Hi Thanks for working example. you could use split/ lapply approach, however it is probably not much better than dplyr method. sapply(split(mydf, mydf$type), function(speed, n_vehicles) sum(mydf$speed*mydf$n_vehicles)/sum(mydf$n_vehicles)) gives you averages aggregate(mydf$n_vehicles, list(mydf$type), sum)$x gives you sums Cheers Petr> -----Original Message----- > From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of Massimo > Bressan > Sent: Thursday, November 9, 2017 2:17 PM > To: r-help <r-help at r-project.org> > Subject: Re: [R] weighted average grouped by variables > > Hello > > an update about my question: I worked out the following solution (with the > package "dplyr") > > library(dplyr) > > mydf%>% > mutate(speed_vehicles=n_vehicles*mydf$speed) %>% > group_by(date_time,type) %>% > summarise( > sum_n_times_speed=sum(speed_vehicles), > n_vehicles=sum(n_vehicles), > vel=sum(speed_vehicles)/sum(n_vehicles) > ) > > > In fact I was hoping to manage everything in a "one-go": i.e. without the need > to create the "intermediate" variable called "speed_vehicles" and with the use > of the function weighted.mean() > > any hints for a different approach much appreciated > > thanks > > > > Da: "Massimo Bressan" <massimo.bressan at arpa.veneto.it> > A: "r-help" <r-help at r-project.org> > Inviato: Gioved?, 9 novembre 2017 12:20:52 > Oggetto: weighted average grouped by variables > > hi all > > I have this dataframe (created as a reproducible example) > > mydf<-structure(list(date_time = structure(c(1508238000, 1508238000, > 1508238000, 1508238000, 1508238000, 1508238000, 1508238000), class > c("POSIXct", "POSIXt"), tzone = ""), direction = structure(c(1L, 1L, 1L, 1L, 2L, 2L, > 2L), .Label = c("A", "B"), class = "factor"), type = structure(c(1L, 2L, 3L, 4L, 1L, > 2L, 3L), .Label = c("car", "light_duty", "heavy_duty", "motorcycle"), class > "factor"), avg_speed = c(41.1029082774049, 40.3333333333333, > 40.3157894736842, 36.0869565217391, 33.4065155807365, > 37.6222222222222, 35.5), n_vehicles = c(447L, 24L, 19L, 23L, 706L, 45L, 26L)), > .Names = c("date_time", "direction", "type", "speed", "n_vehicles"), row.names > = c(NA, -7L), class = "data.frame") > > mydf > > and I need to get to this final result > > mydf_final<-structure(list(date_time = structure(c(1508238000, 1508238000, > 1508238000, 1508238000), class = c("POSIXct", "POSIXt"), tzone = ""), type > structure(c(1L, 2L, 3L, 4L), .Label = c("car", "light_duty", "heavy_duty", > "motorcycle"), class = "factor"), weighted_avg_speed = c(36.39029, 38.56521, > 37.53333, 36.08696), n_vehicles = c(1153L,69L,45L,23L)), .Names > c("date_time", "type", "weighted_avg_speed", "n_vehicles"), row.names > c(NA, -4L), class = "data.frame") > > mydf_final > > > my question: > how to compute a weighted mean i.e. "weighted_avg_speed" > from "speed" (the values whose weighted mean is to be computed) and > "n_vehicles" (the weights) grouped by "date_time" and "type"? > > to be noted the complication of the case "motorcycle" (not present in both > directions) > > any help for that? > > thank you > > max > > > > -- > > ------------------------------------------------------------ > Massimo Bressan > > ARPAV > Agenzia Regionale per la Prevenzione e > Protezione Ambientale del Veneto > > Dipartimento Provinciale di Treviso > Via Santa Barbara, 5/a > 31100 Treviso, Italy > > tel: +39 0422 558545 > fax: +39 0422 558516 > e-mail: massimo.bressan at arpa.veneto.it > ------------------------------------------------------------ > > > [[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. 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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.
