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function C = GB_spec_resize (A, nrows_new, ncols_new)
%GB_SPEC_RESIZE a MATLAB mimic of GxB_resize
%
% Usage:
% C = GB_spec_resize (A, nrows_new, ncols_new)
% SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2020, All Rights Reserved.
% http://suitesparse.com See GraphBLAS/Doc/License.txt for license.
%-------------------------------------------------------------------------------
% get inputs
%-------------------------------------------------------------------------------
if (nargout > 1 || nargin ~= 3)
error ('usage: C = GB_spec_resize (A, nrows_new, ncols_new)') ;
end
C = GB_spec_matrix (A) ;
c_class = C.class ;
%-------------------------------------------------------------------------------
% do the work via a clean MATLAB interpretation of the entire GraphBLAS spec
%-------------------------------------------------------------------------------
[nrows_old ncols_old] = size (C.matrix) ;
if (ncols_new < ncols_old)
C.matrix = C.matrix (:, 1:ncols_new) ;
C.pattern = C.pattern (:, 1:ncols_new) ;
elseif (ncols_new > ncols_old)
z = GB_spec_zeros ([nrows_old, ncols_new - ncols_old], c_class) ;
C.matrix = [C.matrix z ] ;
C.pattern = [C.pattern (false (nrows_old, ncols_new - ncols_old))] ;
end
if (nrows_new < nrows_old)
C.matrix = C.matrix (1:nrows_new, :) ;
C.pattern = C.pattern (1:nrows_new, :) ;
elseif (nrows_new > nrows_old)
z = GB_spec_zeros ([nrows_new - nrows_old, ncols_new], c_class) ;
C.matrix = [C.matrix ; z ] ;
C.pattern = [C.pattern ; (false (nrows_new - nrows_old, ncols_new))] ;
end
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