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From |
Robert Picard <[email protected]> |

To |
[email protected] |

Subject |
Re: st: regexm |

Date |
Sat, 27 Aug 2011 11:07:33 -0400 |

I second looking at -moss- from SSC. Try: moss svar, match("([0-9\.]+)") regex Robert On Sat, Aug 27, 2011 at 10:33 AM, Nick Cox <[email protected]> wrote: > Strings longer than 244 characters cannot be read into variables. You could > read them into Mata. > > As said, do look at -moss-. > > Nick > > On 27 Aug 2011, at 15:22, KOTa <[email protected]> wrote: > >> simplier in logistics way. i.e. i tried to do the whole thing withot >> creating additional variables (that split creates) in the middle. >> >> another question, if you know. also about strings. when i import file >> to stata (from excel, for example) i have some very long strings, that >> stata cuts to 244 chars. >> >> is there any trick to go around it? except making them shorter before >> importing :) >> >> thank you >> >> 2011/8/27 Nick Cox <[email protected]>: >>> >>> Better in what sense? Quicker to get a solution? Simpler? Other criteria? >>> >>> I don't know a way of counting more than 9 matches directly. I think >>> you would need, if you continue to follow that path, to loop over a >>> string repeatedly finding new instances and counting. >>> >>> See also -moss- from SSC. >>> >>> Nick >>> >>> On Sat, Aug 27, 2011 at 2:52 PM, KOTa <[email protected]> wrote: >>>> >>>> yes, i do work now with split, just thought with regex it will be >>>> better. >>>> >>>> anyway, is there a way to find out how many expressions regexm finds? >>>> 1. what i mean is i can access the 1st 2nd etc up to 9 with regexs, >>>> but if i dont know how many there are -> i dont know which one is >>>> last. >>>> 2. what if more the 9 expressions found? according to manual regexs >>>> only can have 0-9 parameters. >>>> >>>> >>>> thanks >>>> >>>> 2011/8/27 Nick Cox <[email protected]>: >>>>> >>>>> Well, you did say "it always ends by "% th_aft". >>>>> >>>>> I will continue as I started. >>>>> >>>>> If you first blank out stuff you don't need then you can just use >>>>> -split- to separate out elements. If you parse on spaces then it is >>>>> immaterial when you have 2 or 3 digits before, you retrieve the number >>>>> either way. >>>>> >>>>> No need for regex demonstrated. >>>>> >>>>> Nick >>>>> >>>>> On Sat, Aug 27, 2011 at 2:16 PM, KOTa <[email protected]> wrote: >>>>>> >>>>>> thanks Eric, Nick I used your advices and almost finished. >>>>>> >>>>>> but encountered one small problems on the way. >>>>>> >>>>>> i have the same type of string - "0.15%-$1(B) 0.14%-$2(B) 0.12%-$2(B) >>>>>> 0.10% th_aft." - number of digits after the dot can be 2 or 3, it's >>>>>> not constant >>>>>> >>>>>> and i am trying to extract the last % (i.e.0.10% in this case) using >>>>>> "$" like this: >>>>>> >>>>>> g example = regexs(0) if regexm( fee_str, "[0-9]+\.[0-9]*[%]$") or g >>>>>> example = regexs(0) if regexm( fee_str, "[0-9]+\.