How can I manipulate values of only certain entries in a vector, based on what the existing values are? So for instance if I want to add one to each of the following values, or multiply them by a specific factor: agents[which(agent$membership == 1)] how would I do this please? If there was just one value to manipulate I'd just do this: value <- value + 1 and this would let me set the values: agents[which(agent$membership == 1)] <- 100 but how to essentially achieve this: agents[which(agent$membership == 1)] <- agents[which(agent$membership == 1)] + 1 Thank you! This message and any attachment are intended solely for the addressee and may contain confidential information. If you have received this message in error, please send it back to me, and immediately delete it. Please do not use, copy or disclose the information contained in this message or in any attachment. Any views or opinions expressed by the author of this email do not necessarily reflect the views of the University of Nottingham. This message has been checked for viruses but the contents of an attachment may still contain software viruses which could damage your computer system, you are advised to perform your own checks. Email communications with the University of Nottingham may be monitored as permitted by UK legislation.
Hi Are agents and agent different objects? Or it is a typo? Better would be to provide some real or fake data by dput or at least result of str(agent) and str(agents) Actually your code shall work in case agent and agents have same length and expected order. agents[which(agent$membership == 1)] <- agents[which(agent$membership == 1)] + 1 For less typing you can do: sel <- which(agent$membership == 1) agents[sel] <- agents[sel] + 1 The code can be different if agent or agents are objects like matrix or array. Actually from the code xxx$yyy I presume it is data frame or list. Cheers Petr> -----Original Message----- > From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of Thomas > Chesney > Sent: Thursday, October 01, 2015 12:04 PM > To: r-help at r-project.org > Subject: [R] Increment certain values in a vector > > How can I manipulate values of only certain entries in a vector, based > on what the existing values are? > > So for instance if I want to add one to each of the following values, > or multiply them by a specific factor: > > agents[which(agent$membership == 1)] > > how would I do this please? > > If there was just one value to manipulate I'd just do this: > > value <- value + 1 > > and this would let me set the values: > > agents[which(agent$membership == 1)] <- 100 > > but how to essentially achieve this: > > agents[which(agent$membership == 1)] <- agents[which(agent$membership > == 1)] + 1 > > Thank you! > > > > This message and any attachment are intended solely for the addressee > and may contain confidential information. If you have received this > message in error, please send it back to me, and immediately delete it. > > Please do not use, copy or disclose the information contained in this > message or in any attachment. Any views or opinions expressed by the > author of this email do not necessarily reflect the views of the > University of Nottingham. > > This message has been checked for viruses but the contents of an > attachment may still contain software viruses which could damage your > computer system, you are advised to perform your own checks. Email > communications with the University of Nottingham may be monitored as > permitted by UK legislation. > > ______________________________________________ > 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. 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Hi, On Thursday, October 1, 2015, Thomas Chesney < Thomas.Chesney at nottingham.ac.uk> wrote:> How can I manipulate values of only certain entries in a vector, based on > what the existing values are? > > So for instance if I want to add one to each of the following values, or > multiply them by a specific factor: > > agents[which(agent$membership == 1)] > > how would I do this please? > > If there was just one value to manipulate I'd just do this: > > value <- value + 1 > > and this would let me set the values: > > agents[which(agent$membership == 1)] <- 100 > > but how to essentially achieve this: > > agents[which(agent$membership == 1)] <- agents[which(agent$membership => 1)] + 1Did you try that? I'd do it without the which() because I'm lazy, but it should work. -- Sarah Goslee http://www.stringpage.com http://www.sarahgoslee.com http://www.functionaldiversity.org [[alternative HTML version deleted]]
