function ans = coeff_drag(V) M = V/1077.4; % Polynomial Fit Coefficient Vector from XESS % P = [28.311839 -129.00579 227.54789 -191.82446 75.580204-10.588229]; % P = [ 41.456022 -201.56995 387.10416 -366.4465 170.68969 -31.214826]; ans = polyval(P,M);