2026a
# zeros
创建全零数组
# 语法
X = zeros([T] , dims::Tuple)
X = zeros([T] , dims...)
# 说明
X = zeros([T] , dims::Tuple) 返回默认类型为 Float64（可指定其他类型），维度为以元组 dims 为维度的全零矩阵。示例
X = zeros([T] , dims...) 返回默认类型为 Float64 （可指定其他类型），维度为 dims...（输入参数全为非负整数）的全零矩阵。示例
# 示例
零矩阵
创建一个由零值组成的 4×4 矩阵。
X = zeros(4,4)
X = 4×4 Matrix{Float64}:
0.0 0.0 0.0 0.0
0.0 0.0 0.0 0.0
0.0 0.0 0.0 0.0
0.0 0.0 0.0 0.0
由零组成的三维数组
创建一个由零组成的 2×3×4 数组。
X = zeros(2,3,4);
size(X)
(2, 3, 4)
根据现有数组克隆大小
创建一个与现有数组大小相同的零数组。
A = [1 4; 2 5; 3 6];
sz = size(A);
X = zeros(sz)
3×2 Matrix{Float64}:
0.0 0.0
0.0 0.0
0.0 0.0
将前两行代码合并为一行是一种常见的模式：
X = zeros(size(A));
根据现有数组克隆复/实性
创建一个标量 0，该标量像现有数组一样复杂，而不是实值。
首先，创建一个复数向量。
p = [1+2im 3im];
创建一个像 p 一样复数的标量 0。
zeros(eltype(p),1)
1-element Vector{Complex{Int64}}:
0 + 0im
从现有数组克隆稀疏性数组
创建一个 10×10 的稀疏矩阵。
using TyMath
p = spzeros(10,10);
p[end] = pi;
10×10 SparseMatrixCSC{Float64, Int64} with 1 stored entry:
⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅
⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅
⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅
⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅
⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅
⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅
⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅
⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅
⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅
⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ 3.14159
创建一个像 p 一样稀疏的 2×3 零矩阵。
spzeros(eltype(p),(2,3))
2×3 SparseMatrixCSC{Float64, Int64} with 0 stored entries:
⋅ ⋅ ⋅
⋅ ⋅ ⋅
从现有数组克隆大小和数据类型
创建一个 2×3 的 8 位无符号整数数组。
p = UInt8.([1 3 5; 2 4 6])
2×3 Matrix{UInt8}:
0x01 0x03 0x05
0x02 0x04 0x06
创建一个大小和数据类型与 p 相同的零数组。
X = zeros(eltype(p),size(p))
2×3 Matrix{UInt8}:
0x00 0x00 0x00
0x00 0x00 0x00
eltype(X)
UInt8
指定零数据类型
创建一个由整型零值组成的 2×3 矩阵。
X = zeros(Int,2,3)
X = 2×3 Matrix{Int64}:
0 0 0
0 0 0
创建一个由复数类型零值组成的 2×3 矩阵。
X = zeros(Complex,(2,3))
X = 2×3 Matrix{Complex}:
0+0im 0+0im 0+0im
0+0im 0+0im 0+0im
# 输入参数
[T=Float64] - 零矩阵类型Flaot64(默认) | Float32 | Float16 | Int128 | Int64 | Int32 | Int16 | Int8 | UInt8 | UInt16 | UInt32 | UInt64 | UInt128 | Complex | Bool | UInt128 | UInt64 | UInt32 | UInt16 | Rational
zeros() 第一个参数非数值类型时，默认零矩阵为 Float64 型，当指定数值类型时，会创建指定类型的零矩阵，例如：
X = zeros(Bool,2,3)
X = 2×3 Matrix{Bool}:
0 0 0
0 0 0
dims - 零矩阵维度非负整数
dims 可为 Tuple（元组）类型 ； 或输入一系列非负整数，指定每个维度的大小。
- 如果任何维度大小为 0，则为空矩阵；
- 如果任何维度大小为负整数或非整数值，则会报错。
数据类型： Int64 | Int32 | Int16 | Int128 | UInt