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

[wanhaiyou <wanhaiyou@hnu.edu.cn>]

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:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/faqs/resources/statalist-faq/
*   http://www.ats.ucla.edu/stat/stata/