The integral method used in postprocessing Analysis of Curve fitting tool
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Hi, I want to know what is the exact scheme used in integral function in curve fitting tool. I found that in Help that it calls the function int. and int = integrate(fun,x,x0) integrates the cfit object fun at the points specified by the vector x, starting from x0, and returns the result in int. int is a vector the same size as x. x0 is a scalar.
I still dont know which scheme is used to do the integration, like Simpson quadrature or trapezoidal.
Anyone knows that? Thanks in advance :)
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Jon Cherrie
2011년 3월 30일
One of two techniques is used.
- For many of the parametric library models, e.g., exponential, Fourier series, the indefinite integral is computed from the coefficients. This is then evaluated to give the definite integral.
- For non-parametric models and custom equations, the quad function (adaptive Simpson quadrature) is used.
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