Hi Thanks for example.
see in line > -----Original Message----- > From: g.maub...@weinwolf.de [mailto:g.maub...@weinwolf.de] > Sent: Wednesday, June 8, 2016 3:56 PM > To: PIKAL Petr <petr.pi...@precheza.cz> > Cc: r-help@r-project.org > Subject: Antwort: RE: [R] Antwort: Re: Merging variables > > Hi Petr, > > thanks for your reply. > > I prepared little example for you: > > -- cut -- > > ds_temp_1 <- > structure(list( > CustId = c(1001, 1002, 1003, 1004, 1005, 1006), > CustName = c("Miller", "Smith", "Doe", "White", "Black", > "Nobody"), > sales = c(100, 500, 300, 50, 700, 10) > ), > .Names = c("CustId", > "CustName", "sales"), row.names = c(NA, 6L), class = > "data.frame") > > ds_temp_2 <- > structure( > list( > CustId = c(1001, 1002, 1003), > CustName = c("Miller", > "Smith", "Doe"), > CustGroup = c(1, 2, 3) > ), > .Names = c("CustId", > "CustName", "CustGroup"), > row.names = c(NA, 3L), > class = "data.frame" > ) > > ds_merge <- merge(ds_temp_1, ds_temp_2, > by.x = "CustId", all.x = TRUE, > by.y = "CustId", all.y = FALSE) > > ds_merge > > -- cut -- > > which gives > > ds_merge > CustId CustName.x sales CustName.y CustGroup > 1 1001 Miller 100 Miller 1 > 2 1002 Smith 500 Smith 2 > 3 1003 Doe 300 Doe 3 > 4 1004 White 50 <NA> NA > 5 1005 Black 700 <NA> NA > 6 1006 Nobody 10 <NA> NA > > where CustName is split into CustName.x and CustName.y. > > What I would like to have is: > > ds_merge > CustId CustName sales CustGroup > 1 1001 Miller 100 1 > 2 1002 Smith 500 2 > 3 1003 Doe 300 3 > 4 1004 White 50 NA > 5 1005 Black 700 NA > 6 1006 Nobody 10 NA > > That is CustName in a single variable cause the values within that variable > are > identical. I guess because of NA for some cases in ds_temp_2 R generates > CustName.x and CustName.y. Do not guess, try or read help page. The behavior is due to fact that ***you** restricted merge only on cust id and resulting data frame cannot have columns with the same names. ds_merge <- merge(ds_temp_1, ds_temp_2, all.x = TRUE, all.y = FALSE) Regards Petr > > Is there a simple way of merging a dataset and having R return a single > variable is the values are identical or missing in either one of the datasets? > > Kind regards > > Georg > > > > > > Von: PIKAL Petr <petr.pi...@precheza.cz> > An: "g.maub...@weinwolf.de" <g.maub...@weinwolf.de>, > Kopie: "r-help@r-project.org" <r-help@r-project.org> > Datum: 07.06.2016 13:11 > Betreff: RE: [R] Antwort: Re: Merging variables > > > > Hi > > > -----Original Message----- > > From: R-help [mailto:r-help-boun...@r-project.org] On Behalf Of > > g.maub...@weinwolf.de > > Sent: Tuesday, June 7, 2016 8:19 AM > > To: Michael Dewey <li...@dewey.myzen.co.uk> > > Cc: r-help@r-project.org > > Subject: [R] Antwort: Re: Merging variables > > > > Hi Michael, > > > > yes, I was astonished about this behaviour either. I have worked with > SPSS a > > lot - and that works different. > > If you want to join two data frames by common names you can use use > > merge(dat1, dat2, ....) > > without specifing by. From help page: > > By default the data frames are merged on the columns with names they both > have, but separate specifications of the columns can be given by by.x and > by.y. The rows in the two data frames that match on the specified columns > are extracted, and joined together. > > > > > I would like to share some of my data. Can you tell me how I can dump > > a dataset in a way that I can post it here as text? > > copy result of dput directly to your mail > > dput(dat) > structure(list(hz = c(0, 25, 50), vykon = c(0, 11.6, 22.6)), .Names = c("hz", > "vykon"), row.names = c(NA, -3L), class = "data.frame") > > We can use > > dat <- structure(list(hz = c(0, 25, 50), vykon = c(0, 11.6, 22.6)), .Names = > c("hz", "vykon"), row.names = c(NA, -3L), class = "data.frame") > > to reconstruct the object. > > Regards > Petr > > > > > Kind regards > > > > Georg > > > > > > > > > > Von: Michael Dewey <li...@dewey.myzen.co.uk> > > An: g.maub...@weinwolf.de, r-help@r-project.org, > > Datum: 06.06.2016 15:45 > > Betreff: Re: [R] Merging variables > > > > > > > > X-Originating-<%= hostname %>-IP: [217.155.205.190] > > > > Dear Georg > > > > I find it a bit surprising that you end up with customer.x and > customer.y. Can > > you share with us a toy example of two data.frames which exhibit this > > behaviour? > > > > On 06/06/2016 13:29, g.maub...