www.gusucode.com > matlab 案例源码 matlab代码程序 > matlab/PreallocateStorageForNonzerosInSparseMatrixExample.m
%% Preallocate Storage in Sparse Matrix % Create a sparse matrix with |10| nonzero values, but which has space % allocated for |100| nonzero values. % Copyright 2015 The MathWorks, Inc. S = sparse(1:10,1:10,5,20,20,100); N = nnz(S) %% % N_alloc = nzmax(S) %% % The |spalloc| function is a shorthand way to create a sparse matrix with % _no_ nonzero elements but which has space allotted for some number of % nonzeros.