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LASTUPTO: Stata module to collapse a dataset to have 1 observation for each of a list of X-values

Author

Listed:
  • Roger Newson

    (King's College London)

Programming Language

Stata

Abstract

lastupto inputs a dataset in memory with an X-variable, a list of X-values, and (optionally) a list of by-variables. It creates an output dataset (or resultsset}, with 1 observation per provided X-value in the list (or per X-value per by-group), and data on the variable values in the last observation in the dataset (or by-group) with an X-value up to and including the provided X-value, when the observations have been sorted by by-group, then by their X-values, and then by their pre-existing order. lastupto is very useful for condensing Kaplan-Meier curves in big datasets. lastupto uses the SSC package expgen, which must be installed if lastupto is to work.

Suggested Citation

  • Roger Newson, 2018. "LASTUPTO: Stata module to collapse a dataset to have 1 observation for each of a list of X-values," Statistical Software Components S458513, Boston College Department of Economics.
    • Handle: RePEc:boc:bocode:s458513
    Note: This module should be installed from within Stata by typing "ssc install lastupto". The module is made available under terms of the GPL v3 (https://www.gnu.org/licenses/gpl-3.0.txt). Windows users should not attempt to download these files with a web browser.
    as

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    File URL: http://fmwww.bc.edu/repec/bocode/l/lastupto.ado
    File Function: program code
    Download Restriction: no
    File URL: http://fmwww.bc.edu/repec/bocode/l/lastupto.sthlp
    File Function: help file
    Download Restriction: no
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    More about this item

    Keywords

    data management; collapse; Stata;
    All these keywords.

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