Re: [Gretl-users] Regression coefficients

> I don't remember exactly, offhand, what the project was here, but it > sounnds like you need to look at the $coeff accessor (to grab the exact > coefficients after estimation) and the lincomb() function (to create a > series via a linear combination of terms). > > Allin Cottrell Thanks for your answer, though I think I didn't express myself correctly. For the context : I am studying the evolution of max and min temperatures throught Feb-March-Apr of every year, with special emphasis on March. My main goal is to sort them into two categories : 1) when they have a tendency to rise during the month and 2) when they tend to sink. So as to avoid plotting a graph for each year and judging on the basis of that what the tendency is, I was planning to plot the 3rd-degree regression using the "polynomial trend" (or whatever it's called in English, I' sorry, I downloaded Gretl in French to better understand what the others in my group talk about) filter. Can I somehow find out what that polynom is ? Does this seem like an intelligent way to go ? If not, could you please be so good as to explain how you would recommend I proceed, keeping in mind that I am (to my great shame) an utter nincompoop in matters Gretl ?