Function model

examples/least_squares_ex.cpp:31–46

We will use this function to generate data. It represents a function of 2 variables and 3 parameters. The least squares procedure will be used to infer the values of the 3 parameters based on a set of input/output pairs.

// and 3 parameters.   The least squares procedure will be used to infer the values of 
// the 3 parameters based on a set of input/output pairs.
double model (
    const input_vector& input,
    const parameter_vector& params
)
{
    const double p0 = params(0);
    const double p1 = params(1);
    const double p2 = params(2);

    const double i0 = input(0);
    const double i1 = input(1);

    const double temp = p0*i0 + p1*i1 + p2;

    return temp*temp;
}

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