Re: Re: [SPAM] Re: st: sum the variable based on other variables

[Nick Cox <njcoxstata@gmail.com>]

It worked for me. Make sure all the code is in one place, e.g. the
do-file editor.
Nick
njcoxstata@gmail.com


On 25 March 2014 11:19, wanhaiyou <wanhaiyou@hnu.edu.cn> wrote:
> Hi,Nick
> Thanks very much for your suggestion.
> However,the following codes are not work well on my computer
>
> clear
> input v1 v2 v3
> 1 1 0
> 0 0 1
> 1 0 1
> 1 1 1
> 0 1 0
> 1 1 1
> end
>
> tempname handle
>
> postfile `handle' str32 which1 str32 which2 mean using myresults, replace
>
> . forv i=1/3 {
>   2.   forv j=1/3 {
>   3.   if `i'~=`j' {
>   4.     sum  v`i' if v`i' == v`j', meanonly
>   5.     post `handle' ("v`i'") ("v`j'") (`r(mean)')
>   6.
> . }
>   7. }
>   8. }
> ( invalid name
> r(198);
>
> I have looked at the help for postfile,but I cannot find the reason.
> How to fix this error?
>
> Many thanks for your help again
>
> Bests,
> wanhaiyou
> Hunan University
>
>> -----原始邮件-----
>> 发件人: "Nick Cox" <njcoxstata@gmail.com>
>> 发送时间: 2014-03-25 18:28:56 (星期二)
>> 收件人: "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
>> 抄送:
>> 主题: Re: [SPAM] Re: st: sum the variable based on other variables
>>
>> Look at the help for -postfile-.
>>
>> Something like
>>
>> clear
>> input v1 v2 v3
>> 1 1 0
>> 0 0 1
>> 1 0 1
>> 1 1 1
>> 0 1 0
>> 1 1 1
>> end
>>
>> tempname handle
>>
>> postfile `handle' str32 which1 str32 which2 mean using myresults, replace
>>
>> forv i=1/3 {
>>   forv j=1/3 {
>>   if `i'~=`j' {
>>     sum  v`i' if v`i' == v`j', meanonly
>>     post `handle' ("v`i'") ("v`j'") (`r(mean)')
>>
>> }
>> }
>> }
>>
>> postclose `handle'
>>
>> use myresults, clear
>>
>> Nick
>> njcoxstata@gmail.com
>>
>>
>> On 25 March 2014 09:58, wanhaiyou <wanhaiyou@hnu.edu.cn> wrote:
>> > Nick,thanks very much.
>> > In fact, I only need the mean.
>> > I attemp to save these value as a matrix.However,when the number of variable large,e.g.,100,
>> > the method is unfeasible.
>> > The following codes
>> > **
>> > clear
>> > input v1 v2 v3
>> > 1 1 0
>> > 0 0 1
>> > 1 0 1
>> > 1 1 1
>> > 0 1 0
>> > 1 1 1
>> > end
>> >
>> > forv i=1/3 {
>> >   forv j=1/3 {
>> >   if `i'~=`j' {
>> >     sum  c`i' if c`i'==c`j', meanonly
>> >         mat b=(nullmat(b)\r(mean))
>> > }
>> > }
>> > }
>> >
>> > How could I save those value (r(mean) from "sum"
>> > as a column?
>> >
>> >
>> > Bests,
>> > wanhaiyou
>> > Hunan University
>> >
>> >
>> >> -----原始邮件-----
>> >> 发件人: "Nick Cox" <njcoxstata@gmail.com>
>> >> 发送时间: 2014-03-25 17:01:06 (星期二)
>> >> 收件人: "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
>> >> 抄送:
>> >> 主题: [SPAM] Re: st: sum the variable based on other variables
>> >>
>> >> You are using -egen- to create variables, each of which just holds a
>> >> constant. That is not necessary. The sum is left in memory as r(sum)
>> >> after -summarize-.
>> >>
>> >> I don't know what you want to do with your millions of sums, so this
>> >> code is only a start.
>> >>
>> >> forv i=1/3 {
>> >>   forv j=1/3 {
>> >>   if `i'~=`j' {
>> >>     sum  v`i' if v`i'==v`j', meanonly
>> >>     di r(sum)
>> >> }
>> >> }
>> >> }
>> >>
>> >> Nick
>> >> njcoxstata@gmail.com
>> >>
>> >> On 25 March 2014 04:19, wanhaiyou <wanhaiyou@hnu.edu.cn> wrote:
>> >>
>> >> > I want to creat the sum of one variable based on other variables.For example,
>> >> > I have the following dataset
>> >> > v1 v2 v3
>> >> > 1 1 0
>> >> > 0 0 1
>> >> > 1 0 1
>> >> > 1 1 1
>> >> > 0 1 1
>> >> > 0 1 0
>> >> >
>> >> > If v1=v2, then sum the corresponding value of v1
>> >> > v1 v2
>> >> > 1 1   equal
>> >> > 0 0   equal
>> >> > 1 0   not equal
>> >> > 1 1   equal
>> >> > 0 1   not equal
>> >> > 0 1   not equal
>> >> > if v1=v3, then sum the corresponding value of v1
>> >> > ....
>> >> >
>> >> > if v3==v1,then sum the corresponding value of v3
>> >> > if v3=v2,then sum the corresponging value of v3
>> >> >
>> >> > I have written the following codes
>> >> >
>> >> > forv i=1/3 {
>> >> >   forv j=1/3 {
>> >> >   if `i'~=`j' {
>> >> >   egen vsum`i'`j'=total(v`i') if v`i'==v`j'
>> >> > }
>> >> > }
>> >> > }
>> >> >
>> >> > However, I have 5000 variables but the max number of variables is 32,767.
>> >> > Therefore, this codes cannot be used.
>> >> *
>> >> *   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/
>> >
>> >
>> > --
>> > Bests,
>> >
>> > wanhaiyou
>> >
>> > Hunan University
>> >
>> >
>> > *
>> > *   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/
>
>
> --
> Bests,
>
> wanhaiyou
>
> Hunan University
>
>
> *
> *   For searches and help try:
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> *   http://www.stata.com/support/faqs/resources/statalist-faq/
> *   http://www.ats.ucla.edu/stat/stata/

*
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