Define the fitting lines values

define_fitting_line_values.c

for(int u=(fitting_order); u>-1;u--){
    if(u==0){
      //this is the last step
      fitting_result+= tmpCoeff[u]; //here no tmpX[t] because we have 0 for x order so x^0=1
    }
    else{
      //tmpCoeff * x^fitting_order - u
      //e.g. tmpCoeff[0]*x  --> fitting-Order = 1 and u = 0
      fitting_result+=tmpCoeff[u]*(pow(scale_ax[t],u));
    }
}