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


From   Antoine Terracol <Antoine.Terracol@univ-paris1.fr>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: [Graphics] how to set the length of an axis?
Date   Fri, 20 Mar 2009 10:49:43 +0100

Thanks Ulrich, excellent solution, much simpler than mine!

I wonder now if such a simple solution would also be available for the 
upper part of the R graph, since -graph box- is not a twoway type and, 
as I understand it, cannot be overlayed with another -twoway- graph...

Antoine

Ulrich Kohler wrote:
> 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))
>> /*--------------------------------------------------*/
>>
>> *
>> *   For searches and help try:
>> *   http://www.stata.com/help.cgi?search
>> *   http://www.stata.com/support/statalist/faq
>> *   http://www.ats.ucla.edu/stat/stata/


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