@weinwolf.de wrote: > > > Hi All, > > > > > > I merged two datasets: > > > > > > ds_merge1 <- merge(x = ds_bw_customer_4_match, y = > > > ds_zww_customer_4_match, > > > by.x = "customer", by.y = "customer", > > > all.x = TRUE, all.y = FALSE) > > > > > > R created a new dataset with the variables customer.x and customer.y. > > > I would like to merge these two variable back together. I wrote a > > > little function (code can be run) for it: > > > > > > -- cut -- > > > > > > customer.x <- c("Miller", "Smith", NA, "Bird", NA) > > > customer.y <- c("Miller", NA, "Doe", "Fish", NA) > > > ds_test <- data.frame(customer.x, customer.y, stringsAsFactors = > > > FALSE) > > > > > > t_merge_variables <- > > > function(dataset, > > > var1, > > > var2, > > > merged_var) { > > > > > > # Initialize > > > dataset[[merged_var]] = rep(NA, nrow(dataset)) > > > dataset[["mismatch"]] = rep(NA, nrow(dataset)) > > > > > > for (i in 1:nrow(dataset)) { > > > > > > # Check 1: var1 missing, var2 missing > > > if (is.na(dataset[[i, var1]]) & > > > is.na(dataset[[i, var2]])) { > > > dataset[["mismatch"]] <- 1 # var1 & var2 are missing > > > > > > # Check 2: var1 filled, var2 missing > > > } else if (!is.na(dataset[[i, var1]]) & > > > is.na(dataset[[i, var2]])) { > > > dataset[[i, merged_var]] <- dataset[[i, var1]] > > > dataset[["mismatch"]] <- 0 > > > > > > # Check 3: var1 missing, var2 filled > > > } else if (is.na(dataset[[i, var1]]) & > > > !is.na(dataset[i, var2])) { > > > dataset[[i, merged_var]] <- dataset[[i, var2]] > > > dataset[["mismatch"]] <- 0 > > > > > > # Check 4: var1 == var2 > > > } else if (dataset[[i, var1]] == dataset[[i, var2]]) { > > > dataset[[i, merged_var]] <- dataset[[i, var1]] > > > dataset[["mismatch"]] <- 0 > > > > > > # Leftover: var1 != var2 > > > } else { > > > dataset[[i, merged_var]] <- NA > > > dataset[["mismatch"]] <- 2 # var1 != var2 > > > } # end if > > > } # end for > > > return(dataset) > > > } > > > > > > ds_var_merge1 <- t_merge_variables(dataset = ds_test, > > > var1 = "customer.x", > > > var2 = "customer.y", > > > merged_var = "customer") > > > > > > ds_var_merge1 > > > > > > -- cut -- > > > > > > It is executed without error but delivers the wrong values in the > > variable > > > "mismatch". This variable is always 1 although it should be NA, 1 or > > > 2 respectively. > > > > > > Can you tell me why the variable is not correctly set? > > > > > > Kind regards > > > > > > Georg > > > > > > ______________________________________________ > > > R-help@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. > > > > > > > -- > > Michael > > http://www.dewey.myzen.co.uk/home.html > > > > ______________________________________________ > > R-help@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 jakékoliv k němu připojené dokumenty jsou důvěrné a jsou > určeny pouze jeho adresátům. > Jestliže jste obdržel(a) tento e-mail omylem, informujte laskavě neprodleně > jeho odesílatele. Obsah tohoto emailu i s přílohami a jeho kopie vymažte ze > svého systému. > Nejste-li zamýšleným adresátem tohoto emailu, nejste oprávněni tento > email jakkoliv užívat, rozšiřovat, kopírovat či zveřejňovat. > Odesílatel e-mailu neodpovídá za eventuální škodu způsobenou > modifikacemi či zpožděním přenosu e-mailu. > > V případě, že je tento e-mail součástí obchodního jednání: > - vyhrazuje si odesílatel právo ukončit kdykoliv jednání o uzavření smlouvy, a > to z jakéhokoliv důvodu i bez uvedení důvodu. > - a obsahuje-li nabídku, je adresát oprávněn nabídku bezodkladně přijmout; > Odesílatel tohoto e-mailu (nabídky) vylučuje přijetí nabídky ze strany > příjemce s dodatkem či odchylkou. > - trvá odesílatel na tom, že příslušná smlouva je uzavřena teprve výslovným > dosažením shody na všech jejích náležitostech. > - odesílatel tohoto emailu informuje, že není oprávněn uzavírat za společnost > žádné smlouvy s výjimkou případů, kdy k tomu byl písemně zmocněn nebo > písemně pověřen a takové pověření nebo plná moc byly adresátovi tohoto > emailu případně osobě, kterou adresát zastupuje, předloženy nebo jejich > existence je adresátovi či osobě jím zastoupené známá. > > 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. > ________________________________ Tento e-mail a jakékoliv k němu připojené dokumenty jsou důvěrné a jsou určeny pouze jeho adresátům. Jestliže jste obdržel(a) tento e-mail omylem, informujte laskavě neprodleně jeho odesílatele. Obsah tohoto emailu i s přílohami a jeho kopie vymažte ze svého systému. Nejste-li zamýšleným adresátem tohoto emailu, nejste oprávněni tento email jakkoliv užívat, rozšiřovat, kopírovat či zveřejňovat. Odesílatel e-mailu neodpovídá za eventuální škodu způsobenou modifikacemi či zpožděním přenosu e-mailu. V případě, že je tento e-mail součástí obchodního jednání: - vyhrazuje si odesílatel právo ukončit kdykoliv jednání o uzavření smlouvy, a to z jakéhokoliv důvodu i bez uvedení důvodu. - a obsahuje-li nabídku, je adresát oprávněn nabídku bezodkladně přijmout; Odesílatel tohoto e-mailu (nabídky) vylučuje přijetí nabídky ze strany příjemce s dodatkem či odchylkou. - trvá odesílatel na tom, že příslušná smlouva je uzavřena teprve výslovným dosažením shody na všech jejích náležitostech. - odesílatel tohoto emailu informuje, že není oprávněn uzavírat za společnost žádné smlouvy s výjimkou případů, kdy k tomu byl písemně zmocněn nebo písemně pověřen a takové pověření nebo plná moc byly adresátovi tohoto emailu případně osobě, kterou adresát zastupuje, předloženy nebo jejich existence je adresátovi či osobě jím zastoupené známá. 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@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.
