Re: st: Graph overlay order

[Nick Winter <nw53@cornell.edu>]

I think this has come up before, and I think I recall that the answer 
is that (x|y)line() is always behind the data.

But you can use -twoway function- with the horizontal option to put a 
line on top. For example (using the auto dataset):

  . graph twoway histogram mpg , freq || function y=21.2973 , 
range(0 25) horizontal

You can also get more control over lines (e.g., not horizonal and 
vertical), with -pci- and -pcarrowi-, eg:

  . graph twoway histogram mpg , freq || pcarrowi 20 21.2973 13 
21.2973 "Mean", mlabpos(12)

(Though I think these are version 9 additions.)

--Nick Winter




 to use At 10:43 AM 2/14/2006, you wrote:

> I'm still using STATA 8.2.
>
> I have plotted a histogram with a normal curve centered at the mean 
> and scaled to the standard deviation using:
>
> graph twoway histogram Wgt if Lot == 9,freq width(25) xline(575) 
> ||function SD = normden((x - 575)/49)*30, range(420 750) 
> xscale(range(350 900)) xlabel(400(100)800)  title("Lot 9 Histogram, 
> Mean, Standard Deviation")
>
> The 'xline(575) produces a line from the x axis that is just the way 
> I want it to look, except it is behind the histogram rather than in 
> front of it.
>
> I've tried placing the 'xline' option in the histogram statement and 
> in the function statement but in either case the line is plotted 
> behind the histogram.
>
> Is it possible to control the overlay order of added lines? I've 
> looked for control of overlay orders for lines in 
> added_line_options, addedlinestyle, lines and linestyle. Have I 
> missed it in there somewhere? I'll be grateful for any advice.
>
> Thanks,
>
> Brad
>
> Bradley D. De Groot, D.V.M., Ph.D.
> Veterinary Epidemiologist
> KSU-CVM-DMP-FAHMC
> Mosier I-102
> 1800 Denison Ave.
> Manhattan KS 66506
> (O) 785 532 4845
> (F) 785 532 4288
> bdegroot@vet.ksu.edu
>
>
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________________________________________________________
Nicholas J. G. Winter                     607.255.8819 t
Assistant Professor                       607.255.4530 f
Department of Government              nw53@cornell.edu e
Cornell University        falcon.arts.cornell.edu/nw53 w
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Ithaca, NY 14853-4601 

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