[0-9]*[%]+$") and it >>>>>> fails in both cases. >>>>>> >>>>>> the result is empty >>>>>> >>>>>> it does extract the first one (0.15%) if i dont use "$" >>>>>> >>>>>> what is wrong? >>>>>> >>>>>> thanks >>>>>> >>>>>> p.s. Nick, th_aft is not a terminator, its not always there >>>>>> >>>>>> >>>>>> 2011/8/27 Nick Cox <[email protected]>: >>>>>>> >>>>>>> It is not obvious to me that you need -regexm()- at all. >>>>>>> >>>>>>> The text " th_aft" appears to be just a terminator that you don't >>>>>>> care >>>>>>> about, so remove it. >>>>>>> >>>>>>> replace j = subinstr(j, " th_aft", "", .) >>>>>>> >>>>>>> The last element can be separated off and then removed. >>>>>>> >>>>>>> gen last = word(j, -1) >>>>>>> >>>>>>> replace j = reverse(j) >>>>>>> replace j = subinstr(j, word(j,1) , "", 1) >>>>>>> replace j = reverse(j) >>>>>>> >>>>>>> We reverse it in order to avoid removing any identical substring. >>>>>>> >>>>>>> Those three lines could be telescoped into one. >>>>>>> >>>>>>> Then it looks like an exercise in -subinstr()- and -split-. >>>>>>> >>>>>>> Nick >>>>>>> >>>>>>> On Sat, Aug 27, 2011 at 2:28 AM, Eric Booth <[email protected]> >>>>>>> wrote: >>>>>>>> >>>>>>>> <> >>>>>>>> >>>>>>>> Here's an example...note that I messed with the formatting of the >>>>>>>> %'s and $'s in my example data a bit to show how flexible the -regex- is in >>>>>>>> the latter part of the code; however, you'll need to check that there aren't >>>>>>>> other patterns/symbols in your string that could break my code. >>>>>>>> There are other ways to approach this, but I think the logic here >>>>>>>> is easy to follow: >>>>>>>> >>>>>>>> *************! watch for wrapping: >>>>>>>> >>>>>>>> **example data: >>>>>>>> clear >>>>>>>> inp str70(j) >>>>>>>> "A: 0.35%-$197(M) 0.30%-$397(M) 0.27% th_aft." >>>>>>>> "A: 0.25%-$198(M) 0.12%-$398(M) 0.99%-$300(M) 0.00% th_aft." >>>>>>>> "A: 1.0%-$109(M) 0.1% th_aft." >>>>>>>> "A: 0%-$199(M) 0.30%-$366(M) 1.99% th_aft." >>>>>>>> end >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> **regexm example == easier to use -split- initially >>>>>>>> g example = regexs(0) /// >>>>>>>> if regexm(j, "(([0-9]+\.[0-9]*[%-]+)([\$][0-9]*))") >>>>>>>> l >>>>>>>> drop example >>>>>>>> >>>>>>>> >>>>>>>> **split: >>>>>>>> replace j = subinstr(j, "A: ", "", 1) >>>>>>>> split j, p("(M) ") >>>>>>>> >>>>>>>> **first, find x10 : >>>>>>>> g x10 = "" >>>>>>>> >>>>>>>> tempvar flag >>>>>>>> g `flag' = "" >>>>>>>> foreach var of varlist j? { >>>>>>>> replace `flag' = "`var'" if /// >>>>>>>> strpos(`var', "th_aft")>0 >>>>>>>> replace x10 = subinstr(`var', "th_aft.", "", .) /// >>>>>>>> if `flag' == "`var'" >>>>>>>> replace `var' = "" if strpos(`var', "th_aft")>0 >>>>>>>> } >>>>>>>> >>>>>>>> >>>>>>>> **now, create x1-x9 and y1-y9 >>>>>>>> forval num = 1/9 { >>>>>>>> g x`num' = "" >>>>>>>> g y`num' = "" >>>>>>>> cap replace x`num' = regexs(0) if /// >>>>>>>> regexm(j`num', "([0-9]+\.?[0-9]*[%]+)") /// >>>>>>>> & !mi(j`num') & mi(x`num') //probably overkill >>>>>>>> cap replace y`num' = regexs(0) if /// >>>>>>>> regexm(j`num', "([\$][0-9]*\.?