> On 9 Nov 2017, at 14:58, PIKAL Petr <petr.pikal at precheza.cz> wrote: > > Hi > > Thanks for working example. > > you could use split/ lapply approach, however it is probably not much better than dplyr method. > > sapply(split(mydf, mydf$type), function(speed, n_vehicles) sum(mydf$speed*mydf$n_vehicles)/sum(mydf$n_vehicles)) > gives you averages >The result of this calculation is: car light_duty heavy_duty motorcycle 36.54109 36.54109 36.54109 36.54109 But this doesn't give the same result as the dplyr method which is: date_time type vel <dttm> <fctr> <dbl> 1 2017-10-17 13:00:00 car 36.39029 2 2017-10-17 13:00:00 light_duty 38.56522 3 2017-10-17 13:00:00 heavy_duty 37.53333 4 2017-10-17 13:00:00 motorcycle 36.08696 The base R way of getting the result should be modified slightly into sapply(split(mydf, mydf$type), function(Z) sum(Z$speed*Z$n_vehicles)/sum(Z$n_vehicles)) Calculations are done on the elements of the list provided by split. The result now is: car light_duty heavy_duty motorcycle 36.39029 38.56522 37.53333 36.08696 Obviously now the same as the dplyr method. Berend Hasselman> aggregate(mydf$n_vehicles, list(mydf$type), sum)$x > gives you sums > > Cheers > Petr > >> -----Original Message----- >> From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of Massimo >> Bressan >> Sent: Thursday, November 9, 2017 2:17 PM >> To: r-help <r-help at r-project.org> >> Subject: Re: [R] weighted average grouped by variables >> >> Hello >> >> an update about my question: I worked out the following solution (with the >> package "dplyr") >> >> library(dplyr) >> >> mydf%>% >> mutate(speed_vehicles=n_vehicles*mydf$speed) %>% >> group_by(date_time,type) %>% >> summarise( >> sum_n_times_speed=sum(speed_vehicles), >> n_vehicles=sum(n_vehicles), >> vel=sum(speed_vehicles)/sum(n_vehicles) >> ) >> >> >> In fact I was hoping to manage everything in a "one-go": i.e. without the need >> to create the "intermediate" variable called "speed_vehicles" and with the use >> of the function weighted.mean() >> >> any hints for a different approach much appreciated >> >> thanks >> >> >> >> Da: "Massimo Bressan" <massimo.bressan at arpa.veneto.it> >> A: "r-help" <r-help at r-project.org> >> Inviato: Gioved?, 9 novembre 2017 12:20:52 >> Oggetto: weighted average grouped by variables >> >> hi all >> >> I have this dataframe (created as a reproducible example) >> >> mydf<-structure(list(date_time = structure(c(1508238000, 1508238000, >> 1508238000, 1508238000, 1508238000, 1508238000, 1508238000), class >> c("POSIXct", "POSIXt"), tzone = ""), direction = structure(c(1L, 1L, 1L, 1L, 2L, 2L, >> 2L), .Label = c("A", "B"), class = "factor"), type = structure(c(1L, 2L, 3L, 4L, 1L, >> 2L, 3L), .Label = c("car", "light_duty", "heavy_duty", "motorcycle"), class >> "factor"), avg_speed = c(41.1029082774049, 40.3333333333333, >> 40.3157894736842, 36.0869565217391, 33.4065155807365, >> 37.6222222222222, 35.5), n_vehicles = c(447L, 24L, 19L, 23L, 706L, 45L, 26L)), >> .Names = c("date_time", "direction", "type", "speed", "n_vehicles"), row.names >> = c(NA, -7L), class = "data.frame") >> >> mydf >> >> and I need to get to this final result >> >> mydf_final<-structure(list(date_time = structure(c(1508238000, 1508238000, >> 1508238000, 1508238000), class = c("POSIXct", "POSIXt"), tzone = ""), type >> structure(c(1L, 2L, 3L, 4L), .Label = c("car", "light_duty", "heavy_duty", >> "motorcycle"), class = "factor"), weighted_avg_speed = c(36.39029, 38.56521, >> 37.53333, 36.08696), n_vehicles = c(1153L,69L,45L,23L)), .Names >> c("date_time", "type", "weighted_avg_speed", "n_vehicles"), row.names >> c(NA, -4L), class = "data.frame") >> >> mydf_final >> >> >> my question: >> how to compute a weighted mean i.e. "weighted_avg_speed" >> from "speed" (the values whose weighted mean is to be computed) and >> "n_vehicles" (the weights) grouped by "date_time" and "type"? >> >> to be noted the complication of the case "motorcycle" (not present in both >> directions) >> >> any help for that? >> >> thank you >> >> max >> >> >> >> -- >> >> ------------------------------------------------------------ >> Massimo Bressan >> >> ARPAV >> Agenzia Regionale per la Prevenzione e >> Protezione Ambientale del Veneto >> >> Dipartimento Provinciale di Treviso >> Via Santa Barbara, 5/a >> 31100 Treviso, Italy >> >> tel: +39 0422 558545 >> fax: +39 0422 558516 >> e-mail: massimo.bressan at arpa.veneto.it >> ------------------------------------------------------------ >> >> >> [[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. > ______________________________________________ > 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.
