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function C = expand (scalar, S, type)
%GRB.EXPAND expand a scalar into a matrix.
% C = GrB.expand (scalar, S) expands the scalar into a matrix with the
% same size and pattern as S, as C = scalar*spones(S). C has the same
% type as the scalar. C = GrB.expand (scalar, S, type) allows the type of
% C to be specified. The numerical values of S are ignored; only the
% pattern of S is used.
%
% Example:
% A = sprand (4, 4, 0.5)
% C1 = pi * spones (A)
% C2 = GrB.expand (pi, A)
% C3 = GrB.expand (pi, A, 'single complex')
%
% See also GrB.assign.
% SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2022, All Rights Reserved.
% SPDX-License-Identifier: Apache-2.0
if (isobject (scalar))
% do not use gb_get_scalar, to keep it sparse
scalar = scalar.opaque ;
end
if (~gb_isscalar (scalar))
error ('GrB:error', 'first input must be a scalar') ;
end
if (isobject (S))
S = S.opaque ;
end
if (nargin < 3)
type = gbtype (scalar) ;
end
C = GrB (gb_expand (scalar, S, type)) ;
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