Notice: On March 31, it was **announced** that Statalist is moving from an email list to a **forum**. The old list will shut down on April 23, and its replacement, **statalist.org** is already up and running.

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

From |
Nick Cox <n.j.cox@durham.ac.uk> |

To |
"'statalist@hsphsun2.harvard.edu'" <statalist@hsphsun2.harvard.edu> |

Subject |
st: RE: how to calculate cumulative number of organizations for stcox? |

Date |
Wed, 15 Jun 2011 22:55:03 +0100 |

Have a look at FAQ . . . . . . . . . . . . . . Calculating the number of distinct values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . N. J. Cox 9/06 How do I calculate the number of distinct values seen so far? http://www.stata.com/support/faqs/data/distinctvalues.html Nick n.j.cox@durham.ac.uk Caleb Southworth My data include a continuous date and organizations. How can I calculate the cumulative number of organizations in existence at time t? I could do this by year. My strategy at present it to calculate the survival interval for h(t_i-t). I would like to calculate the number of organizations in existence at the beginning of that interval. Thanks!--Caleb . stset date, id(id) fail(found==0) id: id failure event: found == 0 obs. time interval: (date[_n-1], date] exit on or before: failure ------------------------------------------------------------------------------ 621 total obs. 565 obs. end on or before enter() ------------------------------------------------------------------------------ 56 obs. remaining, representing 56 subjects 18 failures in single failure-per-subject data 212648 total analysis time at risk, at risk from t = 0 earliest observed entry t = 0 last observed exit t = 8294 . end of do-file . stdes failure _d: found == 0 analysis time _t: date id: id |-------------- per subject --------------| Category total mean min median max ------------------------------------------------------------------------------ no. of subjects 56 no. of records 56 1 1 1 1 (first) entry time 0 0 0 0 (final) exit time 3797.286 1 3925 8294 subjects with gap 0 time on gap if gap 0 . . . . time at risk 212648 3797.286 1 3925 8294 failures 18 .3214286 0 0 1 ------------------------------------------------------------------------------ * * 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/

**References**:**st: how to calculate cumulative number of organizations for stcox?***From:*Caleb Southworth <caleb.southworth@gmail.com>

- Prev by Date:
**st: counting number of variables in a varlist** - Next by Date:
**st: RE: counting number of variables in a varlist** - Previous by thread:
**st: how to calculate cumulative number of organizations for stcox?** - Next by thread:
**st: finding incorrectly entered data** - Index(es):