浪漫夜晚
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请问一下大家:关于Stata中有关tsset的问题

以下是我在stata里面编辑时间序列,进行tsset的结果。
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
. clear

. edit
(3 vars, 783 obs pasted into editor)

. encode date, generate(mydate)

. format mydate %tw

. describe

Contains data
 obs:           783                          
vars:             4                          
size:        18,009 (98.3% of memory free)
-------------------------------------------------------------------------------
             storage  display     value
variable name   type   format      label      variable label
-------------------------------------------------------------------------------
date            str11  %11s                   Date
hi1index        int    %8.0g                  HI1 Index
hsiindex        int    %8.0g                  HSI Index
mydate          long   %tw         mydate     Date
-------------------------------------------------------------------------------
Sorted by:  
    Note:  dataset has changed since last saved

. tsset mydate
       time variable:  mydate, 1960w2 to 1975w4

. tsset hsiindex
repeated time values in sample
r(451);

. tsset hi1index
repeated time values in sample
r(451);

. roblpr hsiindex hi1index
time variable not set, use -tsset varname ...-
r(111);
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
问题是对日期进行tsset应该算是完成了,但是为什么tsset hsiindex和tsset hi1index的时候还是会出现错误提示?
望高手指教,急……………………………………………………………………
先谢过了

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