if( x

int n1, n2, n3, n4, n5, n6, n7, n8, n9, n10;

x_data.GetMinMax( x1, x10, &n1, &n10);

x2 = x1 + (x10 - x1)/36;

y1 = y_data[n1];

y10 = y_data[n10];

vector vd1;

vd1 = abs( x_data - x2 );

double xta1, xtb1;

vd1.GetMinMax( xta1, xtb1, &n2 );

y2 = y_data[n2];

x_data.GetMinMax( x1, x10, &n1, &n10);

x3 = x1 + (x10 - x1)/18;

y1 = y_data[n1];

y10 = y_data[n10];

vector vd2;

vd2 = abs( x_data - x3 );

double xta2, xtb2;

vd2.GetMinMax( xta2, xtb2, &n3 );

y3 = y_data[n3];

x_data.GetMinMax( x1, x10, &n1, &n10);

x4 = x1 + (x10 - x1)/9;

y1 = y_data[n1];

y10 = y_data[n10];

vector vd3;

vd3 = abs( x_data - x4 );

double xta3, xtb3;

vd3.GetMinMax( xta3, xtb3, &n4 );

y4 = y_data[n4];

x_data.GetMinMax( x1, x10, &n1, &n10);

x5 = x1 + (x10 - x1)/6;

y1 = y_data[n1];

y10 = y_data[n10];

vector vd4;

vd4 = abs( x_data - x5 );

double xta4, xtb4;

vd4.GetMinMax( xta4, xtb4, &n5 );

y5 = y_data[n5];

x_data.GetMinMax( x1, x10, &n1, &n10);

x6 = x1 + (x10 - x1)/4;

y1 = y_data[n1];

y10 = y_data[n10];

vector vd5;

vd5 = abs( x_data - x6 );

double xta5, xtb5;

vd5.GetMinMax( xta5, xtb5, &n6 );

y6 = y_data[n6];

x_data.GetMinMax( x1, x10, &n1, &n10);

x7 = x1 + (x10 - x1)/3;

y1 = y_data[n1];

y10 = y_data[n10];

vector vd6;

vd6 = abs( x_data - x7 );

double xta6, xtb6;

vd6.GetMinMax( xta6, xtb6, &n7 );

y7 = y_data[n7];

x_data.GetMinMax( x1, x10, &n1, &n10);

x8 = x1 + (x10 - x1)/2;

y1 = y_data[n1];

y10 = y_data[n10];

vector vd7;

vd7 = abs( x_data - x8 );

double xta7, xtb7;

vd7.GetMinMax( xta7, xtb7, &n8 );

y8 = y_data[n8];

x_data.GetMinMax( x1, x10, &n1, &n10);

x9 = x1 + (x10 - x1)/1.5;

y1 = y_data[n1];

y10 = y_data[n10];

vector vd8;

vd8 = abs( x_data - x9 );

double xta8, xtb8;

vd8.GetMinMax( xta8, xtb8, &n9 );

y9 = y_data[n9];

//Code to be executed to initialize parameters

I want to know what exactly the question is that you want to ask?

soory i have problem how to fit piecewise regression throuh origin?