Datasets
Soybean (Large)
UCI Machine Learning Repository
Crop symptom descriptors and disease labels for investigating categorical agricultural classification.
Investigate How stable is soybean-disease classification when sparse classes and missing fields are reported separately?
Listing reviewed · source terms apply↗
Software
Sparse
Upstream project repository
Sparse multidimensional array representations and operations for scientific Python.
Investigate Do sparse tensor reductions match dense arithmetic across duplicate coordinates and fill values?
Listing reviewed · source terms apply↗
Methods
Sparse eigenvalue problems with ARPACK
SciPy documentation
A tutorial on extracting a few eigenpairs from sparse operators, including shift-invert mode and matrix-free interfaces.
Investigate How do the requested spectrum region and tolerance affect convergence and residuals for a sparse matrix with known eigenvalues?
Listing reviewed · source terms apply↗
Methods
Spatial Data Structures and Algorithms (scipy.spatial)
SciPy documentation
A computational-geometry reference covering Delaunay triangulations, convex hulls, Voronoi structures and degenerate point configurations.
Investigate Which geometric invariants remain valid when the input contains duplicates or nearly coplanar points?
Listing reviewed · source terms apply↗
Software
specutils
Upstream project repository
Representations and analysis operations for astronomical spectra.
Investigate Do line-flux estimates agree with analytic integrals as the spectral sampling grid changes?
Listing reviewed · source terms apply↗
Software
spreg
Upstream project repository
Spatial regression estimators and diagnostics for econometric analysis.
Investigate How do estimated spatial-lag parameters behave under a fixed synthetic model and weight matrix?
Listing reviewed · source terms apply↗
Original examples
Stable log-sum-exp on overflowing inputs
Executable Science local pilot drafts
Compare naive exponentiation with a shifted log-sum-exp calculation and a 70-digit Decimal reference on three fixed large inputs.
Investigate Can a shifted calculation retain an accurate finite result when direct exponentiation overflows?
Listing reviewed · source terms apply↗
Original examples
Stationary-distribution calibration for a two-state chain
Executable Science local pilot drafts
Compare a known stationary distribution with matrix iteration and occupation frequencies from a deterministic-seed Markov-chain simulation.
Investigate Do the two computational routes approach the same analytical stationary distribution?
Listing reviewed · source terms apply↗
Datasets
Statlog (Landsat Satellite)
UCI Machine Learning Repository
Satellite spectral features and land-cover labels for auditing spatial classification benchmarks.
Investigate Does spatial grouping materially alter Landsat classification error and classwise recall?
Listing reviewed · source terms apply↗
Datasets
Statlog (Shuttle)
UCI Machine Learning Repository
Spacecraft-related measurements for examining extreme class imbalance in fault classification.
Investigate How do minority-class recall and calibration differ from aggregate shuttle classification accuracy?
Listing reviewed · source terms apply↗
Datasets
Statlog (Vehicle Silhouettes)
UCI Machine Learning Repository
Vehicle-shape descriptors for studying invariance in compact image-derived feature spaces.
Investigate How much does feature normalization affect vehicle-silhouette classification on a frozen split?
Listing reviewed · source terms apply↗
Software
StatsForecast
Upstream project repository
Statistical forecasting models and utilities for collections of time series.
Investigate How do fixed classical forecasting methods compare on held-out synthetic seasonal regimes?
Listing reviewed · source terms apply↗
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