integrate (Curve Fitting Toolbox)

Integrate a fit result object

Syntax

```
inty = integrate(fresult,x,x0)
```

Arguments

fresult
A fit result object.

x
The values at which fresult is integrated.

x0
The integration starting point.

inty
A vector of integration values.

`fresult`	A fit result object.
`x`	The values at which `fresult` is integrated.
`x0`	The integration starting point.
`inty`	A vector of integration values.

Description

inty = integrate(fresult,x,x0) integrates the fit result object fresult at the values specified by x starting from x0, and returns the result to inty. The fresult object is a fit result object generated by the fit function. x is a scalar or column vector and inty is the same size as x. x0 is a scalar.

Example

Create a noisy sine wave on the interval [-2, 2].

rand('state',0);
x = (-2*pi:0.1:2*pi)';
y = sin(x) + (rand(size(x))-0.5)*0.2;

Create a custom fit type, and fit the data using reasonable starting values.

ftype = fittype('a*sin(b*x)');
fit1 = fit(x,y,ftype,'startpoint',[1 1]);

Calculate the integral for each value of x starting at -2*pi

```
inty = integrate(fit1,x,x(1));
```

See Also

differentiate, cfit, fit, quad

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