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From |
Nick Cox <njcoxstata@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: RE: how to store the statistics calculated in a loop as a table? |

Date |
Thu, 8 Dec 2011 10:09:07 +0000 |

In addition to Kit's example, please study this: sysuse auto, clear collapse (sum) w_sum = weight (sum) w_length = length, by(foreign rep78) gen ratio = w_sum / w_length tabdisp rep78 foreign, cell(w_sum w_length ratio) There are no loops! Nick On Thu, Dec 8, 2011 at 2:48 AM, Christopher Baum <kit.baum@bc.edu> wrote: > I just tried the collapse, it is really handy, it is amazing how stata > create so powerful commend. I guess my old way of programming in VB is > very narrow and restricted. > > But I still wanted to know if there is anyway that I could store the > results I calculated in the loop as a table? Do I need to use matrix > related commend? > > The following is the code: > > forvalues i=1990 (1)2010 { > forvalues n=1(1)6{ > > quietly sum EI_t if > trade_date_yearformat==`i' &FF_group_rank_0==`n' > local s_EI=r(sum) > quietly sum BE_t_1 if > trade_date_yearformat==`i' &FF_group_rank_0==`n' > local s_BE=r(sum) > local mean_EI_BE=`s_EI'/`s_BE' > > } > } > > > How do I make stata to memorize the mean_EI_BE value that is > calculated after each loop , and at then end report all the mean_EI_BE > as a seperate table? > > > ------------------------------- > webuse grunfeld, clear > egen quinq = cut(year), group(4) label > egen quincomp = group(quinq company), label > // quinq are time periods (quinquennia), company are units in this panel > tabstat invest kstock, by(quincomp) save > mata: > m = J(0,2,0) > for(i=1; i<=40; i++) { > m = m \ st_matrix("r(Stat"+strofreal(i)+")") > } > m = m , m[. , 1] :/ m[. , 2] > st_matrix("Result", m) > end > mat li Result > --------------------------------- > You can add the row labels (which are also saved by tabstat) if you wish. > * * 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/

**References**:**Re: st: RE: how to store the statistics calculated in a loop as a table?***From:*Christopher Baum <kit.baum@bc.edu>

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