H2O Machine Learning Cheat Sheet
An H2O machine learning reference for data import, train-validation splits, algorithms, metrics, grid search and model interpretation.
Programming
Frontend, backend, database and software engineering materials.
78 indexed resources
Machine Learning Modelling in R Cheat Sheet
An R modelling reference for data splits, recipe preprocessing, model specifications, workflows, resampling, tuning and final evaluation.
Cartography Cheat Sheet for R Spatial Mapping
A Chinese R cartography reference for spatial layers, thematic symbols, classification, labels, legends, scale and map export review.
mapsf Mapping Cheat Sheet
An R mapsf reference for static thematic maps, classified colors, proportional and category symbols, labels, legends and layout output.
R sf Spatial Data Cheat Sheet for CRS, Joins and Geometry
A practical sf reference for geometry columns, coordinate systems, spatial joins, clipping, validation and export.
Leaflet Mapping Cheat Sheet
An R Leaflet reference for interactive map views, markers, popups, layers, legends, controls and spatial data overlays.
data.table Cheat Sheet
A data.table reference for fast R filtering, calculation, grouping, joins, keys, indexes and reference updates.
Apache Arrow Cheat Sheet for Columnar Data and Type Exchange
A Chinese reference sheet for Apache Arrow covering columnar memory, type systems, tables, conversion and cross-language data exchange.
R and Python Interoperability Cheat Sheet
A practical reference for reticulate environments, object conversion, script calls and reproducible R and Python projects.
R tidyr Data-Wrangling Cheat Sheet
A practical tidyr reference for long and wide tables, splitting and combining fields, missing values, nested data and column names.
Functional Programming with purrr Cheat Sheet
A purrr reference for map functions, input and output types, error handling and data-frame composition in repeated R workflows.
R Date and Time Handling Cheat Sheet
An R date-time reference for parsing, time zones, intervals, periods, durations and date arithmetic.
R Factors Cheat Sheet
An R factors reference for levels, ordering, recoding, missing values, model contrasts and categorical visualization.
R String Processing Cheat Sheet for Cleaning, Splitting and Regex
A practical reference for R string cleaning, splitting, joining, extraction, replacement and regular-expression matching.
Regular Expression Cheat Sheet for Search, Extraction and Replacement
A practical reference for regular-expression character classes, groups, quantifiers, boundaries and replacement workflows.
Shiny for Python Cheat Sheet for Reactive Web Apps
A practical reference for Shiny for Python components, reactive calculations, outputs, asynchronous work and project environments.
Shiny Web Application Cheat Sheet for Reactive UI and Server Logic
A practical reference for R Shiny UI, server logic, reactive expressions, inputs, outputs and pre-deployment checks.
RStudio IDE Cheat Sheet for Projects, Debugging and Package Workflows
A practical RStudio IDE reference for projects, scripts, the console, environment inspection, debugging and package management.