GetApproximationLine

Calculation of approximation straight line

int     GetApproximationLine(
        const double    *dataX,
        const double    *dataY,
        const int               dataNum,
        double          *coefficient
)

Parameters

*dataX	Coordinates X of points
*dataY	Coordinates Y of points
dataNum	Count of points
*coefficient	Straight line element(measurement result)

Return Value

NORMAL(0): Successful completion

Otherwise: Unsuccessful completion

Description

Calculate the approximation straight line based on the input point, and output the element.

The least square method is used for the approximation.

Output is a,b,c as for a straight line expression ax + by + c = 0.

It is stored in coefficient[0], coefficient[1], and coefficient [2] respectively.

Notes

Returns ERR_PARAM when the point sequence number is less than one.

When two or more straight lines can be calculated, outputs one of them.