Hi --
I'm looking for alternatives to regex for a fairly simply
'reformatting'
problem. Alternatives only because a lot of folks have trouble
parsing/interpreting regex expressions, and I'm looking for suggestions
for something more 'transparent'.
Here is an example of what I'm trying to do. Take the following string,
which I call x, and for each character in the string, replace that
character with the character, followed by a decimal. The following big
of regex works...and illustrates the reformatting I'm after:
x <- '10110111'
print(x)
y <- sub("\\s+$", "", gsub('(.{1})',
'\\1.', x))
print(y)
I had a look at formatC or prettyNum as another way to get there from
here, but couldn't get it to work:
x <- '10110111'
hold <- prettyNum(as.numeric(x), big.mark = ".", big.interval = 1,
??????? format = "d", flag = "0", width = nchar(x))
print(hold)
I tried making big.mark a decimal, but that fails, since it confuses
'prettyNum'. OK, so I try a 2-step approach
x <- '10110111'
hold <- prettyNum(as.numeric(x), big.mark = "x", big.interval = 1,
??????? format = "d", flag = "00", width = nchar(x))
hold2 <- (gsub("x",".",hold))
print(hold2)
Seems to work, but...doesn't work (at least, based on what I tried) if
the first character(s) in the string are 0's. [Whereas the regex
approach handles this just fine...]
x <- '0010110111'
hold <- prettyNum(as.numeric(x), big.mark = "x", big.interval = 1,
??????? format = "d", flag = "00", width = nchar(x))
hold2 <- (gsub("x",".",hold))
print(hold2)
Basically, it strips off the leading 0's. I'm sure I'm missing
something
with prettyNum/formatC, but I'm also guessing there are alternatives.
Suggestions?
Thanks in advance.
Hi I am not sure if it is more readable> paste(paste(unlist(strsplit(x,"")),".", sep=""), collapse="")[1] "1.0.1.1.0.1.1.1." If you did not want last dot, it is a bit shorter.> paste(unlist(strsplit(x,"")),collapse=".")[1] "1.0.1.1.0.1.1.1">Cheers Petr Tento e-mail a jak?koliv k n?mu p?ipojen? dokumenty jsou d?v?rn? a podl?haj? tomuto pr?vn? z?vazn?mu prohl??en? o vylou?en? odpov?dnosti: https://www.precheza.cz/01-dovetek/ | This email and any documents attached to it may be confidential and are subject to the legally binding disclaimer: https://www.precheza.cz/en/01-disclaimer/> -----Original Message----- > From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of Evan Cooch > Sent: Friday, May 25, 2018 3:43 PM > To: R-help <r-help at r-project.org> > Subject: [R] options other than regex > > Hi -- > > I'm looking for alternatives to regex for a fairly simply 'reformatting' > problem. Alternatives only because a lot of folks have trouble > parsing/interpreting regex expressions, and I'm looking for suggestions for > something more 'transparent'. > > Here is an example of what I'm trying to do. Take the following string, which I > call x, and for each character in the string, replace that character with the > character, followed by a decimal. The following big of regex works...and > illustrates the reformatting I'm after: > > x <- '10110111' > print(x) > > y <- sub("\\s+$", "", gsub('(.{1})', '\\1.', x)) > print(y) > > I had a look at formatC or prettyNum as another way to get there from here, > but couldn't get it to work: > > x <- '10110111' > hold <- prettyNum(as.numeric(x), big.mark = ".", big.interval = 1, > format = "d", flag = "0", width = nchar(x)) > print(hold) > > > I tried making big.mark a decimal, but that fails, since it confuses 'prettyNum'. > OK, so I try a 2-step approach > > x <- '10110111' > hold <- prettyNum(as.numeric(x), big.mark = "x", big.interval = 1, > format = "d", flag = "00", width = nchar(x)) > hold2 <- (gsub("x",".",hold)) > print(hold2) > > Seems to work, but...doesn't work (at least, based on what I tried) if the first > character(s) in the string are 0's. [Whereas the regex approach handles this just > fine...] > > > x <- '0010110111' > hold <- prettyNum(as.numeric(x), big.mark = "x", big.interval = 1, > format = "d", flag = "00", width = nchar(x)) > hold2 <- (gsub("x",".",hold)) > print(hold2) > > > Basically, it strips off the leading 0's. I'm sure I'm missing something with > prettyNum/formatC, but I'm also guessing there are alternatives. > Suggestions? > > Thanks in advance. > > ______________________________________________ > 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. 