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integrating area under a curve
I have a bunch of data that I plot and I need to integrate a specific area under the curve. The function trapz is great, but I would like to just integrate under a specific peak. Can Matlab tell me the exact x and y ranges for particular peaks?
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 Tara
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1/27/2011 8:39:03 AM |
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"Tara" wrote in message <ihrav7$c8f$1@fred.mathworks.com>...
> I have a bunch of data that I plot and I need to integrate a specific area under the curve. The function trapz is great, but I would like to just integrate under a specific peak. Can Matlab tell me the exact x and y ranges for particular peaks?
Let me ask it differently: I know the x values that I want, corresponding to the peak (say from 6-8): (startindex=find(x==6); endindex=find(x==8); then desiredx=x(startindex:endindex);
But now I need the corresponding y values so that I can use the trapz function. Thanks!
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Tara
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1/27/2011 9:46:03 AM
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"Tara" wrote in message <ihrav7$c8f$1@fred.mathworks.com>...
> I have a bunch of data that I plot and I need to integrate a specific area under the curve. The function trapz is great, but I would like to just integrate under a specific peak. Can Matlab tell me the exact x and y ranges for particular peaks?
Dear Tara,
I have the same problem in Simulink Model. I have a digital signal and I would like to find out the area under the curves and I want to know the peak values.
Is there any way to find out?
It will be very useful for me.
Prashant
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 sandhi.prashant (130)
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10/28/2011 6:17:15 AM
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