Generating the Interquartile Range with Stata Commands

[Scott Ray]

In Stata/SE 17.0 is there a way to generate the Interquartile Range from a set of data using a single command? Else is there a method of using strung commands to generate this statistic?

[Andrew Musau]

help egen

and see the -iqr()- function.

[Scott Ray]

Thank you.

[Nick Cox]

See also

. sysuse auto, clear
(1978 automobile data)


. tabstat price-gear_ratio, s(n  p25 p50 p75 iqr) c(s)

    Variable |         N       p25       p50       p75       IQR
-------------+--------------------------------------------------
       price |        74      4195    5006.5      6342      2147
         mpg |        74        18        20        25         7
       rep78 |        69         3         3         4         1
    headroom |        74       2.5         3       3.5         1
       trunk |        74        10        14        17         7
      weight |        74      2240      3190      3600      1360
      length |        74       170     192.5       204        34
        turn |        74        36        40        43         7
displacement |        74       119       196       250       131
  gear_ratio |        74      2.73     2.955      3.37  .6399999
----------------------------------------------------------------

The statistics you want are up to you. If you just wanted IQR and nothing else, you could have it.