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 版块 作者 回复/查看 最后发表
【急求助】做var和adf总是no observations怎么办 Stata专版 byhuhu1993 2016-5-22 0 2063 byhuhu1993 2016-5-22 16:07:10
stata中Lp半参数估计tfp'时总是显示no observations r（2000） Stata专版 LetsDance 2016-5-20 1 1998 LetsDance 2016-5-20 17:29:36
R语言，数据框，删除两行后，observations变少，str结果未变 attach_img R语言论坛 Chamy2012 2016-5-11 3 2699 liuzhe12 2016-5-13 15:25:53
悬赏 Rendezvous of the Poisson and Exponential Distributions at the World Cup of Socc - [!reward_solved!] attachment 求助成功区 dliangfranklin 2016-5-12 1 667 giresse 2016-5-12 14:54:03
悬赏 REFLECTIONS ON THE 2015 DECADE - [!reward_solved!] attachment 求助成功区 ericford 2016-5-9 2 1100 ericford 2016-5-9 20:54:41
Theory of Social Situations是什么理论？ 博弈论 lg21c 2016-5-5 2 1835 kwamebruce 2016-5-8 15:52:05
the wealth of nations (1776) attachment 新手入门区 云梦泽771 2016-5-7 2 1882 offerlover 2016-5-7 13:12:15
悬赏 求助Associations Between Spondyloarthritis - [!reward_solved!] attachment 求助成功区 刀剑林 2016-5-4 2 694 evergreen5893 2016-5-4 22:22:25
悬赏 Foundations of technometrics - [!reward_solved!] attachment 求助成功区 fancymarshal 2016-4-28 1 963 umlijing 2016-4-28 21:37:27
Woof: Why Ordinary Organizations Fail attach_img 金融学（理论版） cheeko 2016-4-26 4 1727 newever 2016-4-27 16:40:48
Data Mining Applications with R读书心得 R语言论坛 isunzhaowei 2016-3-18 4 1480 太极无极 2016-4-25 23:57:40
悬赏 求助众筹英文文献有网址：文献名：Three provocations for civic crowdfunding - [!reward_solved!] attachment 求助成功区 Anna5 2016-4-18 2 1046 Anna5 2016-4-18 12:06:48
The University of Twente is announcing 2 PhD positions 院校申请 shaoqinglong11 2016-4-8 0 1191 shaoqinglong11 2016-4-8 23:59:13
进行面板数据回归时一直出现no obersevations, 请问是数据还是编程的问题？如何解决？ attachment Stata专版 十米波 2016-4-3 6 3671 夏目贵志 2016-4-3 23:29:13
MIT.Foundations of ML attachment 数据分析师（CDA）专版 oldgreece 2016-3-21 1 1984 cometwx 2016-3-28 10:41:09
悬赏 求论文下载一篇Optimal Ring Size at First-Price Auctions - [!reward_solved!] attachment 求助成功区 skal 2016-3-26 6 820 giresse 2016-3-27 19:36:21
Foundations of Data Science1 attachment 数据分析与数据挖掘 oldgreece 2016-3-23 2 1328 jjxm20060807 2016-3-23 20:14:15
The MoFo Guide to US Privatizations中概股/美股私有化实务指南 attachment 金融实务版 ryanchill 2016-3-20 0 1231 ryanchill 2016-3-20 12:14:10
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