function dB=zrms(z,iidB)
% 
% Call dB=zrms(z,iidB)
% Input:
% z     = either a complex data series (iidB=0 - default) or a data series in dB
% Output:
% dB    = rms value in dB.
%
if nargin<2, iidB=0; end
if iidB==0,
	dB=10*log10(mean(real(z).^2 + imag(z).^2));
else
	dB=10*log10(mean(10.^(z/10)));
end
%
% COPYRIGHT (c) 2008
% 
% Applied Research Laboratories, The University of Texas at Austin
% (ARL:UT)
% All rights reserved.
% 
% This material may be reproduced by or for the U.S. Government
% only. This notice must appear in all copies of this file and its
% derivatives. Further distribution outside the U.S. Government is
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% Director of the Environmental Sciences Laboratory, ARL:UT.
% 
% THIS SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND,
% EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO THE
% IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
% PURPOSE, OR NONINFRINGEMENT.
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