Use when asked to calculate statistical power, determine sample size, or plan experiments for hypothesis testing.
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15,688 skills
Perform statistical hypothesis testing, regression analysis, ANOVA, and t-tests with plain-English interpretations...
Combine multiple images into sprite sheets with customizable grid layouts and generate CSS sprite maps for web development.
Generate audio tones, noise, DTMF signals, and simple sound effects programmatically. Export to WAV or MP3 format.
Guide for creating effective skills. Use when building new skills or updating existing ones that extend ChatGPT with...
Analyze text sentiment (positive/negative/neutral) with confidence scores, emotion detection, and visualization....
Use when asked to create publication-ready scientific figures, charts for research papers, or academic visualizations.
Create interactive Sankey diagrams for flow visualization from CSV, DataFrame, or dict data. Supports node/link...
Calculate ROI for marketing campaigns, investments, and business decisions. Includes break-even analysis, payback...
Generate professional PDF resumes from structured data or JSON. Multiple templates, ATS-friendly output, and...
Generate professional PDF/HTML reports with charts, tables, and narrative from data. Supports templates, branding,...
Test, debug, and explain regular expressions. Visualize matches, generate patterns from examples, and convert...
Extract vendor, date, items, amounts, and total from receipt images using OCR and pattern matching with structured...
Calculate readability scores (Flesch-Kincaid, Gunning Fog, SMOG) and grade levels for text. Analyze writing...
Generate QR codes with URLs and UTM tracking. Exports PNG/SVG with captions. Use for single codes, batch generation,...
Use when asked to scan, decode, read, or extract data from QR codes or barcodes in images.
Split audio files by detecting silence gaps. Auto-segment podcasts into chapters, remove long silences, and export...
Generate pivot tables from CSV/Excel with aggregations, filters, and automatic chart creation.
Create photo collages with grid layouts, custom arrangements, borders, and backgrounds. Combine multiple images into...
Standardize and format phone numbers with international support, validation, and multiple output formats.
Comprehensive PDF manipulation - merge, split, rotate, extract pages, add watermarks, compress, and encrypt PDFs...
Generate secure passwords and passphrases with customizable rules. Check password strength, generate bulk passwords,...
Detect anomalies and outliers in datasets using statistical and ML methods. Use for data cleaning, fraud detection,...
Generate organizational hierarchy charts from CSV, JSON, or nested data. Supports multiple layouts, department...