Hi Duncan I tried Ecdf and/or wtd.quantile from Hmisc and it is working (probably). Ecdf(x, q=.5) Ecdf(x, weights=xw,col=2, add=T, q=.5) wtd.quantile(x) 0% 25% 50% 75% 100% 10 10 10 100 300 wtd.quantile(x, weights=xw, type="i/n") 0% 25% 50% 75% 100% 10.0000 138.8667 192.5778 246.2889 300.0000 But could you please be more specific in this?> But you seem to be asking about a > definition rather than a function: it is obtained simply by normalizing the > weights to sum to 1, then evaluating cumulative sums of them.Actually, when I correctly calculate weights xw <- (x^3)/sum(x^3) sum(xw) equals to 1 but how can I plot ecdf with volume weighted data. Obviously ecdf(x*xw) or ecdf(x^3*xw) is not correct. Cheers Petr> -----Original Message----- > From: Duncan Murdoch [mailto:murdoch.duncan at gmail.com] > Sent: Friday, November 24, 2017 12:36 PM > To: PIKAL Petr <petr.pikal at precheza.cz>; r-help at r-project.org > Subject: Re: [R] number to volume weighted distribution > > On 24/11/2017 6:27 AM, PIKAL Petr wrote: > > Dear all > > > > Strictly speaking it is not R question but as you are the most capable persons I > know I give it a try. > > > > I am strugling with recalculation of number weighted to volume weighted > distribution. > > > > Suppose I have objects (cubes) with size > > > > x<- c(rep(10,20), rep(100, 10), rep(300,5)) I can get > > > > plot(ecdf(x)) > > > > or the number weighted average > > > > mean(x) > > [1] 77.14286 > > > > or volume weighted average > > weighted.mean(x, (x/sum(x^3))) > > [1] 204.4444 > > > > However I am struggling with volume weighted ecdf. > > > > Can you please give me some hints? > > I believe base R doesn't have a function for this, but Google says it exists in a > couple of packages: spatstat, Hmisc. But you seem to be asking about a > definition rather than a function: it is obtained simply by normalizing the > weights to sum to 1, then evaluating cumulative sums of them. > > Duncan Murdoch________________________________ 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.
Hi Petr, I think that Duncan suggests something like this: x<- c(rep(10,20), rep(300,5), rep(100, 10)) tx <- table(x) prop.x <- tx / sum(tx) vx <- as.integer(names(tx)) prop.wx <- tx * vx / sum(tx * vx) plot(ecdf(x)) plot(vx, cumsum(prop.x), ylim = 0:1) plot(vx, cumsum(prop.wx), ylim = 0:1) Best regards, Thierry ir. Thierry Onkelinx Statisticus / Statistician Vlaamse Overheid / Government of Flanders INSTITUUT VOOR NATUUR- EN BOSONDERZOEK / RESEARCH INSTITUTE FOR NATURE AND FOREST Team Biometrie & Kwaliteitszorg / Team Biometrics & Quality Assurance thierry.onkelinx at inbo.be Kliniekstraat 25, B-1070 Brussel www.inbo.be /////////////////////////////////////////////////////////////////////////////////////////// To call in the statistician after the experiment is done may be no more than asking him to perform a post-mortem examination: he may be able to say what the experiment died of. ~ Sir Ronald Aylmer Fisher The plural of anecdote is not data. ~ Roger Brinner The combination of some data and an aching desire for an answer does not ensure that a reasonable answer can be extracted from a given body of data. ~ John Tukey /////////////////////////////////////////////////////////////////////////////////////////// Van 14 tot en met 19 december 2017 verhuizen we uit onze vestiging in Brussel naar het Herman Teirlinckgebouw op de site Thurn & Taxis. Vanaf dan ben je welkom op het nieuwe adres: Havenlaan 88 bus 73, 1000 Brussel. /////////////////////////////////////////////////////////////////////////////////////////// 2017-11-24 14:30 GMT+01:00 PIKAL Petr <petr.pikal at precheza.cz>:> Hi Duncan > > I tried Ecdf and/or wtd.quantile from Hmisc and it is working (probably). > Ecdf(x, q=.5) > Ecdf(x, weights=xw,col=2, add=T, q=.5) > wtd.quantile(x) > 0% 25% 50% 75% 100% > 10 10 10 100 300 > wtd.quantile(x, weights=xw, type="i/n") > 0% 25% 50% 75% 100% > 10.0000 138.8667 192.5778 246.2889 300.0000 > > But could you please be more specific in this? > >> But you seem to be asking about a >> definition rather than a function: it is obtained simply by normalizing the >> weights to sum to 1, then evaluating cumulative sums of them. > > Actually, when I correctly calculate weights > > xw <- (x^3)/sum(x^3) > sum(xw) equals to 1 > > but how can I plot ecdf with volume weighted data. Obviously > > ecdf(x*xw) or ecdf(x^3*xw) is not correct. > > Cheers > Petr > >> -----Original Message----- >> From: Duncan Murdoch [mailto:murdoch.duncan at gmail.com] >> Sent: Friday, November 24, 2017 12:36 PM >> To: PIKAL Petr <petr.pikal at precheza.cz>; r-help at r-project.org >> Subject: Re: [R] number to volume weighted distribution >> >> On 24/11/2017 6:27 AM, PIKAL Petr wrote: >> > Dear all >> > >> > Strictly speaking it is not R question but as you are the most capable persons I >> know I give it a try. >> > >> > I am strugling with recalculation of number weighted to volume weighted >> distribution. >> > >> > Suppose I have objects (cubes) with size >> > >> > x<- c(rep(10,20), rep(100, 10), rep(300,5)) I can get >> > >> > plot(ecdf(x)) >> > >> > or the number weighted average >> > >> > mean(x) >> > [1] 77.14286 >> > >> > or volume weighted average >> > weighted.mean(x, (x/sum(x^3))) >> > [1] 204.4444 >> > >> > However I am struggling with volume weighted ecdf. >> > >> > Can you please give me some hints? >> >> I believe base R doesn't have a function for this, but Google says it exists in a >> couple of packages: spatstat, Hmisc. But you seem to be asking about a >> definition rather than a function: it is obtained simply by normalizing the >> weights to sum to 1, then evaluating cumulative sums of them. >> >> Duncan Murdoch > > ________________________________ > 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 Thierry Thanks for clarifiyng. I spoke about using ecdf because it gives me possibility to calculate proportion of objects below some threshold (quantiles) quite easily. quantInv <- function(distr, value) ecdf(distr)(value)> quantInv(x,80)*100[1] 57.14286 I believe that such value could be calculated from this cumsum construction too. However with real data (hundereds of "x" values), Ecdf and wtd.quantile works quite good so I can live without it (I do not want to reinvent wheel). Thanks again. Cheers Petr> -----Original Message----- > From: Thierry Onkelinx [mailto:thierry.onkelinx at inbo.be] > Sent: Friday, November 24, 2017 10:02 PM > To: PIKAL Petr <petr.pikal at precheza.cz> > Cc: Duncan Murdoch <murdoch.duncan at gmail.com>; r-help at r-project.org > Subject: Re: [R] number to volume weighted distribution > > Hi Petr, > > I think that Duncan suggests something like this: > > x<- c(rep(10,20), rep(300,5), rep(100, 10)) tx <- table(x) > > prop.x <- tx / sum(tx) > vx <- as.integer(names(tx)) > prop.wx <- tx * vx / sum(tx * vx) > > plot(ecdf(x)) > plot(vx, cumsum(prop.x), ylim = 0:1) > plot(vx, cumsum(prop.wx), ylim = 0:1) > > Best regards, > > Thierry > > ir. Thierry Onkelinx > Statisticus / Statistician > > Vlaamse Overheid / Government of Flanders INSTITUUT VOOR NATUUR- EN > BOSONDERZOEK / RESEARCH INSTITUTE FOR NATURE AND FOREST Team > Biometrie & Kwaliteitszorg / Team Biometrics & Quality Assurance > thierry.onkelinx at inbo.be Kliniekstraat 25, B-1070 Brussel www.inbo.be > > > > > 2017-11-24 14:30 GMT+01:00 PIKAL Petr <petr.pikal at precheza.cz>: > > Hi Duncan > > > > I tried Ecdf and/or wtd.quantile from Hmisc and it is working (probably). > > Ecdf(x, q=.5) > > Ecdf(x, weights=xw,col=2, add=T, q=.5) > > wtd.quantile(x) > > 0% 25% 50% 75% 100% > > 10 10 10 100 300 > > wtd.quantile(x, weights=xw, type="i/n") > > 0% 25% 50% 75% 100% > > 10.0000 138.8667 192.5778 246.2889 300.0000 > > > > But could you please be more specific in this? > > > >> But you seem to be asking about a > >> definition rather than a function: it is obtained simply by > >> normalizing the weights to sum to 1, then evaluating cumulative sums of > them. > > > > Actually, when I correctly calculate weights > > > > xw <- (x^3)/sum(x^3) > > sum(xw) equals to 1 > > > > but how can I plot ecdf with volume weighted data. Obviously > > > > ecdf(x*xw) or ecdf(x^3*xw) is not correct. > > > > Cheers > > Petr > > > >> -----Original Message----- > >> From: Duncan Murdoch [mailto:murdoch.duncan at gmail.com] > >> Sent: Friday, November 24, 2017 12:36 PM > >> To: PIKAL Petr <petr.pikal at precheza.cz>; r-help at r-project.org > >> Subject: Re: [R] number to volume weighted distribution > >> > >> On 24/11/2017 6:27 AM, PIKAL Petr wrote: > >> > Dear all > >> > > >> > Strictly speaking it is not R question but as you are the most > >> > capable persons I > >> know I give it a try. > >> > > >> > I am strugling with recalculation of number weighted to volume > >> > weighted > >> distribution. > >> > > >> > Suppose I have objects (cubes) with size > >> > > >> > x<- c(rep(10,20), rep(100, 10), rep(300,5)) I can get > >> > > >> > plot(ecdf(x)) > >> > > >> > or the number weighted average > >> > > >> > mean(x) > >> > [1] 77.14286 > >> > > >> > or volume weighted average > >> > weighted.mean(x, (x/sum(x^3))) > >> > [1] 204.4444 > >> > > >> > However I am struggling with volume weighted ecdf. > >> > > >> > Can you please give me some hints? > >> > >> I believe base R doesn't have a function for this, but Google says it > >> exists in a couple of packages: spatstat, Hmisc. But you seem to be > >> asking about a definition rather than a function: it is obtained > >> simply by normalizing the weights to sum to 1, then evaluating cumulative > sums of them. > >> > >> Duncan Murdoch > >________________________________ 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.