twoway scatter plot

[Dario Maimone Ansaldo Patti]

Dear All,

I have a problem that is making me crazy. I use the following command line:

twoway (scatter wlnyw pc if pc<=5||lfit wlnyw pc if pc<=5)

It works fine.

However if I write:

twoway (scatter wlnyw pc if pc<=5||lfit wlnyw pc if pc<=5), ytitle(per worker GDP) xtitle(Political competition) title(Political Competition and per workek GDP when pc<=5)

I got the error message " 5| invalid name"

In addition if I drop the fitted line and I write:

twoway (scatter wlnyw pc if pc<=5), ytitle(per worker GDP) xtitle(Political competition) title(Political Competition and per workek GDP when pc<=5)

it works fine.

What am I doing wrong?

Thanks in advance

ADDENDUM

I discovered that I get what I need if I use:

twoway (scatter wlnyw pc if pc<=5) (lfit wlnyw pc if pc<=5), ytitle(per worker GDP) xtitle(Political competition) title(Political Competition and per workek GDP when pc<=5)

I cannot understand the logic. Why adding additional information into the command line:

twoway (scatter wlnyw pc if pc<=5||lfit wlnyw pc if pc<=5), ytitle(per worker GDP) xtitle(Political competition) title(Political Competition and per workek GDP when pc<=5)

does it not work?

[Eric de Souza]

You are combining two different syntanes: () and ||
If you had typed
twoway scatter wlnyw pc if pc<=5 || lfit wlnyw pc if pc<=5, ytitle(per worker GDP) xtitle(Political competition) title(Political Competition and per workek GDP when pc<=5)
it would have worked
Detail: you begin with a ( and then you switch to || where Stata is waiting for a ). Therefore, Stata interprets 5| as a name

[Josh Clothiaux]

Pages 6 and 7 of the twoway manual explain the notation differences: http://www.stata.com/manuals13/g-2gr...g-2graphtwoway