MATLAB学习(2)——zeros
语法:
1 X = zeros % 返回标量0 2 X = zeros(n) % 返回零的n×n矩阵 3 X = zeros(sz1,...,szN) % 返回sz1-by -...- by-szN零数组,其中sz1,...,szN表示每个维度的大小。例如,zeros(2,3)返回一个2×3的矩阵。 4 X = zeros(sz) % 返回一个零数组,其中大小矢量sz定义大小(X)。例如,zeros([2 3])返回一个2×3的矩阵。 5 X = zeros(___,typename) % 返回数据类型为typename的零数组。例如,zeros('int8')会返回一个标量,即8位整数0.您可以使用前面语法中的任何输入参数。 6 X = zeros(___,'like',p) % 返回像p这样的零数组;也就是说,与p相同的数据类型(类),稀疏性和复杂性(真实或复杂)。你可以指定typename或'like',但不能同时指定。
Examples
X = zeros(4) %Create a 4-by-4 matrix of zeros.
X = 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
X = zeros(2,3,4); %Create a 2-by-3-by-4 array of zeros. size(X)
ans = 2 3 4
A = [1 4; 2 5; 3 6]; %Create an array of zeros that is the same size as an existing array. sz = size(A); X = zeros(sz)
%X = zeros(size(A));
X = 0 0 0 0 0 0
X = zeros(1,3,'uint32') %Create a 1-by-3 vector of zeros whose elements are 32-bit unsigned integers.
X = 1×3 uint32 row vector 0 0 0
class(X)
ans = uint32
%Create a scalar0
that is complex like an existing array instead of real valued.
p = [1+2i 3i]; %First, create a complex vector.
X = zeros('like',p) Create a scalar 0
that is complex like p
.
X = 0.0000 + 0.0000i
p = sparse(10,10,pi); %Create a 10-by-10 sparse matrix.
X = zeros(2,3,'like',p) %Create a 2-by-3 matrix of zeros that is sparse like p
.
X = All zero sparse: 2×3