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EQPRHISTOGRAM: Stata module for equal probability histogram

Author

Listed:
  • Nicholas J. Cox

    (Durham University)

Programming Language

Stata

Abstract

eqprhistogram shows a histogram constructed so that each bar represents the same fraction of the data. As an example, suppose we calculate the minimum, the lower quartile, the median, the upper quartile and the maximum of a variable. These 5 quantiles allow us to draw a histogram with 4 bars, each representing 1/4 of the total (possibly weighted) frequency, or of the total probability 1. The height of each bar representing the average probability density in each interval should be 1 / 4 * (upper quantile - lower quantile). eqprhistogram refuses to draw graphs when the quantiles calculated are not distinct. This is likely with categorical or discrete or highly rounded data, especially as the number of quantiles approaches the number of values.

Suggested Citation

  • Nicholas J. Cox, 2003. "EQPRHISTOGRAM: Stata module for equal probability histogram," Statistical Software Components S432701, Boston College Department of Economics, revised 04 Aug 2003.
    • Handle: RePEc:boc:bocode:s432701
    Note: This module may be installed from within Stata by typing "ssc install eqprhistogram". 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

    Download full text from publisher

    File URL: http://fmwww.bc.edu/repec/bocode/e/eqprhistogram.ado
    File Function: program code
    Download Restriction: no
    File URL: http://fmwww.bc.edu/repec/bocode/e/eqprhistogram.hlp
    File Function: help file
    Download Restriction: no
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