RE: st: RE: Bargraphs, order, SD

["Nick Cox" <n.j.cox@durham.ac.uk>]

for "allowed" read "not allowed"

Nick 
n.j.cox@durham.ac.uk 

> -----Original Message-----
> From: owner-statalist@hsphsun2.harvard.edu
> [mailto:owner-statalist@hsphsun2.harvard.edu]On Behalf Of Nick Cox
> Sent: 11 June 2007 13:01
> To: statalist@hsphsun2.harvard.edu
> Subject: RE: st: RE: Bargraphs, order, SD
> 
> 
> This question, as I understand it, has already been 
> answered. 
> 
> Ulrich's example shows that you can -- and indeed
> for many purposes need to -- use -encode- to map
> a string variable to a numeric variable. That is, 
> Stata is telling you that a string variable is allowed
> in the way that you have tried; hence you must use
> a numeric variable instead. 
> 
> It is difficult otherwise to comment on what you 
> typed if you don't show it to us. 
> 
> Nick 
> n.j.cox@durham.ac.uk 
> 
> Knag Anne-Christine
>  
> > Hi, thank you. But how can I use a twoway when I am 
> plotting just one
> > variable (e.g weight) of different types (1C, 1L etc)?
> > I tried the suggested syntax, but it came up with varlist:  
> > type:  string
> > variable not allowed
> > ?
>  
> > On 6/11/07 1:00 PM, "Nick Cox" <n.j.cox@durham.ac.uk> wrote:
> > 
> > > You need to move away from -graph bar- once you
> > > want to do something not obviously available.
> > > 
> > > -twoway bar- is ultimately more flexible. Ulrich's
> > > example underlines this, so heed his advice.
> > > 
> > > Here is a dopey example:
> > > 
> > > u auto, clear
> > > egen mean = mean(mpg), by(foreign)
> > > egen sd = sd(mpg), by(foreign)
> > > gen upper = mean + sd
> > > gen lower = mean - sd
> > > twoway bar mean foreign, barw(0.4) || ///
> > > rcap upper lower foreign, xla(0 1, valuelabel) ///
> > > ysc(r(0, .)) legend(off) ///
> > > subtitle(mean +/- sd, place(w)) ytitle(`: var label mpg')
> > > 
> > > Biologists in particular seems overly fond of just
> > > showing means (+/- sd, se, or constant * se) in what
> > > Stata user Paul Seed has called detonator plots.
> > > 
> > > A dotplot with means and sds added (see -dotplot-)
> > > shows far more information.
> > > 
> > > Nick 
> > > n.j.cox@durham.ac.uk
> > > 
> > > Knag Anne-Christine
> > >  
> > >> Thank you Ulrich.
> > >> What do I then do if I want to make simple one-way bargraphs
> > >> by the same
> > >> order? 
> > >> The syntax (without the order)
> > >> 
> > >> graph bar (mean)  variable1, over (type)
> > >> 
> > >> And how can I add SD to the bars?
> > >  
> > >> On 6/8/07 9:51 AM, "Ulrich Kohler" <kohler@wzb.eu> wrote:
> > >> 
> > >>> Knag Anne-Christine wrote:
> > >>>> By "this order" I meant the order that I have given
> > >>>> syntax:
> > >>>> generate order = 1 if type== "1C"
> > >>>> replace order = 2 if type== "1L"
> > >>>> replace order = 3 if type== "1M"
> > >>>> replace order = 4 if type == "1E"
> > >>>> replace order = 5 if type== "2C"
> > >>>> replace order = 6 if type== "2L"
> > >>>> replace order = 7 if type== "2M"
> > >>>> replace order = 8 if type== "2H"
> > >>>> replace order = 9 if type== "2E"
> > >>>> 
> > >>>> Since the graphs are ordered alphanumerically I need to
> > >> add an "sort
> > >>>> according to order"-command somewhere in the syntax for 
> > the plots:
> > >>>> 
> > >>>> twoway (bar production day_of_prod), ytitle(Production)
> > >> xtitle(Day of
> > >>>> production) by(type)
> > >>>> 
> > >>>> I also want to include a 10th plot showing the total
> > >> production of all
> > >>>> types.
> > >>> 
> > >>> How about:
> > >>> 
> > >>> ----------------------------------------------example.do
> > >>> label define order                                ///
> > >>>   1 "1C" 2 "1L" 3 "1M" 4 "1E" 5 "2C"              ///
> > >>>   6 "2L" 7 "2M" 8 "2H" 9 "2E"
> > >>> 
> > >>> encode type, gen(order) label(order)
> > >>> 
> > >>> twoway                                            ///
> > >>>  || bar production day_of_prod                    ///
> > >>>  || , ytitle(Production) xtitle(Day ofproduction) ///
> > >>>       by(order, total)
> > >>> ---------------------------------------------------------
> 
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