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    %% Moving Sum of Vector with |NaN| Elements
% Compute the three-point centered moving sum of a row
% vector containing two |NaN| elements.
A = [4 8 NaN -1 -2 -3 NaN 3 4 5];
M = movsum(A,3)

%%
% Recalculate the sum, but omit the |NaN| values.  When
% |movsum| discards |NaN| elements, it takes the sum over
% the remaining elements in the window.
M = movsum(A,3,'omitnan')