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Basic sim code functional.

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This commit is contained in:
Neil Lawrence 2013-10-14 22:09:41 +01:00
parent fe30db1331
commit da2a88826d
4 changed files with 62 additions and 23 deletions
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12
GPy/util/symbolic.py
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@ -22,9 +22,19 @@ class ln_diff_erf(Function):
class sim_h(Function):
nargs = 5
def fdiff(self, argindex=1):
pass
@classmethod
def eval(cls, t, tprime, d_i, d_j, l):
return exp((d_j/2*l)**2)/(d_i+d_j)*(exp(-d_j*(tprime - t))*(erf((tprime-t)/l - d_j/2*l) + erf(t/l + d_j/2*l)) - exp(-(d_j*tprime + d_i))*(erf(tprime/l - d_j/2*l) + erf(d_j/2*l)))
# putting in the is_Number stuff forces it to look for a fdiff method for derivative.
return (exp((d_j/2*l)**2)/(d_i+d_j)
*(exp(-d_j*(tprime - t))
*(erf((tprime-t)/l - d_j/2*l)
+ erf(t/l + d_j/2*l))
- exp(-(d_j*tprime + d_i))
*(erf(tprime/l - d_j/2*l)
+ erf(d_j/2*l))))
class erfc(Function):
nargs = 1