Re: [Gretl-users] draw a specific fitted line

On Sun, 9 Nov 2014, Artur T. wrote: > Dear gretl users, > > I trying to draw a specific fitted line into a scatter plot. However, I > can't figure out how the series called "fitted" in the example below > does appear as a straight line. The option --with-lines=fitted does not > solve the issue. Does anybody have a nice solution to this? > > <hansl> > open denmark.gdt --quiet > > series D = (diff(LRY)>0) # define dummy > series d_LRY = diff(LRY) > series DLRY = D*d_LRY # interaction term > series dM = diff(LRM) > ols dM 0 d_LRY DLRY # Threshold OLS > series fitted = $yhat > > gnuplot dM fitted d_LRY --output=display \ > { set style line 1 lc rgb 'blue' pt 6 ; \ > set style line 2 lc rgb 'red' pt 5 ; } > <\hansl> 1) The old-style gnuplot command "set style line" is not going to override the new-style "set linetype" directives put into the plot file by gretl. 2) While "with-lines=fitted" should work, it won't actually do what you want without further work: since the x-axis values are not sorted, you'll get a sort of linear spider-web with the fitted line doubling back on itself repeatedly. 3) I'd recommand using gretl's new "plot block" syntax for this sort of thing. (Reminder to self: document this!) http://lists.wfu.edu/pipermail/gretl-devel/2014-October/005341.html Solution: <hansl> open denmark.gdt --quiet series D = (diff(LRY)>0) # define dummy series d_LRY = diff(LRY) series DLRY = D*d_LRY # interaction term series dM = diff(LRM) ols dM 0 d_LRY DLRY # Threshold OLS series fitted = $yhat list plotlist = dM fitted d_LRY matrix plotmat = msortby({plotlist}, 3) plot plotmat option with-lines=fitted literal set linetype 1 lc rgb 'blue' pt 6 literal set linetype 2 lc rgb 'red' pt 5 end plot --output=display </hansl> Allin _______________________________________________ Gretl-users mailing list Gretl-users(a)lists.wfu.edu http://lists.wfu.edu/mailman/listinfo/gretl-users