Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
st: RE: Cumulative Distribution Function (CDF)
From
Nick Cox <[email protected]>
To
"'[email protected]'" <[email protected]>
Subject
st: RE: Cumulative Distribution Function (CDF)
Date
Mon, 7 Feb 2011 17:40:34 +0000
This message came bound up with e-junk, HTML and a .gif. Plain text (ASCII) only please.
I don't understand "cannot find it", but any way it's there. Here -groups- (SSC) is used in passing.
. sysuse auto
(1978 Automobile Data)
. cumul mpg, gen(cumpg) equal
. groups mpg cumpg
+----------------------------------+
| mpg cumpg Freq. Percent |
|----------------------------------|
| 12 .027027 2 2.70 |
| 14 .1081081 6 8.11 |
| 15 .1351351 2 2.70 |
| 16 .1891892 4 5.41 |
| 17 .2432432 4 5.41 |
|----------------------------------|
| 18 .3648649 9 12.16 |
| 19 .472973 8 10.81 |
| 20 .5135135 3 4.05 |
| 21 .5810811 5 6.76 |
| 22 .6486486 5 6.76 |
|----------------------------------|
| 23 .6891892 3 4.05 |
| 24 .7432432 4 5.41 |
| 25 .8108108 5 6.76 |
| 26 .8513514 3 4.05 |
| 28 .8918919 3 4.05 |
|----------------------------------|
| 29 .9054054 1 1.35 |
| 30 .9324324 2 2.70 |
| 31 .9459459 1 1.35 |
| 34 .9594595 1 1.35 |
| 35 .9864865 2 2.70 |
|----------------------------------|
| 41 1 1 1.35 |
+----------------------------------+
. duplicates list mpg cumpg
Duplicates in terms of mpg cumpg
+--------------------------------+
| group: obs: mpg cumpg |
|--------------------------------|
| 1 26 12 .027027 |
| 1 27 12 .027027 |
| 2 11 14 .1081081 |
| 2 12 14 .1081081 |
| 2 28 14 .1081081 |
|--------------------------------|
| 2 30 14 .1081081 |
| 2 33 14 .1081081 |
| 2 64 14 .1081081 |
| 3 5 15 .1351351 |
| 3 31 15 .1351351 |
|--------------------------------|
| 4 9 16 .1891892 |
| 4 15 16 .1891892 |
| 4 22 16 .1891892 |
| 4 41 16 .1891892 |
| 5 2 17 .2432432 |
|--------------------------------|
| 5 23 17 .2432432 |
| 5 53 17 .2432432 |
| 5 74 17 .2432432 |
| 6 6 18 .3648649 |
| 6 21 18 .3648649 |
|--------------------------------|
| 6 32 18 .3648649 |
| 6 38 18 .3648649 |
| 6 46 18 .3648649 |
| 6 47 18 .3648649 |
| 6 48 18 .3648649 |
|--------------------------------|
| 6 67 18 .3648649 |
| 6 69 18 .3648649 |
| 7 10 19 .472973 |
| 7 19 19 .472973 |
| 7 36 19 .472973 |
|--------------------------------|
| 7 37 19 .472973 |
| 7 39 19 .472973 |
| 7 49 19 .472973 |
| 7 50 19 .472973 |
| 7 51 19 .472973 |
|--------------------------------|
| 8 4 20 .5135135 |
| 8 8 20 .5135135 |
| 8 34 20 .5135135 |
| 9 13 21 .5810811 |
| 9 25 21 .5810811 |
|--------------------------------|
| 9 35 21 .5810811 |
| 9 59 21 .5810811 |
| 9 60 21 .5810811 |
| 10 1 22 .6486486 |
| 10 3 22 .6486486 |
|--------------------------------|
| 10 16 22 .6486486 |
| 10 17 22 .6486486 |
| 10 29 22 .6486486 |
| 11 54 23 .6891892 |
| 11 56 23 .6891892 |
|--------------------------------|
| 11 70 23 .6891892 |
| 12 18 24 .7432432 |
| 12 40 24 .7432432 |
| 12 52 24 .7432432 |
| 12 58 24 .7432432 |
|--------------------------------|
| 13 44 25 .8108108 |
| 13 55 25 .8108108 |
| 13 61 25 .8108108 |
| 13 72 25 .8108108 |
| 13 73 25 .8108108 |
|--------------------------------|
| 14 7 26 .8513514 |
| 14 45 26 .8513514 |
| 14 65 26 .8513514 |
| 15 24 28 .8918919 |
| 15 42 28 .8918919 |
|--------------------------------|
| 15 62 28 .8918919 |
| 16 20 30 .9324324 |
| 16 63 30 .9324324 |
| 17 57 35 .9864865 |
| 17 66 35 .9864865 |
+--------------------------------+
Nick
[email protected]
[email protected]
I want to calculate the Cumulative Distribution Function (CDF) using - cumul - and cannot find the -equal- option to assign the same cumulative probability to each tied value.
I am using stata 11 and read that in 2003 -equal- option was added to -cumul- (as stated in http://www.stata.com/support/faqs/stat/pcrank.html), however I cannot find it.
Any idea of an option to assign the same cumulative probability to each tied value when using - cumul- ?
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/