Matrices

Note

Source: Python-specific — no equivalent in the C# edition.

Todo

Write the matrices section covering:

• A matrix as a list of row lists; indexing with m[row][col]

• Constructing a matrix: literals and helper (e.g. zeros(rows, cols))

• Element-wise addition and scalar multiplication

• Transpose: swapping rows and columns

• Matrix–vector multiplication: each output element is a dot product

• Matrix–matrix multiplication: the general case using nested loops

• Identity matrix and its role

• Code examples for each operation as standalone functions

• Sample runs showing input/output

• Nested-loop complexity discussion (O(n³) for matrix multiply)

• Review questions / exercises