Hi again,
I am facing trouble to match a vector strings. Let say I have below
full string vector
WhereToLook = c("ultracemco.bo.openam" ,
"ultracemco.bo.higham"
,"ultracemco.bo.lowam" , "ultracemco.bo.closeam" ,
"ultracemco.bo.volumeam" ,"ultracemco.bo.adjustedam")
WhatToLook = c("volume", "close")
Basically I need to find the positions of WhatToLook in WhereToLook.
So my code goes as below :
> pmatch(tolower(colnames(WhereToLook)), WhatToLook)
integer(0)
Although I was expecting my code would point 5 & 4 respectively.
Appreciate if someone points as correct code for above case.
Thanks,
try this:> WhereToLook = c("ultracemco.bo.openam" , "ultracemco.bo.higham"+ ,"ultracemco.bo.lowam" , "ultracemco.bo.closeam" , + "ultracemco.bo.volumeam" ,"ultracemco.bo.adjustedam")> > WhatToLook = c("volume", "close") > > # create pattern match > pat <- paste(WhatToLook, collapse = "|") > grep(pat, WhereToLook)[1] 4 5 Jim Holtman Data Munger Guru What is the problem that you are trying to solve? Tell me what you want to do, not how you want to do it. On Sat, Jun 4, 2016 at 1:28 PM, Christofer Bogaso < bogaso.christofer at gmail.com> wrote:> Hi again, > > I am facing trouble to match a vector strings. Let say I have below > full string vector > > WhereToLook = c("ultracemco.bo.openam" , "ultracemco.bo.higham" > ,"ultracemco.bo.lowam" , "ultracemco.bo.closeam" , > "ultracemco.bo.volumeam" ,"ultracemco.bo.adjustedam") > > WhatToLook = c("volume", "close") > > Basically I need to find the positions of WhatToLook in WhereToLook. > So my code goes as below : > > > pmatch(tolower(colnames(WhereToLook)), WhatToLook) > integer(0) > > > Although I was expecting my code would point 5 & 4 respectively. > > Appreciate if someone points as correct code for above case. > > Thanks, > > ______________________________________________ > 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. >[[alternative HTML version deleted]]
Please (re)-read the Help file for pmatch, which says: ... " (A partial match occurs if the whole of the element of x matches the beginning of the element of table.) " This is clearly not your situation. One approach (there may be others depending on what your detailed situation actually is) is to use regular expressions: ?regexp ?regexpr Cheers, Bert Bert Gunter "The trouble with having an open mind is that people keep coming along and sticking things into it." -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip ) On Sat, Jun 4, 2016 at 10:28 AM, Christofer Bogaso <bogaso.christofer at gmail.com> wrote:> Hi again, > > I am facing trouble to match a vector strings. Let say I have below > full string vector > > WhereToLook = c("ultracemco.bo.openam" , "ultracemco.bo.higham" > ,"ultracemco.bo.lowam" , "ultracemco.bo.closeam" , > "ultracemco.bo.volumeam" ,"ultracemco.bo.adjustedam") > > WhatToLook = c("volume", "close") > > Basically I need to find the positions of WhatToLook in WhereToLook. > So my code goes as below : > >> pmatch(tolower(colnames(WhereToLook)), WhatToLook) > integer(0) > > > Although I was expecting my code would point 5 & 4 respectively. > > Appreciate if someone points as correct code for above case. > > Thanks, > > ______________________________________________ > 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.