table:
School College Beyond
Husband 4 40
Wife 3 32
In other words, how do I force education.man to have a factor with 3
levels - School College Beyond - even though there is no
observation in Beyond.
--
Ajay Shah Consultant
[EMAIL PROTECTED] Department of Economic Affairs
http://www.mayin.org/ajayshah Ministry of Finance, New Delhi
__
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
--
Brian D. Ripley, [EMAIL PROTECTED]
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UKFax: +44 1865 272595
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