Initializing Matrices or arrays

Creating a matrix of 0s

z1 = zeros(5); % Create a 5-by-5 matrix of zeroes
z2 = zeros(2,3); % Create a 2-by-3 matrix

Creating a matrix of 1s

o1 = ones(5); % Create a 5-by-5 matrix of ones
o2 = ones(1,3); % Create a 1-by-3 matrix / vector of size 3

Creating an identity matrix

i1 = eye(3); % Create a 3-by-3 identity matrix
i2 = eye(5,6); % Create a 5-by-6 identity matrix

Syntax

• Z = zeros(sz,datatype,arraytype)
• X = ones(sz,datatype)
• I = eye(sz,datatype)

Parameters

|Parameter|Details |---|---|---|---|---|---|---|---|---|--- |sz|n (for an n x n matrix) |sz|n, m (for an n x m matrix) |sz|m,n,…,k (for an m-by-n-by-…-by-k matrix) |datatype|‘double’ (default), ‘single’, ‘int8’, ‘uint8’, ‘int16’, ‘uint16’, ‘int32’, ‘uint32’, ‘int64’, or ‘uint64’ |arraytype|‘distributed’ |arraytype|‘codistributed’ |arraytype|‘gpuArray’

Remarks

These functions will create a matrix of doubles, by default.