Giorgio Gozzi schrieb: > Hi everone.. I am recently trying to use and learn GRETL..I need > help..when i try to confront the sign of the return of the time series > of index FTSEMIB with the sign of the time series of the returns of > every of the of every of its 40 elementary members. In order to count > how many times there is an agreement between the sign of each return and > that one of index FTSEMIB. > > I wanted to resolve the problem using the function SIGN but such > function lacks in the directory of Gretl. > > I will be very pleased to have some suggestion to this issue. >
Hi, series myproduct = series1 * series2 series nonnegprod = (myproduct >= 0) should work I hope. (I.e., a boolean condition in parentheses should produce a dummy series indicating where the condition is true.) hth, sven
