I am trying to do an inverse laplace transformation of a relative simple filter, but have found that it does not take much before the transformation takes forever.
I wonder if there is something wrong in my configuration. Windows 7 WinPython-32bit-2.7.6.4 I started to strip out terms in my filter to see when Sympy could compute a result. When I try just the real filter (last calculation), the memory footprint keeps growing. I stopped it at 2G. Any ideas from sympy import * from sympy.abc import s,t from datetime import datetime startTime = datetime.now() H = 1/(258.0*s + 1100000.) inverse_laplace_transform(1/s*H,s,t) print "1) ",datetime.now() - startTime * #my computer takes 0.3sec* startTime = datetime.now() H = 1/(0.07071*s**2 + 258.0*s + 1100000.) inverse_laplace_transform(1/s*H,s,t) print "2) ",datetime.now() - startTime *# 55 minutes and still no solution.... Memory usage: 50Meg* startTime = datetime.now() H = 1/(7.896e-6*s**3 + 0.07071*s**2 + 258.0*s + 1100000.) inverse_laplace_transform(1/s*H,s,t) print "3) ",datetime.now() - startTime #Real filter startTime = datetime.now() H = (0.05*s + 1000.0)**2/(2.209e-10*s**4 + 7.896e-6*s**3 + 0.07071*s**2 + 258.0*s + 1100000.) inverse_laplace_transform(1/s*H,s,t) print "4) ",datetime.now() - startTime -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/sympy. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/26e2175b-3b22-41b7-ad28-0dc94c1960f6%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
