Re: numerical integration
- To: mathgroup at smc.vnet.net
- Subject: [mg40554] Re: numerical integration
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Thu, 10 Apr 2003 03:36:48 -0400 (EDT)
- Organization: Universitaet Leipzig
- References: <b70ntk$9jb$1@smc.vnet.net>
- Reply-to: kuska at informatik.uni-leipzig.de
- Sender: owner-wri-mathgroup at wolfram.com
Hi,
something like
<< NumericalMath`NIntegrateInterpolatingFunct`
ip=Interpolation[data][t];
Integrate[ip,{t,0,1800}]
Regards
Jens
C B wrote:
>
> I have data which looks like ..
>
> data = {{0,4.308115176},{180,11.83807029},{320,9.819597477},{380,
> 9.003587475},{420,9.646700866},{540,9.003587475},{660,
> 8.601966768},{720,8.090496405},{780,7.49290292},{900,7.536283436},{1020,7.08
> 6922454},{1080,6.876137912},{1140,
> 6.580371983},[1200,6.430040607},{1320,6.300111915},{1380,
> 6.077755024},{1500,6.101258682},{1680,5.96360292},{1800,5.821356082}}
>
> X value is time (sec)
> Y value is gas readings
> I could plot the XY plot but I need to get area under the curve. For that I
> tried
> <<NumericalMath`NIntegrateInterpolatingFunct`
> Interpolation
> NIntegrateInterpolatingFunction
>
> But I am just not being able to figure out the exact sytax. Does anyone have
> any experience with this kind of problem?