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SUNFLOWER: Stata module to generate density distribution sunflower plots


  • William D. Dupont

    (Vanderbilt University School of Medicine)

  • W. Dale Plummer Jr.

    (Vanderbilt University School of Medicine)

Programming Language



sunflower draws density distribution sunflower plots. These plots are useful for displaying bivariate data whose density is too great for conventional scatter plots to be effective. A sunflower is a number of line segments of equal length, called petals, that radiate from a central point. There are two varieties of sunflowers: light and dark. Each petal of a light sunflower represents one observation. Each petal of a dark sunflower represents a specific number of observations specified by the user. The program uses dark and light sunflowers to represent high and medium density regions of the data, and dots or circles to represent individual observations in low density regions. This routine is built in to Stata as of version 8.1.

Suggested Citation

  • William D. Dupont & W. Dale Plummer Jr., 2002. "SUNFLOWER: Stata module to generate density distribution sunflower plots," Statistical Software Components S430201, Boston College Department of Economics, revised 04 Nov 2003.
  • Handle: RePEc:boc:bocode:s430201
    Note: This module may be installed from within Stata by typing "ssc install sunflower". The module is made available under terms of the GPL v3 ( Windows users should not attempt to download these files with a web browser.

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    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.

    Cited by:

    1. Xingle Long, 2011. "Intellectual property rights protection and recorded music sales—focus on 26 OECD countries panel data," Frontiers of Economics in China, Springer;Higher Education Press, vol. 6(2), pages 211-228, June.
    2. Dupont, William D. & Plummer Jr., W. Dale, 2003. "Density Distribution Sunflower Plots," Journal of Statistical Software, Foundation for Open Access Statistics, vol. 8(i03).


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