[0-9]*)") /// >>>>>>>> & !mi(j`num') & mi(y`num') >>>>>>>> } >>>>>>>> **finally, create y10 == y2: >>>>>>>> g y10 = y2 >>>>>>>> >>>>>>>> >>>>>>>> ****list: >>>>>>>> l *1 >>>>>>>> l *2 >>>>>>>> l *3 >>>>>>>> >>>>>>>> *************! >>>>>>>> - Eric >>>>>>>> >>>>>>>> On Aug 26, 2011, at 6:59 PM, KOTa wrote: >>>>>>> >>>>>>>>> I am trying to extract some data from text variable and being new >>>>>>>>> to >>>>>>>>> stata programming struggling with finding right format. >>>>>>>>> >>>>>>>>> my problem is as following: >>>>>>>>> >>>>>>>>> for example i have string variable as following: "A: 0.35%-$100(M) >>>>>>>>> 0.30%-$300(M) 0.27% th_aft." >>>>>>>>> >>>>>>>>> number of pairs "% - (M)" can be from 1 to 9 and it always ends by >>>>>>>>> "% th_aft" >>>>>>>>> >>>>>>>>> I have 10 pairs of variables X1 Y1 .... X10 Y10 >>>>>>>>> >>>>>>>>> my goal is to extract all pairs from the string variable and split >>>>>>>>> them into my separate variables. >>>>>>>>> >>>>>>>>> in this case the result should be: >>>>>>>>> >>>>>>>>> X1 = 0.35% >>>>>>>>> Y1 = $100 >>>>>>>>> >>>>>>>>> X2 = 0.30% >>>>>>>>> Y2 = $300 >>>>>>>>> >>>>>>>>> X3-X9 = y3-Y9 = 0 >>>>>>>>> >>>>>>>>> X10 = 0.27% >>>>>>>>> Y10 = Y2 (i.e. last Y extracted from sting) >>>>>>>>> >>>>>>>>> I am trying to use regexm but unsuccessfully, Any suggestions? >>>>>>>>> >>>>>>> >>>>>>> * >>>>>>> * For searches and help try: >>>>>>> * http://www.stata.com/help.cgi?search >>>>>>> * http://www.stata.com/support/statalist/faq >>>>>>> * http://www.ats.ucla.edu/stat/stata/ >>>>>>> >>>>>> >>>>>> * >>>>>> * For searches and help try: >>>>>> * http://www.stata.com/help.cgi?search >>>>>> * http://www.stata.com/support/statalist/faq >>>>>> * http://www.ats.ucla.edu/stat/stata/ >>>>>> >>>>> >>>>> * >>>>> * For searches and help try: >>>>> * http://www.stata.com/help.cgi?search >>>>> * http://www.stata.com/support/statalist/faq >>>>> * http://www.ats.ucla.edu/stat/stata/ >>>>> >>>> >>>> * >>>> * For searches and help try: >>>> * http://www.stata.com/help.cgi?search >>>> * http://www.stata.com/support/statalist/faq >>>> * http://www.ats.ucla.edu/stat/stata/ >>>> >>> >>> * >>> * For searches and help try: >>> * http://www.stata.com/help.cgi?search >>> * http://www.stata.com/support/statalist/faq >>> * http://www.ats.ucla.edu/stat/stata/ >>> >> >> * >> * For searches and help try: >> * http://www.stata.com/help.cgi?search >> * http://www.stata.com/support/statalist/faq >> * http://www.ats.ucla.edu/stat/stata/ > > * > * For searches and help try: > * http://www.stata.com/help.cgi?search > * http://www.stata.com/support/statalist/faq > * http://www.ats.ucla.edu/stat/stata/ > * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**Follow-Ups**:**Re: st: regexm***From:*KOTa <[email protected]>

**References**:**st: regexm***From:*KOTa <[email protected]>

**Re: st: regexm***From:*Eric Booth <[email protected]>

**Re: st: regexm***From:*Nick Cox <[email protected]>

**Re: st: regexm***From:*KOTa <[email protected]>

**Re: st: regexm***From:*Nick Cox <[email protected]>

**Re: st: regexm***From:*KOTa <[email protected]>

**Re: st: regexm***From:*Nick Cox <[email protected]>

**Re: st: regexm***From:*KOTa <[email protected]>

**Re: st: regexm***From:*Nick Cox <[email protected]>

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