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 Author Comment/Response statty 06/13/12 2:17pm Hi, I am trying to integrate a function A(x) over the limits 0, 1000000. The function A(x) is defined as (((no*DR)^no)*(x)^(-no - 1)*Exp[(-no*DR)]/x)/ Gamma[no] However, I am not getting an answer. Below is the input and output I am receiving. Can anyone see where I am making an error or is it due to the large exponential values I am trying to evaluate? Thanks In[36]:= DR = 1000000; WL = 1; pk = 8000; no = (Datarate*Winlength)/pksize + 1 Out[39]= 126 In[40]:= A = (((no*DR)^no)*(x)^(-no - 1)*Exp[(-no*DR)]/x)/ Gamma[no] Out[40]= 8892672075544384807935269331612540238455719520489653351054880\ 9871266041504858795208014573851921542980692850856830998235494729794672\ 1609342263754667588709903137904113486661405129187510678884188160000000\ 0000000000000000000000000000000000000000000000000000000000000000000000\ 0000000000000000000000000000000000000000000000000000000000000000000000\ 0000000000000000000000000000000000000000000000000000000000000000000000\ 0000000000000000000000000000000000000000000000000000000000000000000000\ 0000000000000000000000000000000000000000000000000000000000000000000000\ 0000000000000000000000000000000000000000000000000000000000000000000000\ 0000000000000000000000000000000000000000000000000000000000000000000000\ 0000000000000000000000000000000000000000000000000000000000000000000000\ 0000000000000000000000000000000000000000000000000000000000000000000000\ 0000000000000000000000000000000000000000000000000000000000000000000000\ 000000000000000000/(\ 3776760546677177581176158441781546013327363516317471214972930456918367\ 38419546031851239704677042325753233683 E^126000000 x^128) In[41]:= integrate[A, {x, 0, 1000000}] Out[41]= integrate[ 889267207554438480793526933161254023845571952048965335105488098712660\ 4150485879520801457385192154298069285085683099823549472979467216093422\ 6375466758870990313790411348666140512918751067888418816000000000000000\ 0000000000000000000000000000000000000000000000000000000000000000000000\ 0000000000000000000000000000000000000000000000000000000000000000000000\ 0000000000000000000000000000000000000000000000000000000000000000000000\ 0000000000000000000000000000000000000000000000000000000000000000000000\ 0000000000000000000000000000000000000000000000000000000000000000000000\ 0000000000000000000000000000000000000000000000000000000000000000000000\ 0000000000000000000000000000000000000000000000000000000000000000000000\ 0000000000000000000000000000000000000000000000000000000000000000000000\ 0000000000000000000000000000000000000000000000000000000000000000000000\ 0000000000000000000000000000000000000000000000000000000000000000000000\ 0000000000/(\ 3776760546677177581176158441781546013327363516317471214972930456918367\ 38419546031851239704677042325753233683 E^126000000 x^128), {x, 0, 1000000}] URL: ,

 Subject (listing for 'Problem integrating') Author Date Posted Problem integrating statty 06/13/12 2:17pm Re: Problem integrating Bill Simpson 06/14/12 12:11pm Re: Re: Problem integrating statty 06/15/12 08:02am Re: Re: Re: Problem integrating Bill Simpson 06/15/12 11:37am Re: Re: Re: Re: Problem integrating statty 06/17/12 08:15am
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