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Stata 9 软件更新 (下载 20060828 补丁) 
20060831
pomine.com 
Stata 9 可执行文件和 ado 文件都已更新到 20060828 的最新补丁，如您能在 Stata 中直接连接 StataCorp 的服务器，请使用 update all 命令进行自动更新。 w_w_w__._pomi__ne_.__c_om_ 如果不能在 Stata 中直接连接服务器，请参照下面的页面，进行手动更新： w_w__w.p_o_m_in__e.c_o__m_ Stata 9 可执行文件手动更新说明 Stata 9 ado 文件手动更新说明 ww__w_._pomi_ne._c__o__m_ ___20060828 补丁更新内容___ w__ww__.__p_o_mi_n_e_.co_m_ Adofiles w_w_w.p__omin_e_._c_om_ 1. Online help and the search index have been brought up to date for Stata Journal 6(3). ww__w.__p_o__m_in_e__.c_o__m 2. clogit standard errors were not correct if pweights were used without option cluster(). This problem has been fixed. w__w_w.p_om_i_n__e_._co_m_ 3. cloglog and xtcloglog reported error messages when the collinear option was specified even when constraints were specified that properly identified the model. This problem has been fixed. w_ww_.po__m__ine__._c_o__m 4. graph bar, in rare cases, produced bars based on incorrect values when a variable was repeated for a statistic and followed by another statistic and variable. This problem has been fixed. w__w__w.__p__om__i__ne.__co__m_ 5. histogram, kdensity, twoway histogram, twoway kdensity, twoway lfit, and twoway qfit produced unusable graphs when the by() option identified one or more groups that resulted in an empty graph. This problem has been fixed. w_w_w.p_o_m_i_n_e__._c_om_ 6. linktest, when run after glm, used a Stata 6 version of glm rather than the modern one. This problem has been fixed. w__w_w__._p__o_m_in__e_.c_o_m 7. ml commands using fweights with options technique(bhhh) or vce(opg) produced incorrect standard error estimates. This problem has been fixed. w__w_w._p_o_mine.__c__o_m_ 8. ml exited with an unhelpful error message when checking for convergence and the likelihood evaluator resulted in an unstable or asymmetric Hessian matrix. This problem has been fixed. www__.p_o__mi_n_e__._co__m 9. nestreg returned an error message when svy omitted strata due to zero weights or subpopulation estimation. This problem has been fixed. w_w_w__._p__om_i__ne.com__ 10. The function evaluator version of nl exited with an error if the user tried to pass any options to the function evaluator program. This problem has been fixed. www__.__p_omine__.c_o_m 11. nlogit's robust standarderror calculation failed to take into account the withinchoiceset correlation inherent to nlogit models. This problem has been fixed. w_w_w.p_o_m_i_ne_.c_om__ 12. pcamat, factormat, corr2data, and drawnorm now allow singular correlation (or covariance) structures. pcamat, factormat, corr2data, and drawnorm have new option forcepsd that maps a matrix intended to be correlations (covariances) into a positivesemidefinite singular correlation (covariance) matrix. ww_w_._p__o_min__e_._c_o_m_ 13. ranksum now allows by() to contain a string variable. w_ww_._p_o__mi_n_e_._c_o_m_ 14. _rmdcoll's nocollin option has been renamed to normcoll. The nocollin option will continue to work as a synonym for normcoll but will become undocumented. www__.__p_o_mi_ne.__com__ 15. stepwise dropped variables collinear with the constant even when the noconstant option was specified in the prefixed command. This problem has been fixed. www.p__o_m_in__e.__c__o_m 16. svy jackknife sometimes reported the number of subpopulation observations and subpopulation size even when the subpop() option was not specified. This problem has been fixed. w_w_w__.__po_m_in__e._com_ 17. table's format() option was not applied to the frequency column when the frequency was greater than nine digits. This problem has been fixed. w_w_w_.__po_m_in_e_._c__o_m_ 18. testnl with an expression that included a comma produced an error message. Expressions that are bound in parentheses now allow commas. For example, testnl _b[x]=M[1,3] is still not allowed, whereas testnl (_b[x]=M[1,3]) is now allowed. ww_w_._p__om_i__ne_._c__om_ 19. tsset and xtset now indicate whether the panels are balanced. w__w_w.p_o_m_i_n__e_._c_om_ Stata executable, all platforms w__ww._po_m_i_ne_.__co_m 20. asmprobit sometimes incorrectly marked the estimation sample when invalid observations were dropped. This problem has been fixed. w_w__w__._po__mi__n_e_._c__o_m 21. graph twoway plot types pcarrow, pcbarrow, and pcarrowi may now be drawn on plot regions with log scales or reversed scales. w_ww_._p__o_m__in_e__._com_ 22. Once logit, logistic, or probit reported an error 902 (no room to add more variables due to width), the error would continue being reported on subsequent attempts even after the memory had been set to a value large enough to perform the estimation. This problem has been fixed. www_.p_o_m_i_ne__._c__om 23. Mata function findexternal() is updated to allow returning pointers to functions as well as matrices, vectors, and scalars. ww_w_.__p_o_m__i_n_e_._c__om__ 24. svy brr, svy jackknife, svy: mean, svy: proportion, svy: ratio, and svy: total did not omit strata for which every observation contained a zero sampling weight. This problem has been fixed. w_w_w._p__o_min_e_._c__o__m__ Stata executable, Windows and Macintosh w_w__w_.p_o_m_in__e._c__o__m_ 25. When Stata checked if an update was available from Stata's web site but no updating was performed, it displayed a note that an update was available after Stata was launched. In rare cases, Stata's update status was not synchronized with Stata's web site. This problem has been fixed. 


