st: Overlay multple axes' labels?

[Nick Winter <nwinter@virginia.edu>]

Hi,

I'm trying to make a single graph that combines three data series, which 
are themselves on three different scales.  I can get everything I want, 
except for labeling the y-axes for plots 2 and 3.

The following demonstrates the problem: I want the volume labels (0 and 
10,000) and the closing price change (-50, 0, and 50) to be on top of 
each other, rather than having the latter on a separate axis to the 
right of the former.



* begin example
sysuse sp500

gr twoway connected high date, yaxis(1) ///
    ysca(ra(500) axis(1)) ///
  || bar volume date, yaxis(2) ///
    ysca(alt ra(200000) axis(2)) ///
    ylab(0 10000, angle(horiz) grid labsize(small) axis(2)) ///
  || bar change date, yaxis(3) ///
    ysca(alt ra(-250 600) axis(3)) ///
    ylab(-50 0 50, angle(horiz) labsize(small) axis(3)) ///
    legend(off)
* end example


Am I missing something obvious?

I messed with creating the three plots separately and using -graph 
combine- to put them together in a single column, but the different 
widths of the y labels across the plots means that the x-axes don't line 
up with each other, even with the -xcommon- option.

Something like:


* begin second example
gr twoway connected high date, xsca(off) ///
  graphregion(margin(b 0)) name(one, replace)

gr twoway bar volume date, ysca(alt) xsca(off) ///
  ylab(0 10000, angle(horiz) grid labsize(small)) ///
  graphregion(margin(t 0 b 0)) ///
  name(two, replace)

gr twoway bar change date, ysca(alt) ///
  ylab(-50 0 50, angle(horiz) labsize(small)) ///
  graphregion(margin(t 0)) ///
  name(three, replace)

gr combine one two three, col(1) xcommon
* end second example


Any thoughts?
--
--------------------------------------------------------------
Nicholas Winter                                 434.924.6994 t
Assistant Professor                             434.924.3359 f
Department of Politics                  nwinter@virginia.edu e
University of Virginia          faculty.virginia.edu/nwinter w
S385 Gibson Hall, South Lawn  Map: http://tinyurl.com/uvaSLmap
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