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st: RE: RE: rearrange table


From   Nick Cox <n.j.cox@durham.ac.uk>
To   "'statalist@hsphsun2.harvard.edu'" <statalist@hsphsun2.harvard.edu>
Subject   st: RE: RE: rearrange table
Date   Fri, 10 Feb 2012 12:06:51 +0000

sysuse auto, clear 
statsby N=r(N) se=r(se) mean=r(mean) ub=r(ub) lb=r(lb), by(foreign) : ci mpg
gen sd = se * sqrt(N) 
drop se N 
rename (sd mean lb  ub) (statsd statmean statlb statub)
reshape long stat, i(foreign) string
label def which 1 mean 2 sd 3 lb 4 ub 
encode _j , label(which) gen(which)
label def which 3 "95% limit: lower" 4 "upper", modify
tabdisp which foreign, c(stat) format(%3.2f)

Nick 
n.j.cox@durham.ac.uk 

Nick Cox

In terms of -table-, the answers are

1. I don't think you can do this. 

2. -table- has its own option -format()-: see the help. 

3. I don't think you can do this. 

In terms of strategy, just as in another thread: reduce your data to a dataset of results -- some people say resultsset -- for maximum flexibility. 

Here -statsby- is very useful. 

One approach: 

. sysuse auto, clear 
(1978 Automobile Data)

. statsby mean=r(mean) ub=r(ub) lb=r(lb), by(foreign) : ci mpg
(running ci on estimation sample)

      command:  ci mpg
         mean:  r(mean)
           ub:  r(ub)
           lb:  r(lb)
           by:  foreign

Statsby groups
----+--- 1 ---+--- 2 ---+--- 3 ---+--- 4 ---+--- 5 
..

. save bystat, replace 
file bystat.dta saved

. sysuse auto, clear
(1978 Automobile Data)

. statsby sd=r(sd), by(foreign)  : su mpg
(running summarize on estimation sample)

      command:  summarize mpg
           sd:  r(sd)
           by:  foreign

Statsby groups
----+--- 1 ---+--- 2 ---+--- 3 ---+--- 4 ---+--- 5 
..

. merge 1:1 foreign using bystat 
(label origin already defined)

    Result                           # of obs.
    -----------------------------------------
    not matched                             0
    matched                                 2  (_merge==3)
    -----------------------------------------

. drop _merge

. rename (sd mean lb  ub) (statsd statmean statlb statub)

. reshape long stat, i(foreign) string
(note: j = lb mean sd ub)

Data                               wide   ->   long
-----------------------------------------------------------------------------
Number of obs.                        2   ->       8
Number of variables                   5   ->       3
j variable (4 values)                     ->   _j
xij variables:
             statlb statmean ... statub   ->   stat
-----------------------------------------------------------------------------

. label def which 1 mean 2 sd 3 lb 4 ub 

. encode _j , label(which) gen(which)

. label def which 3 "95% limit: lower" 4 "upper", modify

. tabdisp which foreign, c(stat) format(%3.2f)

-------------------------------------
                 |      Car type     
           which | Domestic   Foreign
-----------------+-------------------
            mean |    19.83     24.77
              sd |     4.74      6.61
95% limit: lower |    18.51     21.84
           upper |    21.15     27.70
-------------------------------------

Here's the code in one:

sysuse auto, clear 
statsby mean=r(mean) ub=r(ub) lb=r(lb), by(foreign) : ci mpg
save bystat, replace 
sysuse auto, clear
statsby sd=r(sd), by(foreign)  : su mpg
merge 1:1 foreign using bystat 
drop _merge
rename (sd mean lb  ub) (statsd statmean statlb statub)
reshape long stat, i(foreign) string
label def which 1 mean 2 sd 3 lb 4 ub 
encode _j , label(which) gen(which)
label def which 3 "95% limit: lower" 4 "upper", modify
tabdisp which foreign, c(stat) format(%3.2f)

On -statsby- see also 

SJ-10-1 gr0045  . . . . . . . . . . . . . Speaking Stata: The statsby strategy
        . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  N. J. Cox
        Q1/10   SJ 10(1):143--151                                (no commands)
        demonstrates the use of statsby to prepare a reduced
        dataset for subsequent graphing






Nick 
n.j.cox@durham.ac.uk 

From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Nikolaos Pandis

I am running the following commands:

. format percent %4.2f

. table title,contents(mean percent sd percent )
---------------------------------------------
         title | mean(percent)    sd(percent)
---------------+-----------------------------
No description |         57.74       3.619958
    Inadequate |         61.11       5.202971
      Adequate |         65.50       5.015084
---------------------------------------------

I would like to ask:
1. How can I place the title levels(no description, inadequate, adequate) as columns and the summary stats as rows.
2. How could I reduce to 2 the decimal points for sd.

3. Is there a way to add 95% CIs?

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