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Re: st: [Graphics] how to set the length of an axis?


From   Ulrich Kohler <kohler@wzb.eu>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: [Graphics] how to set the length of an axis?
Date   Fri, 20 Mar 2009 10:17:18 +0100

Antoine,

I got some error messages from your solution, but this one points you in
a different direction and it arguably simpler. It calculates the numbers
for the histogram by hand and uses -tw rbar- instead of -tw histogram-:

------------------------------------------------------cut here---
clear
set scheme s2mono
webuse nlswork.dta, clear
g wage=exp(ln_wage)
su wage, de
drop if wage>r(p99)
egen t=group(year)
g ti=t+runiform()
g ti2=ti^2
g ti3=ti^3
qreg wage ti ti2 ti3
predict med
qreg wage ti ti2 ti3 , quantile(.95)
predict q95
qreg wage ti ti2 ti3 , quantile(.05)
predict q5

sum wage, meanonly
gen wageclass = autocode(wage,20,r(min),r(max))
by t wageclass, sort: gen wageperc = _N/r(N)

// rescale wageperc
sum wageperc, meanonly
replace wageperc = wageperc/r(max) * .80

gen lower = t
gen upper = t + wageperc

levelsof wageclass, local(K)
local width  = (`:word 2 of `K'' - `:word 1 of `K'')*.95
twoway                                         ///
  || rbar lower upper wageclass,               /// 
  color(gs12) barwidth(`width') horizontal     ///
  || line med q95 q5 ti, sort lcolor(black..)  

-----------------------------------------------------------------


Am Freitag, den 20.03.2009, 09:07 +0100 schrieb Antoine Terracol:
> Dear _all,
> 
> I was asked if I could reproduced a graphic like 
> http://addictedtor.free.fr/graphiques/RGraphGallery.php?graph=109
> in Stata.
> 
> Using nlswork.dta, I was able to produce the graph whose code is pasted 
> below.
> 
> As you can see, the years are not evenly spaced on the x-axis. In 
> particular, the part between "1" and "2" is much smaller than the rest.
> 
> I understand that, in fact, the total width of the sub graphs are all 
> equal, and that the visual difference is due to the presence of the y 
> axis and its legend in the first sub-graph.
> 
> Is there a way to set the length of the axis in the first sub graph, or, 
> alternatively, to produce a graph with just the y-axis in such a way 
> that it would look nice?
> 
> Best,
> Antoine
> 
> /*--------------------------------------------*/
> clear
> set scheme s2mono
> webuse nlswork.dta, clear
> g wage=exp(ln_wage)
> su wage, de
> drop if wage>r(p99)
> egen t=group(year)
> g ti=t+runiform()
> g ti2=ti^2
> g ti3=ti^3
> qreg wage ti ti2 ti3
> predict med
> qreg wage ti ti2 ti3 , quantile(.95)
> predict q95
> qreg wage ti ti2 ti3 , quantile(.05)
> predict q5
> 
> twoway (hist wage if t==1 , fcolor(gs14) plotr(m(zero)) 
> graphregion(margin(zero) color(white)) xlabel(0 "1") xtitle("") 
> ylabel(0(5)20, grid gmin gmax)  horiz) (line med q95 q5 ti if t==1, sort 
> xaxis(2) yaxis(2) ylabel(0(5)20, axis(2)) lcolor(black black black) 
> lwidth(thick thick thick) lpattern(solid solid solid) xscale(off 
> axis(2)) yscale(off axis(2)) plotr(m(zero))) , legend(off)  saving(a, 
> replace)
> local list "a.gph"
> 
> local t=2
> while `t'<=15 {
>      twoway (hist wage if t==`t', fcolor(gs14) plotr(m(zero)) 
> graphregion(margin(zero) color(white)) xlabel(0 "`t'") xtitle("") 
> yscale(off)  xtitle("") ylabel(0(5)20 , grid gmin gmax)  horiz) (line 
> med q95 q5 ti if t==`t', sort xaxis(2) yaxis(2) ylabel(0(5)20, axis(2)) 
> lcolor(black black black) lwidth(thick thick thick) lpattern(solid solid 
> solid) xscale(off axis(2)) yscale(off axis(2)) ) , legend(off) 
> saving(a`t', replace)
> 	local list "`list' a`t'.gph"
> 	local t=`t'+1
> }
> graph combine `list', imargin(0 0 0 0) row(1) graphregion(color(white)) 
> note(t, pos(6))
> /*--------------------------------------------------*/
> 
> *
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> *   http://www.stata.com/help.cgi?search
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> *   http://www.ats.ucla.edu/stat/stata/
-- 
kohler@wzb.eu
030 25491-361

*
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