idamnjanovic@1: function x = add_dc(y,dc,columns)
idamnjanovic@1: %ADD_DC Add DC channel to signals.
idamnjanovic@1: %   X = ADD_DC(Y,DC) adds the specified DC value to the (possibly
idamnjanovic@1: %   multi-dimensional) signal Y, returning the result as X. DC should be a
idamnjanovic@1: %   scalar value.
idamnjanovic@1: %
idamnjanovic@1: %   X = ADD_DC(Y,DC,'columns') where Y is a 2D matrix and DC is an array of
idamnjanovic@1: %   length size(Y,2), treats the columns of Y as individual 1D signals, 
idamnjanovic@1: %   adding to each one the corresponding DC value from the DC array. X is
idamnjanovic@1: %   the same size as Y and contains the resulting signals.
idamnjanovic@1: %
idamnjanovic@1: %   See also REMOVE_DC.
idamnjanovic@1: 
idamnjanovic@1: %  Ron Rubinstein
idamnjanovic@1: %  Computer Science Department
idamnjanovic@1: %  Technion, Haifa 32000 Israel
idamnjanovic@1: %  ronrubin@cs
idamnjanovic@1: %
idamnjanovic@1: %  April 2009
idamnjanovic@1: 
idamnjanovic@1: 
idamnjanovic@1: if (nargin==3 && strcmpi(columns,'columns')), columns = 1;
idamnjanovic@1: else columns = 0;
idamnjanovic@1: end
idamnjanovic@1: 
idamnjanovic@1: if (columns)
idamnjanovic@1:   x = addtocols(y,dc);
idamnjanovic@1: else
idamnjanovic@1:   x = y + dc;
idamnjanovic@1: end
idamnjanovic@1: 
idamnjanovic@1: 
idamnjanovic@1: