95% area under data set

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Max Bernstein 2017-2-14

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评论： Star Strider 2017-2-15

Hello,

I have a set of data representing current as a function of angles as shown in the attached figure. The data sets I have are not Gaussian and I would like to find the 95% area under the curve along with the x1 and x2 position to add to the plot, but I do not have the stat or curve fit toolbox. How can I do this in Matlab?

Thanks

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Star Strider 2017-2-14

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Without your data, I can only outline the approach I would use. First, use the cumtrapz function to do the integration. Normalise the area to 1 by dividing the result of your cumtrapz call by the last value of the vector. Then use the interp1 function to calculate the value of the 2.5% and 97.5% values. Those will be the limits of the central 95%.