Wednesday, March 15, 2006

Re: st: Re: summing up digits and comparing to a check digit

thanks a lot - I actually used Michael's code with the amendment you suggest - very useful indeed! Thanks to all Lia

Austin Nichols wrote:

>I agree wholeheartedly with Michael Blasnik's opening caveat--was your >example 12050457 => 0+5+0+4+5+7=21/10=2+1 => check digit=1 supposed to >be 1050457 => 0+5+0+4+5+7=21/10=2+1 => check digit=1 by any chance? > >As for his solution, it works well except when digits may be fewer >than 6 digits when turned into strings--I would replace his second >line with > replace x=substr("0000000",1,7-length(x))+x >to pad numbers out to y digits with leading zeros, and then add another line > assert length(x)==7 >to make sure there are no odd cases. > >. li m x c, noo clean > > myvar x check > 105059 0105059 0 > 2459 0002459 0 > 7102059 7102059 7 > >On 3/15/06, Michael Blasnik <michael.blasnik@verizon.net> wrote: > > >>I'm not sure I understand the problem -- one of your examples is an 8 digit >>number but you say you have 7 digit numbers. Anyway, here is some "highly >>advanced programming" (?) : >> >>gen x=string(myvar) >>replace x="0"+x if length(x)==6 >>gen >>check=mod(real(substr(x,2,1))+real(substr(x,3,1))+real(substr(x,4,1))+real(substr(x,5,1))+real(substr(x,6,1))+real(substr(x,7,1)),10) >> >>make sure to remove any line break that the email puts in the last line. >> >> > >* >* For searches and help try: >* http://www.stata.com/support/faqs/res/findit.html >* http://www.stata.com/support/statalist/faq >* http://www.ats.ucla.edu/stat/stata/ > > >

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