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

Roger Newson

Statistical Software Components from Boston College Department of Economics

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.

Language: Stata
Requires: Stata version 10.0 and expgen from SSC (q.v.)
Keywords: data management; collapse (search for similar items in EconPapers)
Date: 2018-08-06
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.
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http://fmwww.bc.edu/repec/bocode/l/lastupto.ado program code (text/plain)
http://fmwww.bc.edu/repec/bocode/l/lastupto.sthlp help file (text/plain)

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