linReg property
Calculate linear regression of a set of points: Returns a list of form y =
mx + b, with linearReg[0]
being m and linearReg[1]
being b.
Implementation
List<num> get linReg {
var slopevalue = <num>[];
var avgX = x.mean;
var avgY = y.mean;
var Sx = x.stdDev;
var Sy = y.stdDev;
num r = 0;
num m = 0;
//calculate r; ignore
for (var n = 0; n < x.length; n++) {
r += ((x[n] - avgX) * (y[n] - avgY));
}
r /= ((Sx * Sy)*(x.length-1));
//end r calculation
m = r*(Sy/Sx);
slopevalue.add(m);
slopevalue.add(avgY - m*(avgX));
return slopevalue;
}