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. 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data <- within(data,variable3=pmax(variable1,variable2)) also should work if your variables are numeric. using dplyr and magrittr (which I recommend to all my students) it could be library(dplyr) library(magrittr) data %<>% mutate(variable3=pmax(variable1,variable2))> On 26 Oct 2015, at 12:53, PIKAL Petr <petr.pikal at precheza.cz> wrote: > > Hi > >> -----Original Message----- >> From: R-help [mailto:r-help-bounces at r-project.org <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 <mailto: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. > ______________________________________________ > R-help at r-project.org <mailto:R-help at r-project.org> mailing list -- To UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help <https://stat.ethz.ch/mailman/listinfo/r-help> > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html <http://www.r-project.org/posting-guide.html> > and provide commented, minimal, self-contained, reproducible code.-------------- next part -------------- A non-text attachment was scrubbed... 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pmax() should work even without the fancy stuff. However, as Petr pointed out, so should the ifelse construct, unless there is more to the issue than we have been told. So I think Jennifer needs to elaborate on the "didn't work" aspect... -pd On 26 Oct 2015, at 13:02 , Erich Neuwirth <erich.neuwirth at univie.ac.at> wrote:> data <- within(data,variable3=pmax(variable1,variable2)) > also should work if your variables are numeric. > > using dplyr and magrittr (which I recommend to all my students) > it could be > > library(dplyr) > library(magrittr) > data %<>% mutate(variable3=pmax(variable1,variable2)) > > > >> On 26 Oct 2015, at 12:53, PIKAL Petr <petr.pikal at precheza.cz> wrote: >> >> Hi >> >>> -----Original Message----- >>> From: R-help [mailto:r-help-bounces at r-project.org <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 <mailto: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. >> ______________________________________________ >> R-help at r-project.org <mailto:R-help at r-project.org> mailing list -- To UNSUBSCRIBE and more, see >> https://stat.ethz.ch/mailman/listinfo/r-help <https://stat.ethz.ch/mailman/listinfo/r-help> >> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html <http://www.r-project.org/posting-guide.html> >> and provide commented, minimal, self-contained, reproducible code. > > ______________________________________________ > 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.-- Peter Dalgaard, Professor, Center for Statistics, Copenhagen Business School Solbjerg Plads 3, 2000 Frederiksberg, Denmark Phone: (+45)38153501 Office: A 4.23 Email: pd.mes at cbs.dk Priv: PDalgd at gmail.com