function update(cd,r)
%UPDATE  Data update method @TimePeakRespData class

%  Author(s): John Glass
%  Copyright 1986-2004 The MathWorks, Inc.

% RE: Assumes response data is valid (shorted otherwise)
X = cd.Parent.Time;
Y = cd.Parent.Amplitude;
S = size(Y);
nrows = length(r.RowIndex);
ncols = length(r.ColumnIndex);

% Compute Peak Response
Time = zeros(nrows, ncols);
PeakData = zeros(nrows, ncols);
for ct=1:nrows*ncols
   % Allow for scalar expansion, used for input view in LSIM
   cty = min(ct,prod(S(2:end)));
   % Compute peak
   Yabs = abs(Y(:,cty));
   indMax = find(Yabs==max(Yabs));
   indMax = indMax(end);   % to correctly compute Time for first-order-like systems
   Time(ct) = X(indMax);
   PeakData(ct) = Y(indMax,cty);    
end
cd.Time = Time;
cd.PeakResponse = PeakData;