# Re: st: legend on graph help

 From Ulrich Kohler To statalist@hsphsun2.harvard.edu Subject Re: st: legend on graph help Date Tue, 14 Mar 2006 14:50:41 +0100

```Svend Juul wrote, in response to Scott C and Scott M:
> Personal view: I think the || notation is a lot less transparent than
> the () notation. So I would write the above command:
>
> twoway                                                   ///
>    (line mpg price if fore == 0 , sort lc(blue) lp(dash)) ///
>    (line mpg price if fore == 1 , sort lc(black))         ///
>    ,                                                      ///
>    legend(order(1 "white sex ratio" 2 "black sex ratio"))

I aggree with most of the things Svend said, however, regarding the ||
notation I recently changed my mind. I meanwhile write commands like the
above as follows:

twoway                                                      ///
|| line mpg price if fore == 0 , sort lc(blue) lp(dash)   ///
|| line mpg price if fore == 1 , sort lc(black)           ///
|| , legend(order(1 "white sex ratio" 2 "black sex ratio")

Note that I use || to start the plots instead of ending them as it is proposed
in the manual. I admitt that the first mention of || is not necessary but I
think that it makes the command at least as transparent as with the ()
notation. Moreover I think it is even nicer with longer plot-subcommands:

twoway                                                    ///
|| line mpg price                                       ///
if fore == 0  & whatever you like                    ///
, sort lc(blue) lp(dash)  bla bla bla bal bal        ///
|| line mpg price                                       ///
if fore == 1  & some other exp                       ///
, sort lc(black) etc etc etc etc                     ///
|| , legend(order(1 "white sex ratio" 2 "black sex ratio")

Using || or () is clearly a matter of taste, and I don't want to start arguing
about it. However, what I am trying to say is that starting lines with || can
also help to structure long graph commands.

Uli

--
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