Stata (Version 15) help for "graph box" says
and in more detail:
(Omitting the text on the caps.)
However, when reading Nick Cox's "Speaking Stata: Creating and varying box plots
" The Stata Journal (2009) 9, Number 3, pp. 478–496 it says on page
However, I do not know if since 2009 the defaults in Stata changed. Can anyone enlighten me, please?
alsize(#) width of adjacent line; default is 67
alsize(#) ... specify the width of the adjacent line... You may specify these options whether or not you
specify cwhiskers. alsize() ... specified in percentage-of-box-width units; the defaults are alsize(67). Thus the adjacent lines extend
two-thirds the width of a box ...
specify cwhiskers. alsize() ... specified in percentage-of-box-width units; the defaults are alsize(67). Thus the adjacent lines extend
two-thirds the width of a box ...
However, when reading Nick Cox's "Speaking Stata: Creating and varying box plots
" The Stata Journal (2009) 9, Number 3, pp. 478–496 it says on page
graph box and graph hbox by default follow what is perhaps the most common recipe (Tukey 1977):
- Lines, often called whiskers, are drawn to span all data points within 1.5 IQR of the nearer quartile. That is, one whisker extends to include all data points within 1.5 IQR of the upper quartile and stops at the largest such value, while the other whisker extends to include all data within 1.5 IQR of the lower quartile and stops at the smallest such value. Tukey called the outer limits of the whiskers adjacent values.
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