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Thanks, another good idea. On 5/25/2018 11:30 AM, PIKAL Petr wrote:> Hi > I am not sure if it is more readable > >> paste(paste(unlist(strsplit(x,"")),".", sep=""), collapse="") > [1] "1.0.1.1.0.1.1.1." > > If you did not want last dot, it is a bit shorter. >> paste(unlist(strsplit(x,"")),collapse=".") > [1] "1.0.1.1.0.1.1.1" > Cheers > Petr > Tento e-mail a jak?koliv k n?mu p?ipojen? dokumenty jsou d?v?rn? a podl?haj? tomuto pr?vn? z?vazn?mu prohl??en? o vylou?en? odpov?dnosti: https://www.precheza.cz/01-dovetek/ | This email and any documents attached to it may be confidential and are subject to the legally binding disclaimer: https://www.precheza.cz/en/01-disclaimer/ > >> -----Original Message----- >> From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of Evan Cooch >> Sent: Friday, May 25, 2018 3:43 PM >> To: R-help <r-help at r-project.org> >> Subject: [R] options other than regex >> >> Hi -- >> >> I'm looking for alternatives to regex for a fairly simply 'reformatting' >> problem. Alternatives only because a lot of folks have trouble >> parsing/interpreting regex expressions, and I'm looking for suggestions for >> something more 'transparent'. >> >> Here is an example of what I'm trying to do. Take the following string, which I >> call x, and for each character in the string, replace that character with the >> character, followed by a decimal. The following big of regex works...and >> illustrates the reformatting I'm after: >> >> x <- '10110111' >> print(x) >> >> y <- sub("\\s+$", "", gsub('(.{1})', '\\1.', x)) >> print(y) >> >> I had a look at formatC or prettyNum as another way to get there from here, >> but couldn't get it to work: >> >> x <- '10110111' >> hold <- prettyNum(as.numeric(x), big.mark = ".", big.interval = 1, >> format = "d", flag = "0", width = nchar(x)) >> print(hold) >> >> >> I tried making big.mark a decimal, but that fails, since it confuses 'prettyNum'. >> OK, so I try a 2-step approach >> >> x <- '10110111' >> hold <- prettyNum(as.numeric(x), big.mark = "x", big.interval = 1, >> format = "d", flag = "00", width = nchar(x)) >> hold2 <- (gsub("x",".",hold)) >> print(hold2) >> >> Seems to work, but...doesn't work (at least, based on what I tried) if the first >> character(s) in the string are 0's. [Whereas the regex approach handles this just >> fine...] >> >> >> x <- '0010110111' >> hold <- prettyNum(as.numeric(x), big.mark = "x", big.interval = 1, >> format = "d", flag = "00", width = nchar(x)) >> hold2 <- (gsub("x",".",hold)) >> print(hold2) >> >> >> Basically, it strips off the leading 0's. I'm sure I'm missing something with >> prettyNum/formatC, but I'm also guessing there are alternatives. >> Suggestions? >> >> Thanks in advance. >> >> ______________________________________________ >> 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.[[alternative HTML version deleted]]
Evan, are you really looking at numbers, or just at character strings (that, in your case, happen to be numbers)? if just characters, this rather odd combination of strsplit() and Reduce() might do the trick: ----> x <- '10110111' > print(x)[1] "10110111"> y <- Reduce(function (x,y) { paste(x, y, sep=".") }, unlist(strsplit(x, "")), init="", right=TRUE) > print(y)[1] "1.0.1.1.0.1.1.1." ---- cheers.
Numbers -- thanks. Another clever trick. On 5/25/2018 11:54 AM, Greg Minshall wrote:> Evan, > > are you really looking at numbers, or just at character strings (that, > in your case, happen to be numbers)? if just characters, this rather > odd combination of strsplit() and Reduce() might do the trick: > ---- >> x <- '10110111' >> print(x) > [1] "10110111" >> y <- Reduce(function (x,y) { paste(x, y, sep=".") }, unlist(strsplit(x, "")), init="", right=TRUE) >> print(y) > [1] "1.0.1.1.0.1.1.1." > ---- > > cheers. > . >[[alternative HTML version deleted]]