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VIOLIN: Stata module to generate violin plots


  • Thomas Steichen



violin produces violin plots, a graphical box plot--kernel density synergism. The violin plot combines the basic summary statistics of a box plot with the visual information provided by a local density estimator. The goal is to reveal the distributional structure in a variable. Much like a traditional box plot, the violin plot displays the median as a short horizontal line, the first-to-third interquartile range as a narrow shaded box, and the lower-to-upper adjacent value range as a vertical line, but it does not plot outside values. Instead, it "boxes" the data with mirrored density curves and labels the y-axis at the minimum, median and maximum observed data values. This is version 1.4.1 of the software. This version has been modified to run correctly under Stata Version 7 (though it remains a version 6 program).

Suggested Citation

  • Thomas Steichen, 1998. "VIOLIN: Stata module to generate violin plots," Statistical Software Components S347301, Boston College Department of Economics, revised 04 Feb 2001.
  • Handle: RePEc:boc:bocode:s347301
    Note: This module may be installed from within Stata by typing "ssc install violin". Windows users should not attempt to download these files with a web browser.

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