Hi
> -----Original Message-----
> From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of Duncan
> Murdoch
> Sent: Monday, October 26, 2015 11:58 AM
> To: Lorenz, Jennifer; r-help at r-project.org
> Subject: Re: [R] Creating new variables in R
>
> On 26/10/2015 6:24 AM, Lorenz, Jennifer wrote:
> > Hi,
> >
> > I have a question regarding the creation of new variables on the
> basis of existing ones in R.
> >
> > I have two variables containing information on parents'
educational
> degree (e.g. 1 'high school degree', 2 'college degree',
etc.). I would
> like to create a new variable for 'parents' highest educational
> degree', i.e. if variable1 (father's degree) is higher than
variable2
> (mother's degree) than the new variable (variable3) should take on the
> value of variable1, if not, than variable3 should take on the value of
> variable2.
> >
> > I usually use SPSS for data manipulation, there I would code
> variable3 as follows:
> > COMPUTE variable3= 0.
> > IF variable1 > variable2 variable3= variable1.
> > IF variable1 <= variable2 variable3= variable2.
> >
> > The closest I came to that in R was with this code:
> > data$variable3 <- 0
> > data$variable3[data$variable1 > data$variable2]<-data$variable1
> > data$variable3[data$variable1 <= data$variable2]<-data$variable2
> >
> > I also tried:
> > data$variable3 <- ifelse(data$variable1 > data$variable2),
> > data$variable1, data$variable2)
> >
> > Both didn't work.
The ifelse version should work. Are you sure that variable 1 and 2 are numeric?.
What is a result of str(data)?
Cheers
Petr
> >
> > I am not sure if my post is at all understandable (this is my first
> time posting on R-help), but I am really hoping for some advice!
>
> This is a good place to use the ifelse() function:
>
> data$variable3 <- ifelse(data$variable1 > data$variable2,
> data$variable1, data$variable2)
>
> Duncan Murdoch
>
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> 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.
________________________________
Tento e-mail a jak?koliv k n?mu p?ipojen? dokumenty jsou d?v?rn? a jsou ur?eny
pouze jeho adres?t?m.
Jestli?e jste obdr?el(a) tento e-mail omylem, informujte laskav? neprodlen? jeho
odes?latele. Obsah tohoto emailu i s p??lohami a jeho kopie vyma?te ze sv?ho
syst?mu.
Nejste-li zam??len?m adres?tem tohoto emailu, nejste opr?vn?ni tento email
jakkoliv u??vat, roz?i?ovat, kop?rovat ?i zve?ej?ovat.
Odes?latel e-mailu neodpov?d? za eventu?ln? ?kodu zp?sobenou modifikacemi ?i
zpo?d?n?m p?enosu e-mailu.
V p??pad?, ?e je tento e-mail sou??st? obchodn?ho jedn?n?:
- vyhrazuje si odes?latel pr?vo ukon?it kdykoliv jedn?n? o uzav?en? smlouvy, a
to z jak?hokoliv d?vodu i bez uveden? d?vodu.
- a obsahuje-li nab?dku, je adres?t opr?vn?n nab?dku bezodkladn? p?ijmout;
Odes?latel tohoto e-mailu (nab?dky) vylu?uje p?ijet? nab?dky ze strany p??jemce
s dodatkem ?i odchylkou.
- trv? odes?latel na tom, ?e p??slu?n? smlouva je uzav?ena teprve v?slovn?m
dosa?en?m shody na v?ech jej?ch n?le?itostech.
- odes?latel tohoto emailu informuje, ?e nen? opr?vn?n uzav?rat za spole?nost
??dn? smlouvy s v?jimkou p??pad?, kdy k tomu byl p?semn? zmocn?n nebo p?semn?
pov??en a takov? pov??en? nebo pln? moc byly adres?tovi tohoto emailu p??padn?
osob?, kterou adres?t zastupuje, p?edlo?eny nebo jejich existence je adres?tovi
?i osob? j?m zastoupen? zn?m?.
This e-mail and any documents attached to it may be confidential and are
intended only for its intended recipients.
If you received this e-mail by mistake, please immediately inform its sender.
Delete the contents of this e-mail with all attachments and its copies from your
system.
If you are not the intended recipient of this e-mail, you are not authorized to
use, disseminate, copy or disclose this e-mail in any manner.
The sender of this e-mail shall not be liable for any possible damage caused by
modifications of the e-mail or by delay with transfer of the email.
In case that this e-mail forms part of business dealings:
- the sender reserves the right to end negotiations about entering into a
contract in any time, for any reason, and without stating any reasoning.
- if the e-mail contains an offer, the recipient is entitled to immediately
accept such offer; The sender of this e-mail (offer) excludes any acceptance of
the offer on the part of the recipient containing any amendment or variation.
- the sender insists on that the respective contract is concluded only upon an
express mutual agreement on all its aspects.
- the sender of this e-mail informs that he/she is not authorized to enter into
any contracts on behalf of the company except for cases in which he/she is
expressly authorized to do so in writing, and such authorization or power of
attorney is submitted to the recipient or the person represented by the
recipient, or the existence of such authorization is known to the recipient of
the person represented by the recipient.