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From |
"Nick Cox" <n.j.cox@durham.ac.uk> |

To |
<statalist@hsphsun2.harvard.edu> |

Subject |
st: RE: bar semi-shadedness - a limitation, or not? |

Date |
Mon, 16 Dec 2002 11:16:19 -0000 |

Lee Sieswerda > > For as long as I've used Stata, a limitation that I thought > insuperable was > the production of a fully shaded bar graph. So, for a long > time, I've > produced graphs at the darkest semi-shaded level available > (4), and then > opened them in a graphics program where I could replace the > shading with > something darker. Alternatively, I'm sad to say, I made my > graphs in Excel > after producing the appropriate data in Stata. An > irritation, to be sure, > but one I've grown accustomed to. Well, I was quite > surprised this morning > when I tried Nick Cox's fabulous program -tabhbar- and > discovered that when > I specify the option -shading(4)- I get bars that are > actually fully shaded. > After a bit of testing, here is the relationship that I found: > > tabhbar, shading(2) = graph, shading(3) > tabhbar, shading(3) = graph, shading(4) > tabhbar, shading(4) = no equivalent using -graph- > > So, my question: is it just me, or do others get the same results? > My inclination is the other way round, as I like totally unshaded bars, a lot! (Or even no bars at all, but that is a different story.) Note that -tabhbar- is a wrapper for -hbar- which for bar shadings just calls gph box ... <shading> The documentation for -gph- refers to shadings 0 1 2 3 4. The documentation for -grcolor- refers to shadings 1 2 3 4. At least with Stata 7 for Windows XP, on what I think is a fairly standard PC, I agree with Lee that gph box ... 4 is darker than you get with graph ... bar sh(4) I conjecture that shading to -gph- = (shading to -graph, bar()-) - 1 and that the very darkest shading available via -gph- is not used by -graph, bar()-. At the opposite end, -hbar- and thus -tabhbar- allows a shading of . (think missing) which gives you an unshaded bar. This is implemented with -hbar- as just drawing the 4 bounding lines defining a rectangle and is idiosyncratic to -hbar-. This isn't clear from the help file for -hbar- as read in Stata 7, as Stata 7 (for once) misreads the help file written for Stata 6. Nick n.j.cox@durham.ac.uk * * For searches and help try: * http://www.stata.com/support/faqs/res/findit.html * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**References**:**st: bar semi-shadedness - a limitation, or not?***From:*Lee Sieswerda <Lee.Sieswerda@tbdhu.com>

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