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| From | Nick Cox <njcoxstata@gmail.com> |
| To | "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu> |
| Subject | Re: st: Re: Fill Missing values at the End |
| Date | Wed, 8 Jan 2014 18:30:36 +0000 |
I really don't know what reply you expect to this. I encourage you to look at the code, see what it does and change it until it does what you want. Nick njcoxstata@gmail.com On 8 January 2014 16:40, Sadia Khalid <sadiakhalid234@gmail.com> wrote: > the code is working. > > but the thing is that > > not getting required results > > what i have > year name y > 1990 Aqueela 50.1 > 1991 Aqueela 39.9 > 1992 Aqueela 93.4 > 1993 Aqueela 53.4 > 1994 Aqueela 5.9 > 1995 Aqueela 41.6 > 1996 Aqueela > 1997 Aqueela > 1998 Aqueela > 1999 Aqueela > 2000 Aqueela > 1990 Abida 57.0 > 1991 Abida 44.3 > 1992 Abida 41.3 > 1993 Abida 92.3 > 1994 Abida 42.2 > 1995 Abida 56.0 > 1996 Abida > 1997 Abida > 1998 Abida > 1999 Abida > 2000 Abida > 1990 Zubaida 68.5 > 1991 Zubaida 51.0 > 1992 Zubaida 41.7 > 1993 Zubaida 91.5 > 1994 Zubaida 40.7 > 1995 Zubaida > 1996 Zubaida > 1997 Zubaida > 1998 Zubaida > 1999 Zubaida > 2000 Zubaida > > and what i want > > year name y > 1990 Aqueela 50.1 > 1991 Aqueela 39.9 > 1992 Aqueela 93.4 > 1993 Aqueela 53.4 > 1994 Aqueela 5.9 > 1995 Aqueela 41.6 > 1996 Aqueela 96.6 > 1997 Aqueela 113.0 > 1998 Aqueela 132.0 > 1999 Aqueela 154.4 > 2000 Aqueela 180.4 > 1990 Abida 57.0 > 1991 Abida 44.3 > 1992 Abida 41.3 > 1993 Abida 92.3 > 1994 Abida 42.2 > 1995 Abida 82.7 > 1996 Abida 96.6 > 1997 Abida 113.0 > 1998 Abida 132.0 > 1999 Abida 154.4 > 2000 Abida 180.4 > 1990 Zubaida 68.5 > 1991 Zubaida 51.0 > 1992 Zubaida 41.7 > 1993 Zubaida 91.5 > 1994 Zubaida 40.7 > 1995 Zubaida > 1996 Zubaida > 1997 Zubaida > 1998 Zubaida > 1999 Zubaida > 2000 Zubaida > > Regards > Sadia Khalid > > > On 8 January 2014 21:16, Nick Cox <njcoxstata@gmail.com> wrote: >> Sorry if I seem hard on you, but >> >> 1. If you are unclear the first time, almost the same question is >> unlikely to be any clearer. >> >> 2. "not getting the required results" is completely opaque as an error report. >> >> >> >> Nick >> njcoxstata@gmail.com >> >> >> On 8 January 2014 16:10, Sadia Khalid <sadiakhalid234@gmail.com> wrote: >>> Thanks >>> >>> Nick Cox. >>> I have posted the almost same thing becuase of the fear that i have >>> not explained the question welll in the first posts. sorrry for this. >>> i have applied the code but not getting the required results. >>> Regards >>> Sadia Khaild >>> >>> On 8 January 2014 20:37, Nick Cox <njcoxstata@gmail.com> wrote: >>>> This appears to be the third posting of this question. (In fact, as I >>>> wrote this, yet another posting appeared.) >>>> >>>> Please see the Statalist FAQ at >>>> >>>> http://www.stata.com/support/faqs/resources/statalist-faq/#noanswer >>>> >>>> to see that is one more than allowed. >>>> >>>> You also sent me personal mail. >>>> >>>> Again, not to do that is explained in the FAQ >>>> >>>> http://www.stata.com/support/faqs/resources/statalist-faq/#private >>>> >>>> Repeating a question (or minor variants of it) again and again is >>>> _not_ likely to get more attention for your question than you would >>>> otherwise get. In fact, it draws attention to yourself as someone who >>>> (apparently) didn't read the FAQ carefully and/or doesn't respect the >>>> list. No one is obliged to answer anything on Statalist. If you want a >>>> tame consultant, hire one and pay accordingly. >>>> >>>> In this case David Ashcraft posted a suggestion >>>> >>>> http://www.stata.com/statalist/archive/2014-01/msg00206.html >>>> >>>> to which you replied >>>> >>>> http://www.stata.com/statalist/archive/2014-01/msg00207.html >>>> >>>> I don't understand the reply, but I don't think it explained why >>>> David's suggestion didn't work. >>>> >>>> In any case, your recipe is to use the last known value and the value >>>> 4 years before that and extrapolate forward, or to use the first known >>>> value and the value 4 years after that