fenics team mailing list archive

[Chong Luo <luo.chong@xxxxxxxxx>]

Hi,

I want to compare the solution given by FEniCS to the exact solution, so that I can get the convergence rate. However, I don't know how to find the difference between two functions. It seems that the solution given by FEniCS is a DiscreteFunction, while the exact solution was defined by me via overriding "eval()", thus a UserFunction. But I don't know how to get a function whose value is the difference of these two functions.

Could you help me with this? Thank you!

Best,
Chong





      ___________________________________________________________ 
雅虎邮箱，终生伙伴！ 
http://mail.yahoo.com.cn/