All,
I have a file named as so 313929BL4FNMA2432.rds ?the user may pass either the
first 9 character or the last six characters. ?I need to match the remainder of
the file name using either the first nine or last six. ?I have read the help
files for Regular Expression as used in R and I think what I want to use is
glob2rx. ?
I have worked a minimal example to test my code:
id <- "313929BL4FNMA2432.rds"
cusip <- "313929BL4"
poolnumm <- "FNMA2432"
paste(cusip, ".*", ".rds")
glob2rx(paste(cusip, ".*", ".rds"), trim.head = TRUE,
trim.tail = TRUE)
This returns false which leads me to believe that it is not working
glob2rx(paste(cusip, ".*", ".rds"), trim.head = TRUE,
trim.tail = TRUE) == id
I am going to use as follows in the function below - which returns the error
file not found
MBS_Test <- function(MBS.id = "character"){
MBS <- glob2rx(paste(MBS.id, ".*", "//.rds", sep =
""), trim.tail = TRUE)
MBS.Conn <- gzfile(description = paste(system.file(package =
"BondLab"),
"/BondData/", MBS, sep = ""), open = "rb")
MBS <- readRDS(MBS.Conn)
on.exit(close.connection(MBS.Conn))
return(MBS)
} ??
Any help to get me in the right direction is appreciated - Glenn
On 29/01/2016 12:02 PM, Glenn Schultz wrote:> All, > > I have a file named as so 313929BL4FNMA2432.rds the user may pass either the first 9 character or the last six characters. I need to match the remainder of the file name using either the first nine or last six. I have read the help files for Regular Expression as used in R and I think what I want to use is glob2rx. > > I have worked a minimal example to test my code: > > id <- "313929BL4FNMA2432.rds" > cusip <- "313929BL4" > poolnumm <- "FNMA2432" > paste(cusip, ".*", ".rds") > glob2rx(paste(cusip, ".*", ".rds"), trim.head = TRUE, trim.tail = TRUE) > > This returns false which leads me to believe that it is not workingNo, it returns a regular expression. You need to tell us what you really did if you want help fixing it. Duncan Murdoch> glob2rx(paste(cusip, ".*", ".rds"), trim.head = TRUE, trim.tail = TRUE) == id > > I am going to use as follows in the function below - which returns the error file not found > > MBS_Test <- function(MBS.id = "character"){ > MBS <- glob2rx(paste(MBS.id, ".*", "//.rds", sep = ""), trim.tail = TRUE) > MBS.Conn <- gzfile(description = paste(system.file(package = "BondLab"), > "/BondData/", MBS, sep = ""), open = "rb") > MBS <- readRDS(MBS.Conn) > on.exit(close.connection(MBS.Conn)) > return(MBS) > } > > Any help to get me in the right direction is appreciated - Glenn > ______________________________________________ > 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 Maybe I am completely wrong but do you really need regular expressions? You say you want to compare first nine characters of id?> substr(id, 1,9)==cusip[1] TRUE>or the last six?> substr(id, nchar(id)-6, nchar(id))=="432.rds"[1] TRUE>Cheers Petr> -----Original Message----- > From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of Glenn > Schultz > Sent: Friday, January 29, 2016 6:02 PM > To: R Help R > Subject: [R] String Matching > > All, > > I have a file named as so 313929BL4FNMA2432.rds the user may pass > either the first 9 character or the last six characters. I need to > match the remainder of the file name using either the first nine or > last six. I have read the help files for Regular Expression as used in > R and I think what I want to use is glob2rx. > > I have worked a minimal example to test my code: > > id <- "313929BL4FNMA2432.rds" > cusip <- "313929BL4" > poolnumm <- "FNMA2432" > paste(cusip, ".*", ".rds") > glob2rx(paste(cusip, ".*", ".rds"), trim.head = TRUE, trim.tail = TRUE) > > This returns false which leads me to believe that it is not working > glob2rx(paste(cusip, ".*", ".rds"), trim.head = TRUE, trim.tail = TRUE) > == id > > I am going to use as follows in the function below - which returns the > error file not found > > MBS_Test <- function(MBS.id = "character"){ MBS <- > glob2rx(paste(MBS.id, ".*", "//.rds", sep = ""), trim.tail = TRUE) > MBS.Conn <- gzfile(description = paste(system.file(package > "BondLab"), "/BondData/", MBS, sep = ""), open = "rb") MBS <- > readRDS(MBS.Conn) > on.exit(close.connection(MBS.Conn)) > return(MBS) > } > > Any help to get me in the right direction is appreciated - Glenn > ______________________________________________ > 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.
> On 1 Feb 2016, at 08:03, PIKAL Petr <petr.pikal at precheza.cz> wrote: > > Hi > > Maybe I am completely wrong but do you really need regular expressions? > > You say you want to compare first nine characters of id? > >> substr(id, 1,9)==cusip > [1] TRUE >> > > or the last six? > >> substr(id, nchar(id)-6, nchar(id))=="432.rds" > [1] TRUE >> > > Cheers > Petr > > >> -----Original Message----- >> From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of Glenn >> Schultz >> Sent: Friday, January 29, 2016 6:02 PM >> To: R Help R >> Subject: [R] String Matching >> >> All, >> >> I have a file named as so 313929BL4FNMA2432.rds the user may pass >> either the first 9 character or the last six characters. I need to >> match the remainder of the file name using either the first nine or >> last six. I have read the help files for Regular Expression as used in >> R and I think what I want to use is glob2rx. >> >> I have worked a minimal example to test my code: >> >> id <- "313929BL4FNMA2432.rds" >> cusip <- "313929BL4" >> poolnumm <- "FNMA2432" >> paste(cusip, ".*", ".rds") >> glob2rx(paste(cusip, ".*", ".rds"), trim.head = TRUE, trim.tail = TRUE) >> >> This returns false which leads me to believe that it is not working >> glob2rx(paste(cusip, ".*", ".rds"), trim.head = TRUE, trim.tail = TRUE) >> == id >> >> I am going to use as follows in the function below - which returns the >> error file not found >> >> MBS_Test <- function(MBS.id = "character"){ MBS <- >> glob2rx(paste(MBS.id, ".*", "//.rds", sep = ""), trim.tail = TRUE) >> MBS.Conn <- gzfile(description = paste(system.file(package >> "BondLab"), "/BondData/", MBS, sep = ""), open = "rb") MBS <- >> readRDS(MBS.Conn) >> on.exit(close.connection(MBS.Conn)) >> return(MBS) >> } >>I don't think you are using (glob) wild characters correctly; where you write .* you likely need *? In addition why not use paste0, which does not use <space> as separator, instead of paste? Finally your poolnumm variable consists of 8 characters and not 6. If you change your minimal example to this: paste0(cusip, "*", ".rds") glob2rx(paste0(cusip, "*", ".rds")) grepl(glob2rx(paste0(cusip, "*", ".rds")), id) grepl(glob2rx(paste0("*", poolnumm, ".rds")), id) you get TRUE twice. But Petr's solution for the first 9 characters is much simpler. And for matching the last 6 (8) you'll have to remove the extension first and then use substr (if I understand your problem correctly). Berend