Hi Berend Yes you are correct. My fault, I did not test it before sending. Cheers Petr> -----Original Message----- > From: Berend Hasselman [mailto:bhh at xs4all.nl] > Sent: Saturday, November 11, 2017 11:26 AM > To: PIKAL Petr <petr.pikal at precheza.cz> > Cc: Massimo Bressan <massimo.bressan at arpa.veneto.it>; r-help <r-help at r- > project.org> > Subject: Re: [R] weighted average grouped by variables > > > > On 9 Nov 2017, at 14:58, PIKAL Petr <petr.pikal at precheza.cz> wrote: > > > > Hi > > > > Thanks for working example. > > > > you could use split/ lapply approach, however it is probably not much better > than dplyr method. > > > > sapply(split(mydf, mydf$type), function(speed, n_vehicles) > > sum(mydf$speed*mydf$n_vehicles)/sum(mydf$n_vehicles)) > > gives you averages > > > > The result of this calculation is: > > car light_duty heavy_duty motorcycle > 36.54109 36.54109 36.54109 36.54109 > > But this doesn't give the same result as the dplyr method which is: > > date_time type vel > <dttm> <fctr> <dbl> > 1 2017-10-17 13:00:00 car 36.39029 > 2 2017-10-17 13:00:00 light_duty 38.56522 > 3 2017-10-17 13:00:00 heavy_duty 37.53333 > 4 2017-10-17 13:00:00 motorcycle 36.08696 > > The base R way of getting the result should be modified slightly into > > sapply(split(mydf, mydf$type), function(Z) > sum(Z$speed*Z$n_vehicles)/sum(Z$n_vehicles)) > > Calculations are done on the elements of the list provided by split. > The result now is: > > car light_duty heavy_duty motorcycle > 36.39029 38.56522 37.53333 36.08696 > > Obviously now the same as the dplyr method. > > Berend Hasselman > > > aggregate(mydf$n_vehicles, list(mydf$type), sum)$x gives you sums > > > > Cheers > > Petr > > > >> -----Original Message----- > >> From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of > >> Massimo Bressan > >> Sent: Thursday, November 9, 2017 2:17 PM > >> To: r-help <r-help at r-project.org> > >> Subject: Re: [R] weighted average grouped by variables > >> > >> Hello > >> > >> an update about my question: I worked out the following solution > >> (with the package "dplyr") > >> > >> library(dplyr) > >> > >> mydf%>% > >> mutate(speed_vehicles=n_vehicles*mydf$speed) %>% > >> group_by(date_time,type) %>% > >> summarise( > >> sum_n_times_speed=sum(speed_vehicles), > >> n_vehicles=sum(n_vehicles), > >> vel=sum(speed_vehicles)/sum(n_vehicles) > >> ) > >> > >> > >> In fact I was hoping to manage everything in a "one-go": i.e. without > >> the need to create the "intermediate" variable called > >> "speed_vehicles" and with the use of the function weighted.mean() > >> > >> any hints for a different approach much appreciated > >> > >> thanks > >> > >> > >> > >> Da: "Massimo Bressan" <massimo.bressan at arpa.veneto.it> > >> A: "r-help" <r-help at r-project.org> > >> Inviato: Gioved?, 9 novembre 2017 12:20:52 > >> Oggetto: weighted average grouped by variables > >> > >> hi all > >> > >> I have this dataframe (created as a reproducible example) > >> > >> mydf<-structure(list(date_time = structure(c(1508238000, 1508238000, > >> 1508238000, 1508238000, 1508238000, 1508238000, 1508238000), class > >> c("POSIXct", "POSIXt"), tzone = ""), direction = structure(c(1L, 1L, > >> 1L, 1L, 2L, 2L, 2L), .Label = c("A", "B"), class = "factor"), type > >> structure(c(1L, 2L, 3L, 4L, 1L, 2L, 3L), .Label = c("car", > >> "light_duty", "heavy_duty", "motorcycle"), class = "factor"), > >> avg_speed = c(41.1029082774049, 40.3333333333333, 40.3157894736842, > >> 36.0869565217391, 33.4065155807365, 37.6222222222222, 35.5), > >> n_vehicles = c(447L, 24L, 19L, 23L, 706L, 45L, 26L)), .Names > >> c("date_time", "direction", "type", "speed", "n_vehicles"), row.names > >> = c(NA, -7L), class = "data.frame") > >> > >> mydf > >> > >> and I need to get to this final result > >> > >> mydf_final<-structure(list(date_time = structure(c(1508238000, > >> 1508238000, 1508238000, 1508238000), class = c("POSIXct", "POSIXt"), > >> tzone = ""), type = structure(c(1L, 2L, 3L, 4L), .Label = c("car", > >> "light_duty", "heavy_duty", "motorcycle"), class = "factor"), > >> weighted_avg_speed = c(36.39029, 38.56521, 37.53333, 36.08696), > >> n_vehicles = c(1153L,69L,45L,23L)), .Names = c("date_time", "type", > >> "weighted_avg_speed", "n_vehicles"), row.names = c(NA, -4L), class > >> "data.frame") > >> > >> mydf_final > >> > >> > >> my question: > >> how to compute a weighted mean i.e. "weighted_avg_speed" > >> from "speed" (the values whose weighted mean is to be computed) and > >> "n_vehicles" (the weights) grouped by "date_time" and "type"? > >> > >> to be noted the complication of the case "motorcycle" (not present in > >> both > >> directions) > >> > >> any help for that? > >> > >> thank you > >> > >> max > >> > >> > >> > >> -- > >> > >> ------------------------------------------------------------ > >> Massimo Bressan > >> > >> ARPAV > >> Agenzia Regionale per la Prevenzione e Protezione Ambientale del > >> Veneto > >> > >> Dipartimento Provinciale di Treviso > >> Via Santa Barbara, 5/a > >> 31100 Treviso, Italy > >> > >> tel: +39 0422 558545 > >> fax: +39 0422 558516 > >> e-mail: massimo.bressan at arpa.veneto.it > >> ------------------------------------------------------------ > >> > >> > >> [[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. > > ______________________________________________ > > 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.