function [V,dVda,dVdb,dVdc]=fittingV_val(a0,b0,c0)
load('FittingParamV.mat', 'b_reg')
%  V=zeros(size(a0));
% dVda=zeros(size(a0));
% dVdb=zeros(size(a0));
% dVdc=zeros(size(a0));

[y,da,db,dc]=derivativeFromFitting(a0,b0,c0,b_reg);
V=y.*(1+a0+b0+c0>0)+1.*(1+a0+b0+c0<=0);
dVda = da.*(1+a0+b0+c0>0);
dVdb = db.*(1+a0+b0+c0>0);
dVdc = dc.*(1+a0+b0+c0>0);
end