On Thursday 04 December 2008 19:52:45 Scott wrote: > In spite of my best efforts I cannot get lambdify to cope with array/ > list inputs. All the lambdify examples have 1D inputs. > Can you pass in x= x1,x2 ? > dof and d_dof are both 4*1 lists > > I am also have trouble with lambdify seeing list if length 4 as on > input rather thab as 4 inputs, Iam using veversion .6.3 > > Cheers > > Scott > > def F0(dof,d_dof,U,dt): > > > h1=dof[0];theta1=dof[1];v_h1=dof[2];v_theta1=dof[3] > > > delta_h=d_dof[0];delta_theta=d_dof[1];delta_v_h=d_dof > > > [2];delta_v_theta=d_dof[3] > > > res=-delta_v_h/2 - delta_v_theta/20 + dt*(-2*h1/25 - delta_h/25 > > > - 3*U* (v_theta1 + delta_v_theta/2)/50 - U*(v_h1 + delta_v_h/2)/20 - > > > U**2* (theta1 + delta_theta/2)/20)#qs > > > return res
Hello Scott, it isn't that what you are looking for? In [1]: from numpy import array In [2]: dof = array((1,2,3)) In [3]: f = lambdify((x,y,z),dof[0]*x+dof[1]*y+dof[2]*z,"numpy") In [4]: f(1,2,3) Out[4]: 14 In [5]: f(1,1,1) Out[5]: 6 In [6]: f(3,2,1) Out[6]: 10 Remember that dof values are immutable inside the lambdified function. In [7]: dof[1] = 100 In [8]: f(3,2,1) Out[8]: 10 Cheers, Riccardo --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "sympy" group. To post to this group, send email to sympy@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sympy?hl=en -~----------~----~----~----~------~----~------~--~---
