Learning Julia

Different operation on matrices

Just like arrays, there are different operations that can be performed on matrices:

# a 3x2 matrixjulia> A = [2 4; 8 16; 32 64]3×2 Array{Int64,2}: 2   4 8  1632  64

We can change the shape of a matrix using the reshape() function:

julia> reshape(A,2,3)2×3 Array{Int64,2}:2  32  168   4  64

This converts a 3x2 matrix to a 2x3 matrix:

# same could be achieved using the transpose functionjulia> transpose(A)2×3 Array{Int64,2}:2  32  168   4  64

Operations such as addition and multiplication are also valid, with some restrictions:

julia> B = [1 1 2; 3 5 8]2×3 Array{Int64,2}:1  1  23  5  8# adding both the matricesjulia> transpose(A)+B2×3 Array{Int64,2}: 3  9 34 7 21 72

This operation is performed successfully. Now, let’s try the multiplication ...