RE: st: RE: Bargraphs, order, SD

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

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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