[Gretl-devel] a non-numeric question on fdjac

Dear All, To reproduce x = {1,1}' catch eval numhess(x,x'*x) catch eval fdjac(x,x'*x) catch eval fdjac(x,(x'*x)) function matrix i(matrix x) return x end function eval numhess(x,i(x'*x)) eval fdjac(x,i(x'*x)) Why it may look trivial, I spent some time to guess to use identity function I can imagine 2 possibilities: 1) to include native identity function in hansl 2)fdjac and numhess should do something similar inside ??? Oleh