Ricardo Ovaldia <[email protected]> asks why his -twoway lfit- command fails
to use the value labels for his x-variable, even though he specifies
-xlabel(1 2, valuelabel)-.
Svend Juul <[email protected]> diagnosed the problem when he wrote
> Perhaps surprisingly: -twoway scatter- does what Ricardo wants, but
>
> -twoway lfit- does not.
>
> It could be a deliberate decision, but it is a bit strange.
A semi-deliberate decision; maybe. Behind the scenes, -twoway lfit- and his
close cousin -twoway qfit- do not use the actual x-variable, but instead
generate their own variable so that you can control the number of points on
the line or curve using -n()- option. The value labels are not currently
being carried forward to the generated variable.
No matter the cause, this will be made to work in a future ado update.
Until then, Ricardo can explicitly place the text of the labels on the axis by
modifying his -xlabels()- option to
xlabel(1 "M" 2 "F", valuelabel)
If instead of two ticks with single character labels, there are many ticks
with long labels, Ricardo could adapt Svend's diagnosis into an alternate work
around. Add a scatter plot using the same variables and if qualifier before
his linear fit and make the markers invisible -- option -marker(none)-.
Because he would then have two plots, Ricardo will probably want to turn off
the legend, -legend(off)-.
-- Vince
[email protected]
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