[Gretl-users] draw a specific fitted line

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> Best, Artur