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

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

Subject |
st: RE: quirk: xlab overrides xscale in Stata8 |

Date |
Thu, 27 Mar 2003 11:45:35 -0000 |

Jan Brogger > > Just upgraded to Stata 8, latest updates, Windows XP. A > quirk discovered > in graphics. Stata8 does not respect the "xscale" option > when it figures > out the "xlabels", and then "xlabels" takes precedence over > "xscale" in > the drawing of the axis. It appears that "xscale" can only > be used to > expand the xaxis to the right, not truncate it (even though you are > within the limits of the data). You have to change both > xscale and xlab > to achieve the desired effect. An example: > > sysuse auto > *range of weight is 1760 ro 4840 > summ weight > > *default plot, x scale ranges from 1760 to 5000: > scatter turn weight > > *plot with x scale expanded to 6000, no problem: > scatter turn weight, xsc(r(0,6000)) > > *plot with x scale restricted to the maximum value of the > data, does NOT > work: > scatter turn weight, xsc(r(0,4840)) > > *you have to also change the xlab option, then xscale takes effect. > scatter turn weight, xsc(r(0,4840)) xlab(2000 4840) > > This is somewhat counter-intuitive. This is not really a quirk, but it is a change. In general, one change from 7 to 8 is that "nice round" labels (as formerly obtained by -xlabel- and/or -ylabel- without arguments) are now the default. Previously, the default was of course labelling based on data extremes. We could argue about whether that is a better default, but my own view is that it is. In this example, the default labelling of -turn- is 2000 3000 4000 5000 and as Jan notes only by spelling out that you want something else can you change the labels. As before, the scale limits set -- now through r(min, max) -- act only to extend the axes from what the graph would be otherwise. In this case, only by changing the labelling explicitly does the "otherwise" change. 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: quirk: xlab overrides xscale in Stata8***From:*"Jan Brogger" <jan.brogger@med.uib.no>

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