NumPy

0%
Coding
Theory
Quiz

    Array Creation Dtypes

    • Integer Range With np.arange

      Junior

    • Nested List to Typed 2-D Array

      Junior

    • Checkerboard Matrix Via Slicing

      Junior

    • Interior Evenly Spaced Points

      Junior

    • Build an Identity Matrix

      Junior

    • Framed Border Matrix

      Junior

    • Checkerboard via np.tile

      Mid

    • Coordinate Matrices With meshgrid

      Mid

    • Truncate Floats With astype

      Mid

    • Report Array Metadata Tuple

      Mid

    • Sub-Diagonal Matrix With np.diag

      Mid

    • Diagonal Stripe Gradient

      Mid

    • Structured RGBA dtype Array

      Senior

    • Structured Meshgrid Over Unit Square

      Senior

    • Convert C-Contiguous Array to Fortran Order

      Senior

    • View vs Copy Semantics

      Senior

    Indexing Slicing Boolean Masking

    • Clip Negatives to Zero With np.where

      Junior

    • Filter Array With Boolean Mask

      Junior

    • Gather Elements by Index

      Junior

    • Slice Every Second Row's Last Two Columns

      Junior

    • Non-Zero Indices With np.nonzero

      Junior

    • Reverse a 1-D Array With Slicing

      Junior

    • Boolean Mask Multi-Condition Filter

      Mid

    • In-Place Masked Negation

      Mid

    • Paired Fancy Index Gather

      Mid

    • Count Elements Above Threshold

      Mid

    • Threshold Coordinates With np.argwhere

      Mid

    • Zero the Inner Region

      Mid

    • Cross-Product Submatrix With np.ix_

      Senior

    • Piecewise Category Codes With np.select

      Senior

    • Per-Row Gather With np.take_along_axis

      Senior

    Broadcasting Vectorization

    • Row-Wise Bias Broadcast Add

      Junior

    • Multiplication Table via Broadcasting

      Junior

    • Column-Wise Broadcast Scaling

      Junior

    • Outer Sum Table With Broadcasting

      Junior

    • Column Z-Score Standardization

      Mid

    • Row-Mean Centering With keepdims

      Mid

    • Per-Column Min-Max Scaling

      Mid

    • One-Hot via Equality Broadcast

      Mid

    • Vectorize Cauchy Matrix With Broadcasting

      Mid

    • Weight Image Channels by Broadcasting

      Mid

    • Vectorized Pairwise Distance Matrix

      Senior

    • Squared Distances via Gram Trick

      Senior

    • Sample Covariance via Broadcasting

      Senior

    Aggregations Reductions Axis Operations

    • Column Sums Without a Loop

      Junior

    • Row-Wise Mean Reduction

      Junior

    • Column Peak-to-Peak Range

      Junior

    • Count Non-Zero Entries Per Column

      Junior

    • Per-Row Argmax Indices

      Mid

    • Coordinates of the Largest Element

      Mid

    • Moving Average via np.cumsum

      Mid

    • NaN-Aware Column Means

      Mid

    • L1 Row Normalization With keepdims

      Mid

    • Column-Wise Weighted Average

      Mid

    • Column Medians and Percentiles

      Mid

    • Block-Sum via np.add.reduceat

      Senior

    • Grouped Mean With np.bincount

      Senior

    • Running Maximum With accumulate

      Senior

    Reshaping Stacking Manipulation

    • Repeat Each Element With np.repeat

      Junior

    • Reshape 1-D Array Into Matrix

      Junior

    • Stack Two Arrays As Rows

      Junior

    • Zero Border With np.pad

      Junior

    • Flatten Matrix to 1-D Copy

      Junior

    • Transpose a 2-D Array

      Junior

    • Split Array Into Near-Equal Parts

      Mid

    • Cyclic Array Shift With roll_array

      Mid

    • Rotate 2-D Array by k*90 Degrees

      Mid

    • Stack 2-D Arrays Into 3-D Tensor

      Mid

    • HWC to CHW Layout Conversion

      Mid

    • Interleave Two Arrays Elementwise

      Mid

    • Drop A Column From 2-D Array

      Mid

    • Reflect-Pad a 1-D Array

      Senior

    • Assemble 2x2 Block Matrix

      Senior

    • Insert Zeros By Strided Assignment

      Senior

    Linear Algebra

    • Normalize Rows to Unit L2 Length

      Junior

    • Matrix Product With @

      Junior

    • Matrix Trace With np.trace

      Junior

    • Matrix Determinant With np.linalg.det

      Junior

    • Outer Product of Two Vectors

      Junior

    • Solve a Linear System

      Mid

    • Matrix Inverse With np.linalg.inv

      Mid

    • Matrix Rank With matrix_rank

      Mid

    • Vector Projection Onto u

      Mid

    • Matrix Power With np.linalg.matrix_power

      Mid

    • Vector And Matrix Norms

      Mid

    • Best-Fit Line With lstsq

      Senior

    • Gram-Schmidt Orthonormalization

      Senior

    • Rank-k SVD Approximation

      Senior

    • Batched Matmul With einsum

      Senior

    Sorting Searching Set Operations

    • Non-Destructive Ascending Sort

      Junior

    • Row-Wise Ascending Sort

      Junior

    • Argsort Permutation Indices

      Junior

    • Sorted Distinct Values

      Junior

    • Count Non-Zero Elements

      Junior

    • Distinct Values and Their Counts

      Mid

    • Top-K Largest via argpartition

      Mid

    • Sorted Intersection of Two Arrays

      Mid

    • Sort 2-D Rows by Key Column

      Mid

    • Boolean Membership Mask

      Mid

    • Most Frequent Value With Tie-Break

      Mid

    • Vectorized Insertion Indices

      Mid

    • Multi-Key Row Sort With lexsort

      Senior

    • Order-Preserving Array Dedup

      Senior

    • Bucketize Values With searchsorted

      Senior

    • First Element Exceeding Threshold

      Senior

    Random Statistics Numerical Methods

    • Seeded Integer Sampling With default_rng

      Junior

    • Min-Max Normalize a 1-D Array

      Junior

    • Z-Score Standardization

      Junior

    • Winsorize With np.clip

      Junior

    • Sanitize Non-Finite Array Values

      Junior

    • Simple Moving Average With np.convolve

      Mid

    • Seeded Row Shuffle

      Mid

    • Per-Bin Histogram Counts

      Mid

    • Bin Values With np.digitize

      Mid

    • Grouped Sums With bincount

      Mid

    • Linear Interpolation With np.interp

      Mid

    • Pearson Correlation Matrix

      Senior

    • IQR Outlier Mask

      Senior

    • Polynomial Fit and Evaluate

      Senior

    • Trapezoidal Rule Integration

      Senior

    • Monte Carlo Pi Estimation

      Senior