Baba s
2016-Jan-28 01:41 UTC
[R] Read all the 332 files and count the number of complete rows
Hi, I want this function to read all the 332 files and count the number of complete rows in the data. When I run this function, I am getting only the last one. It should give me id and rowcount for 332 files in one vector. What am I doing wrong in this code? complete<-function(id=1:332){ all_files<-list.files() for (i in id){ ncases<-nrow(na.omit(read.csv(all_files[i]))) idcase<-cbind(id,ncases)} } Regards, Sai. [[alternative HTML version deleted]]
PIKAL Petr
2016-Jan-28 06:41 UTC
[R] Read all the 332 files and count the number of complete rows
Hi Just to clarify. Both id and and ncases are numbers. You say you want a vector. In that case just plain idcase<-c(idcase,ncases) shall give you desired vector, provided you initialize idcase before cycle by idcase <- NA The code itself is suboptimal but if you have only couple of files it does not matter much. If you wanted some other result please explain it by dput(expectedresult) Cheers Petr -----Original Message----- From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of Baba s Sent: Thursday, January 28, 2016 2:42 AM To: r-help at r-project.org Subject: [R] Read all the 332 files and count the number of complete rows Hi, I want this function to read all the 332 files and count the number of complete rows in the data. When I run this function, I am getting only the last one. It should give me id and rowcount for 332 files in one vector. What am I doing wrong in this code? complete<-function(id=1:332){ all_files<-list.files() for (i in id){ ncases<-nrow(na.omit(read.csv(all_files[i]))) idcase<-cbind(id,ncases)} } Regards, Sai. [[alternative HTML version deleted]] ______________________________________________ R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide 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.
David Winsemius
2016-Jan-28 06:58 UTC
[R] Read all the 332 files and count the number of complete rows
The number 332 suggests that this is homework from Peng's online class. Isn't there there a website for questions regarding these exercises? I have observed a fair number of similar question on StackOverflow over the years so you might also search there, since your error is a fairly common one. Homework on StackOverflow is not deprecated if the question demonstrates effort and a good description of the difficulty (both of which I do see.) After completing your course, you may want to read the Posting Guide, subscribe to rhelp, but please do use plain text. -- David.> On Jan 27, 2016, at 10:41 PM, PIKAL Petr <petr.pikal at precheza.cz> wrote: > > Hi > > Just to clarify. > Both id and and ncases are numbers. You say you want a vector. In that case just plain > > idcase<-c(idcase,ncases) > > shall give you desired vector, provided you initialize idcase before cycle by > > idcase <- NA > > The code itself is suboptimal but if you have only couple of files it does not matter much. > > If you wanted some other result please explain it by dput(expectedresult) > > Cheers > Petr > > -----Original Message----- > From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of Baba s > Sent: Thursday, January 28, 2016 2:42 AM > To: r-help at r-project.org > Subject: [R] Read all the 332 files and count the number of complete rows > > Hi, > > I want this function to read all the 332 files and count the number of complete rows in the data. When I run this function, I am getting only the last one. > It should give me id and rowcount for 332 files in one vector. > > What am I doing wrong in this code? > > complete<-function(id=1:332){ > all_files<-list.files() > for (i in id){ > ncases<-nrow(na.omit(read.csv(all_files[i]))) > idcase<-cbind(id,ncases)} > } > > Regards, > Sai. > > [[alternative HTML version deleted]] > > ______________________________________________ >David Winsemius Alameda, CA, USA