Use Cases

The how-to guides answer "how do I draw this chart?". The use cases answer the question a reader usually arrives with: "which figures does my report need, and how do I build them?" Each page takes one field, walks one dataset from the first figure to the last, and ends with the figures composed into a single panel. Every figure links to the chart guide behind it, so the page stays a tour and the guide stays the reference.

The section grows one field at a time: AI, machine learning and NLP, medical and biomedical experiments, demographics and social science, business and product analytics, economics and finance, and seismology and geodesy.

• AI, Machine Learning and NLP

  The figures of a model report, in the order the work happens: training curves, a hyperparameter sweep, a confusion matrix, ROC and precision-recall curves, calibration, per-class scores, feature importance, a leaderboard across benchmarks, and the token statistics of the corpus behind it.

• Medical and Biomedical Experiments

  The figures of a trial report, in the order the questions come: the endpoint per arm with its pairwise tests, the dose-response with intervals, the share at target, the course of the arms over the visits, every subject's own course, who stayed enrolled, the wider marker panel, the safety labs, and the individuals behind a safety signal.

• Demographics and Social Science

  The figures of a population report, from one country to the world: the pyramid then and now, how the young and the old traded places, the fertility and longevity behind it, who arrives and who leaves, which regions age fastest, who gained the most years of life, whether the world is converging, and whether income still buys longevity.

• Business and Product Analytics

  The figures of a product review, in the order the questions come: the revenue mix by plan, the segments that carry it, the channels and their changing ranks, where the funnel leaks, when people sign up, whether the customers who pay stay, and what ships next.

• Economics and Finance

  The figures of an economic report on the major economies: growth and its recessions, which economies are largest and how the order changed, how structure shifts with growth, where inflation bit, what the pandemic year cost, who caught up on income, and the G20 compared on every front at once.

• Seismology and Geodesy

  The figures of an earthquake report on one year of one region: where the seismicity concentrates, what the ground under it looks like, how the magnitudes are distributed, how fast the aftershocks died away, when they arrived, which way the rupture ran, and which instruments were watching.

What each page answers

Page	Act	Questions it answers	Charts it reaches for
AI, Machine Learning and NLP	Training	Did the run converge? Which settings mattered?	LineChart in a Panel, ParallelCoords
	Evaluation	What does the model confuse? Can its confidence be trusted?	Heatmap, LineChart, Histogram, BarChart
	Comparison	Where does it sit among published models, and is the gap real?	BumpChart, DumbbellChart, ScatterChart
	The data	How long are the documents, and what did filtering remove?	RidgelinePlot, LineChart, SankeyChart
Medical and Biomedical Experiments	The primary endpoint	Do the arms differ, by how much, and how many reached the target?	BoxPlot and SwarmPlot in a Panel, BarChart, ViolinPlot
	Over the twelve weeks	When did the arms separate, did every subject follow, and who stayed?	LineChart
	The wider panel	What else moved with the dose, and is the safety signal an arm or a few subjects?	Heatmap, DumbbellChart, SwarmPlot
Demographics and Social Science	The age structure	What does the population look like now and then, how did the shares shift, and what drove it?	PyramidChart in a Grid, StackedAreaChart, LineChart in a Panel
	Who comes, who goes, and where they live	Who arrives and who leaves, and which regions are ageing fastest?	SankeyChart, Heatmap
	The country among the others	Who gained the most years, is the world converging, and do richer countries live longer?	DumbbellChart, RidgelinePlot, ScatterChart
Business and Product Analytics	The revenue	Where does the revenue come from, which segments carry it, and which channels bring the customers?	StackedAreaChart, Treemap, BumpChart
	Acquisition and retention	Where does the funnel leak, when do people sign up, and do the customers who pay stay?	SankeyChart, CalendarHeatmap, Heatmap
	Planning	What ships when, and what is late?	GanttChart
Economics and Finance	Growth	When did the economies shrink, which are the largest, and how does structure change with growth?	LineChart, BumpChart, StackedAreaChart in a Grid
	Prices, incomes and the shocks	Where did inflation bite, what did the pandemic cost, who caught up, and how do the G20 compare at once?	Heatmap, BarChart, DumbbellChart, ParallelCoords
Seismology and Geodesy	Where the earthquakes are	Where does the seismicity concentrate, and what does the ground under it look like?	HexbinChart, ImageChart, BasemapChart, ContourChart
	The sequence	How are the magnitudes distributed, how fast did the aftershocks decay, when did they arrive, and which way did the rupture run?	LineChart on log axes, CalendarHeatmap, RadialChart
	The instruments	Which stations were watching, and how are they spread?	NetworkChart