function Vr = get_vr(vr_array,str_vr,zoom)
if zoom==1
    if str_vr=="0.35"
        Vr = 0.200:0.0001:0.208;
        return;
    elseif str_vr=="0.50"
        Vr = 0.170:0.0001:0.208;
        return;
    elseif str_vr=="0.65"
        Vr = 0.150:0.0001:0.215;
        return;
    else
        Vr = 0.150:0.0001:0.21;
        return;
    end
else
    Vr=vr_array;
end
end