#numpy

• 27 Feb 2024 · Study

  NumPy · Random numbers

  The Generator API (default_rng), seeding for reproducibility, distributions, shuffling, and sampling without replacement.

• 22 Feb 2024 · Study

  NumPy · Linear algebra

  Matrix multiplication with @, solving linear systems, inverse vs solve, determinants, norms, and eigen decomposition.

• 20 Feb 2024 · Study

  NumPy · Vectorisation

  Replacing Python loops with whole-array operations and ufuncs, with a timing comparison and the axis argument for reductions.

• 15 Feb 2024 · Study

  NumPy · Broadcasting

  The broadcasting rules that let arrays of different shapes combine, and three uses: centring columns, outer products, and pairwise distances.

• 12 Feb 2024 · Study

  NumPy · Boolean and fancy indexing

  Selecting with boolean masks and integer arrays, combining conditions with & and |, np.where, and why these return copies.

• 8 Feb 2024 · Study

  NumPy · Indexing and slicing

  Multi-dimensional indexing with a[i, j], slicing rows and columns, and the most important rule: basic slices are views, not copies.

• 5 Feb 2024 · Study

  NumPy · dtypes

  NumPy dtypes (int32, int64, float32, float64, bool), memory per element, casting with astype, and silent integer overflow.

• 1 Feb 2024 · Study

  NumPy · ndarray basics

  The ndarray: creating arrays, shape, ndim, size, reshape, and why one NumPy array beats a list of floats.