and extrapolate backward. You >>>> don't need new code to do that. It is an application of -ipolate-. >>>> >>>> 1. Clone your variable. >>>> >>>> 2. Replace the 4th, 3rd, 2nd last known values with missing. >>>> >>>> 3. Replace the 2nd, 3rd, 4th known values with missing. >>>> >>>> 4. Use -ipolate-. >>>> >>>> gen y2 = y >>>> gen ismissing = missing(y) >>>> bysort ismissing name (year) : replace y2 = . if inlist(_n, 2, 3, 4, >>>> _N-3, _N-2, _N-1) >>>> drop ismissing >>>> bysort name (year): ipolate y2 year, gen(y3) epolate >>>> >>>> You want to use >>>> >>>> gen y_new = cond(missing(y), y3, y) >>>> >>>> I addressed the restriction only to apply when there are 5 or fewer >>>> values missing in an earlier reply, so I won't repeat that here. >>>> >>>> http://www.stata.com/statalist/archive/2014-01/msg00187.html >>>> >>>> Nick >>>> njcoxstata@gmail.com >>>> >>>> >>>> On 8 January 2014 15:05, Sadia Khalid <sadiakhalid234@gmail.com> wrote: >>>> >>>>> I have working on Panel data. For some of the individuals end values >>>>> are missing. I have to fill these values by first calculating the >>>>> growth of the known five values. >>>>> >>>>> Like for the individual Aqueela values for the year 1996 – 2000 are >>>>> missing. I will first calculate the growth rate of values from >>>>> 1991-1995. the formula for calculating the growth rate is >>>>> =((41.6/39.9)^(1/(5-1))-1). The growth rate is 1.05%. >>>>> now the value in 1996 = value in 1995*(1+growth rate). >>>>> >>>>> And value in 1997= value in 1996 * (1+growth rate). >>>>> >>>>> And so on. >>>>> >>>>> For the second individual starting values are missing from 1996-2000 >>>>> First I will have to find the r=growth rate of values from 1991-1995. >>>>> Than the value in 1996 =value in 1995*(1+ growth rate) and >>>>> value in 1997 =value in 1996/(1+ growth rate) and so on. >>>>> >>>>> >>>>> for the last indiviual values are missing from 1995-2000 >>>>> if for any indiviual more than 5 values are missing do not fill that. >>>>> any code for this >>>>> >>>>> what i have >>>>> >>>>> what i have >>>>> year name y >>>>> 1990 Aqueela 50.1 >>>>> 1991 Aqueela 39.9 >>>>> 1992 Aqueela 93.4 >>>>> 1993 Aqueela 53.4 >>>>> 1994 Aqueela 5.9 >>>>> 1995 Aqueela 41.6 >>>>> 1996 Aqueela >>>>> 1997 Aqueela >>>>> 1998 Aqueela >>>>> 1999 Aqueela >>>>> 2000 Aqueela >>>>> 1990 Abida 57.0 >>>>> 1991 Abida 44.3 >>>>> 1992 Abida 41.3 >>>>> 1993 Abida 92.3 >>>>> 1994 Abida 42.2 >>>>> 1995 Abida 56.0 >>>>> 1996 Abida >>>>> 1997 Abida >>>>> 1998 Abida >>>>> 1999 Abida >>>>> 2000 Abida >>>>> 1990 Zubaida 68.5 >>>>> 1991 Zubaida 51.0 >>>>> 1992 Zubaida 41.7 >>>>> 1993 Zubaida 91.5 >>>>> 1994 Zubaida 40.7 >>>>> 1995 Zubaida >>>>> 1996 Zubaida >>>>> 1997 Zubaida >>>>> 1998 Zubaida >>>>> 1999 Zubaida >>>>> 2000 Zubaida >>>>> >>>>> and what i want >>>>> >>>>> year name y >>>>> 1990 Aqueela 50.1 >>>>> 1991 Aqueela 39.9 >>>>> 1992 Aqueela 93.4 >>>>> 1993 Aqueela 53.4 >>>>> 1994 Aqueela 5.9 >>>>> 1995 Aqueela 41.6 >>>>> 1996 Aqueela 96.6 >>>>> 1997 Aqueela 113.0 >>>>> 1998 Aqueela 132.0 >>>>> 1999 Aqueela 154.4 >>>>> 2000 Aqueela 180.4 >>>>> 1990 Abida 57.0 >>>>> 1991 Abida 44.3 >>>>> 1992 Abida 41.3 >>>>> 1993 Abida 92.3 >>>>> 1994 Abida 42.2 >>>>> 1995 Abida 82.7 >>>>> 1996 Abida 96.6 >>>>> 1997 Abida 113.0 >>>>> 1998 Abida 132.0 >>>>> 1999 Abida 154.4 >>>>> 2000 Abida 180.4 >>>>> 1990 Zubaida 68.5 >>>>> 1991 Zubaida 51.0 >>>>> 1992 Zubaida 41.7 >>>>> 1993 Zubaida 91.5 >>>>> 1994 Zubaida 40.7 >>>>> 1995 Zubaida >>>>> 1996 Zubaida >>>>> 1997 Zubaida >>>>> 1998 Zubaida >>>>> 1999 Zubaida >>>>> 2000 Zubaida >>>>> >>>> >>>> * >>>> * For searches and help try: >>>> * http://www.stata.com/help.cgi?search >>>> * http://www.stata.com/support/faqs/resources/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/faqs/resources/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/faqs/resources/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/faqs/resources/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/faqs/resources/statalist-faq/ * http://www.ats.ucla.edu/stat/stata/