Hi Sarah> -----Original Message----- > From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of Sarah > Goslee > Sent: Thursday, October 01, 2015 1:01 PM > To: Thomas Chesney > Cc: r-help at r-project.org > Subject: Re: [R] Increment certain values in a vector > > Hi, > > On Thursday, October 1, 2015, Thomas Chesney < > Thomas.Chesney at nottingham.ac.uk> wrote: > > > How can I manipulate values of only certain entries in a vector, > based > > on what the existing values are? > > > > So for instance if I want to add one to each of the following values, > > or multiply them by a specific factor: > > > > agents[which(agent$membership == 1)] > > > > how would I do this please? > > > > If there was just one value to manipulate I'd just do this: > > > > value <- value + 1 > > > > and this would let me set the values: > > > > agents[which(agent$membership == 1)] <- 100 > > > > but how to essentially achieve this: > > > > agents[which(agent$membership == 1)] <- agents[which(agent$membership > > == 1)] + 1 > > > Did you try that? I'd do it without the which() because I'm lazy, but > it should work.But only if you do not have vector with NA values.> x<-1:10 > x[c(4,6)]<-NA > x>5[1] FALSE FALSE FALSE NA FALSE NA TRUE TRUE TRUE TRUE> x[x>5]<-x[x>5]+10Error in x[x > 5] <- x[x > 5] + 10 : NAs are not allowed in subscripted assignments> x[which(x>5)]<-x[which(x>5)]+10 > x[1] 1 2 3 NA 5 NA 17 18 19 20 Cheers Petr> > > > > -- > Sarah Goslee > http://www.stringpage.com > http://www.sarahgoslee.com > http://www.functionaldiversity.org > > [[alternative HTML version deleted]] > > ______________________________________________ > 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.
I got it sorted thank you. As you point out, the original code works fine (there was a type mismatch with it). On 1 Oct 2015, at 12:00, PIKAL Petr <petr.pikal at precheza.cz> wrote: Hi Are agents and agent different objects? Or it is a typo? Better would be to provide some real or fake data by dput or at least result of str(agent) and str(agents) Actually your code shall work in case agent and agents have same length and expected order. agents[which(agent$membership == 1)] <- agents[which(agent$membership == 1)] + 1 For less typing you can do: sel <- which(agent$membership == 1) agents[sel] <- agents[sel] + 1 The code can be different if agent or agents are objects like matrix or array. Actually from the code xxx$yyy I presume it is data frame or list. Cheers Petr> -----Original Message----- > From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of Thomas > Chesney > Sent: Thursday, October 01, 2015 12:04 PM > To: r-help at r-project.org > Subject: [R] Increment certain values in a vector > > How can I manipulate values of only certain entries in a vector, based > on what the existing values are? > > So for instance if I want to add one to each of the following values, > or multiply them by a specific factor: > > agents[which(agent$membership == 1)] > > how would I do this please? > > If there was just one value to manipulate I'd just do this: > > value <- value + 1 > > and this would let me set the values: > > agents[which(agent$membership == 1)] <- 100 > > but how to essentially achieve this: > > agents[which(agent$membership == 1)] <- agents[which(agent$membership > == 1)] + 1 > > Thank you! > > > > This message and any attachment are intended solely for the addressee > and may contain confidential information. If you have received this > message in error, please send it back to me, and immediately delete it. > > Please do not use, copy or disclose the information contained in this > message or in any attachment. Any views or opinions expressed by the > author of this email do not necessarily reflect the views of the > University of Nottingham. > > This message has been checked for viruses but the contents of an > attachment may still contain software viruses which could damage your > computer system, you are advised to perform your own checks. Email > communications with the University of Nottingham may be monitored as > permitted by UK legislation. > > ______________________________________________ > 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. This message and any attachment are intended solely for the addressee and may contain confidential information. If you have received this message in error, please send it back to me, and immediately delete it. Please do not use, copy or disclose the information contained in this message or in any attachment. Any views or opinions expressed by the author of this email do not necessarily reflect the views of the University of Nottingham. This message has been checked for viruses but the contents of an attachment may still contain software viruses which could damage your computer system, you are advised to perform your own checks. Email communications with the University of Nottingham may be monitored as permitted by UK legislation.