Arrays and Matrices

Topics covered

• Difference between scalars, vectors and matrices
• Use of colons for vectors and matrices
• linspace(), logspace(), magic(), rand(), zeros(), ones()
• Use of square brackets and semi-colons
• Transposing arrays, fliplr(), flipud()

Topics covered

• Indexing individual elements
• Indexing rows
• Indexing columns
• Indexing groups of elements
• You cannot index out of bounds

Topics covered

• Element-wise operators: .*, ./, .^
• Visual example of array operations
• Difference between array and matrix operations
• Example where both would work (square matrices)

Topics covered

• Addition/subtraction, transposition, scalar multiplication, matrix multiplication
• Matrix functions: eye(), inv() or A^-1, det(), cross(), dot(), repmat()

Topics covered

• Example on solving a system of linear equations
• Using the left division operator \ for AX = B