NIntegrate with AdaptiveMonteCarlo gives different results
- To: mathgroup at smc.vnet.net
- Subject: [mg123328] NIntegrate with AdaptiveMonteCarlo gives different results
- From: valentina <fuchi8 at tiscali.it>
- Date: Thu, 1 Dec 2011 08:03:37 -0500 (EST)
- Delivered-to: l-mathgroup@mail-archive0.wolfram.com
Hello everybody,
I am dealing with a three dimensional integral and I am using
NIntegrate. Searching the web I found out that the best method is the
AdaptiveMonteCarlo, which also speed up the calculation.
this is the integral, no particular singular points:
test[d_] := (0.5 NIntegrate[(compnx[x, y, z, d] +
compny[x, y, z, d] + compnz[x, y, z, d]), {z, -R - d/2,
R + d/2}, {x, -R, R}, {y, -R, R},
Method -> "MultiDimensionalRule"]*hc) // Timing
so I want to calculate it for different values of the parameter d, but
for example if I successively calculate it for d=4 i get two different
results which differs of about 30-50 MeV.
Does anyone know if it is a bug or how could I fix it?
Thanks in advance.