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st: bar graph problem


From   "Tunga Kantarci" <tungakantarci@hotmail.com>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: bar graph problem
Date   Wed, 30 Apr 2008 15:31:32 +0200

Hello,


I use the following command to generate a categorized bar graph:

graph bar (asis) q41a if grandom == 1, over(frandom_)

However, I receive the following message:

variables frandom_ _variables do not uniquely identify the observations

I donít understand why my "frandom_" variable need to identify the
observations uniquely.
(by the way I have an "id" variable which uniquely identifies observations)
I also do not understand what "_variables" refers to.

If I run the command without "asis" then I get the following:

graph bar q41a if grandom == 1, over(frandom_) variable __000006 not found
in using data




In particular, what I am trying to do is this: see the three tabulations
below. What I want is a categorized bar graph, where the categorization is
over frandom. That is, three bars in a bunch will present together "Plan van
name5", where each bar refers to one of the "frandom"s. There will be three
bunches with each bunch having three bars. But unfortunately, I receive the
message I mentioned.  
†


 tab q41a if grandom == 1 & frandom == 1
             q4 age |
randomisation 1 3/4 |      Freq.     Percent        Cum.
--------------------+-----------------------------------
plan van ^name5 |         21       42.00       42.00
plan van ^name6 |         14       28.00       70.00
plan van ^name7 |         15       30.00      100.00
--------------------+-----------------------------------
              Total |         50      100.00
†


 tab q41a if grandom == 1 & frandom == 2
             q4 age |
randomisation 1 3/4 |      Freq.     Percent        Cum.
--------------------+-----------------------------------
plan van ^name5 |         32       61.54       61.54
plan van ^name6 |         10       19.23       80.77
plan van ^name7 |         10       19.23      100.00
--------------------+-----------------------------------
              Total |         52      100.00
†


 tab q41a if grandom == 1 & frandom == 3
             q4 age |
randomisation 1 3/4 |      Freq.     Percent        Cum.
--------------------+-----------------------------------
plan van ^name5 |         23       58.97       58.97
plan van ^name6 |          4       10.26       69.23
plan van ^name7 |         12       30.77      100.00
--------------------+-----------------------------------
              Total |         39      100.00










tab frandom

         q4 |
 (standard) |
       item |
randomizati |
         on |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        627       34.19       34.19
          2 |        600       32.72       66.90
          3 |        607       33.10      100.00
------------+-----------------------------------
      Total |      1,834      100.00


tab grandom

         q4 |
 (standard) |
       item |
randomizati |
 on pension |
     income |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        465       25.35       25.35
          2 |        478       26.06       51.42
          3 |        452       24.65       76.06
          4 |        439       23.94      100.00
------------+-----------------------------------
      Total |      1,834      100.00



 tab q41a

             q4 age |
randomisation 1 3/4 |      Freq.     Percent        Cum.
--------------------+-----------------------------------
Plan from ^name5 |        220       52.26       52.26
Plan from ^name6 |         53       12.59       64.85
Plan from ^name7 |        148       35.15      100.00
--------------------+-----------------------------------
              Total |        421      100.00



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