Re: [R] OT UNIX grep question
Hi, You have to learn about regular expressions. Then you'll come up with something like : grep ^dog$ /usr/share/dict/words Cheers, Romain Selon Erin Hodgess [EMAIL PROTECTED]: Dear R People: I want to use the grep command in UNIX/Linux to check some words from the dictionary. Let's say I use: grep dog /usr/share/dict/words and I get back bulldog dog dogged and so on. How could I just get back dog with the grep command please? Thanks, Sincerely Erin Hodgess Associate Professor Department of Computer and Mathematical Sciences University of Houston - Downtown mailto: [EMAIL PROTECTED] __ R-help@stat.math.ethz.ch mailing list 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. __ R-help@stat.math.ethz.ch mailing list 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.
Re: [R] OT UNIX grep question
[EMAIL PROTECTED] wrote: You have to learn about regular expressions. Then you'll come up with something like : grep ^dog$ /usr/share/dict/words *You* have to learn about shell syntax. The foregoing doesn't work; it gives an ``Illegal variable name.'' error. To protect against the shell interpretation of the dollar sign you have to use *single* quotes. grep '^dog$' /usr/share/dict/words *does* work. (Try it!) cheers, Rolf Turner [EMAIL PROTECTED] __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] OT UNIX grep question
On 10/08/06, Rolf Turner [EMAIL PROTECTED] wrote: [EMAIL PROTECTED] wrote: grep '^dog$' /usr/share/dict/words or (simpler, in my view) grep -w dog /usr/share/dict/words Chris. [[alternative HTML version deleted]] __ R-help@stat.math.ethz.ch mailing list 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.
Re: [R] OT UNIX grep question
On Thu, Aug 10, 2006 at 08:51:36AM -0300, Rolf Turner wrote: [EMAIL PROTECTED] wrote: You have to learn about regular expressions. Then you'll come up with something like : grep ^dog$ /usr/share/dict/words *You* have to learn about shell syntax. The foregoing doesn't work; it gives an ``Illegal variable name.'' error. To protect against the shell interpretation of the dollar sign you have to use *single* quotes. grep '^dog$' /usr/share/dict/words *does* work. (Try it!) you're perfectly right about single quotes being the correct thing to use here, but not all shells are insisting on linguistic correctness the way [t]csh does. bash leaves constructs that it cannot expand as they are, so the variant with double quotes does work as expected with bash (although through a mechanism that might be unexpected by most). Best regards, Jan -- +- Jan T. Kim ---+ | email: [EMAIL PROTECTED] | | WWW: http://www.cmp.uea.ac.uk/people/jtk | *-= hierarchical systems are for files, not for humans =-* __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] OT UNIX grep question
Selon Rolf Turner [EMAIL PROTECTED]: [EMAIL PROTECTED] wrote: You have to learn about regular expressions. Then you'll come up with something like : grep ^dog$ /usr/share/dict/words *You* have to learn about shell syntax. The foregoing doesn't work; it gives an ``Illegal variable name.'' error. To protect against the shell interpretation of the dollar sign you have to use *single* quotes. grep '^dog$' /usr/share/dict/words *does* work. (Try it!) Hi, Sorry for inconvenience, both are working on my fedora gnu/linux bash, Jan gave the explanation (Thanks!). BTW, did you really think I didn't try the double quote call ? But do not hesitate if **you** see something **I** should learn. Cheers, Romain __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] OT UNIX grep question
Selon Chris wallace [EMAIL PROTECTED]: On 10/08/06, Rolf Turner [EMAIL PROTECTED] wrote: [EMAIL PROTECTED] wrote: grep '^dog$' /usr/share/dict/words or (simpler, in my view) grep -w dog /usr/share/dict/words Chris. Well, for the record it's does not work with my settings. Maybe *Mr Turner* can give you a lesson as well. Sorry I'm just in the mood for a joke ... Romain $ grep -w dog /usr/share/dict/words bird-dog bull-dog cat-and-dog dog dog-banner water-dog wolf-dog yellow-dog __ R-help@stat.math.ethz.ch mailing list 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.
Re: [R] OT UNIX grep question
On 10/08/06, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: Selon Chris wallace [EMAIL PROTECTED]: grep -w dog /usr/share/dict/words Well, for the record it's does not work with my settings. Maybe *Mr Turner* can give you a lesson as well. Sorry I'm just in the mood for a joke ... Romain $ grep -w dog /usr/share/dict/words bird-dog bull-dog cat-and-dog dog dog-banner Ah - the original example didn't include hyphenated words (and nor does my /usr/share/dict/words). To match whole lines try grep -x. Does that do it? C. [[alternative HTML version deleted]] __ R-help@stat.math.ethz.ch mailing list 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.
[R] OT UNIX grep question
Dear R People: I want to use the grep command in UNIX/Linux to check some words from the dictionary. Let's say I use: grep dog /usr/share/dict/words and I get back bulldog dog dogged and so on. How could I just get back dog with the grep command please? Thanks, Sincerely Erin Hodgess Associate Professor Department of Computer and Mathematical Sciences University of Houston - Downtown mailto: [EMAIL PROTECTED] __ R-help@stat.math.ethz.ch mailing list 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.
