function [Va,Vb]=getPadeApproxHelm(V,ignore)
% Calculate Pade coefficients
%
% FUNCTION getPadeApproxHelm
%
% Author: Rui Yao <ruiyao@ieee.org>
%
% Copyright (C) 2021, UChicago Argonne, LLC. All rights reserved.
%
% OPEN SOURCE LICENSE
% 
% Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
% 
% 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
% 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
% 3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
% 
% 
% ******************************************************************************************************
% DISCLAIMER
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% THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
% WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
% PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY 
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% ***************************************************************************************************
% 
% INPUT
%	V - HE coefficients in power series
%	ignore  - indexes to ignore for the computation
%
% OUTPUT
%	Va - Pade coeffcients on the numerator
%	Vb - Pade coeffcients on the denominator 
% 

N=size(V,2);
m=ceil(N/2);
Nbus=size(V,1);
tag=zeros(Nbus,1);
ignore=ignore(ignore>0&ignore<=Nbus);
tag(ignore)=1;

[Va,Vb]=getPadeApproxVector(V,m,tag);

end