# ChartsAI

> Free browser-based chart makers and printable trackers, designed and built by SupaMakers. Original fictional examples, explicit calculations, and reusable source code.

## Tools
- [Line graph maker](https://www.chartsai.com/line-graph-maker/): 1–5 series, 2–300 ordered points, categorical/numeric/UTC date spacing, PNG/SVG/PDF/CSV export. No guessing or aggregation.
- [Dot plot maker](https://www.chartsai.com/dot-plot-maker/): Frequency dot plots from up to 300 numeric observations. Editable examples, data table, PNG, SVG, PDF and CSV export.
- [Radar chart maker](https://www.chartsai.com/radar-chart-maker/): Compare 1–5 series across 3–10 dimensions with an explicit shared scale. PNG, SVG, PDF and CSV export.
- [Habit tracker printable](https://www.chartsai.com/printables/habit-tracker/): Custom weekly and monthly blank trackers, up to 8 habits, A4 or US Letter landscape PDF.

## Worked examples
- [Chart example library](https://www.chartsai.com/examples/): 50 original fictional datasets with worked interpretations, limits, exact editor links and SVG/PNG/CSV/ECharts JSON downloads.
- [Line graph examples](https://www.chartsai.com/examples/line-graphs/): Eight examples including numeric/time spacing, motion, grouped cumulative frequency and break-even.
- [Dot plot examples](https://www.chartsai.com/examples/dot-plots/): Six stacked frequency plots with means, medians, fractions and distribution shapes.
- [Radar chart examples](https://www.chartsai.com/examples/radar-charts/): Six shared-scale rating profiles. No automatic normalization or composite scores.

## Context
- [Methodology and authorship](https://www.chartsai.com/about/): Calculations, limits, original samples and SupaMakers attribution.
- [Source code and reuse](https://www.chartsai.com/source/): MIT-licensed implementation and downloadable sample data.
- [Privacy](https://www.chartsai.com/privacy/): Inputs and file generation stay in the browser. No cloud saving. Plausible measures aggregate visits and fixed tool events without chart values or habit text.

## Important distinctions
- Numeric and date line graphs preserve interval spacing; missing values and duplicate positions are flagged.
- The worked-example collection is fictional. The separate public-data collection contains attributed UCI datasets under CC BY 4.0; Abalone uses an explicitly labelled 300-row selection for its chart.
- Missing values are not silently converted to zero.
- Radar polygon area is not an overall score.
- The printable tracker is blank; it does not store completion history or provide health advice.
- No accounts, payments or watermarks are required for current tools.
- Search visibility or AI citations are not guaranteed by this file.

## More chart tools and references
- [Histogram maker](https://www.chartsai.com/histogram-maker/): Up to 2,000 observations; explicit equal-width bins and relative frequencies.
- [Box plot maker](https://www.chartsai.com/box-plot-maker/): Raw grouped observations; two quartile methods and two whisker conventions.
- [Scatter plot maker](https://www.chartsai.com/scatter-plot-maker/): Paired observations, descriptive Pearson r and optional least-squares line.
- [Bar chart maker](https://www.chartsai.com/bar-chart-maker/): Grouped, stacked and explicitly normalized 100% bars; horizontal or vertical.
- [Pareto chart maker](https://www.chartsai.com/pareto-chart-maker/): Descending nonnegative categories and cumulative shares.
- [Chart guides](https://www.chartsai.com/guides/): Twenty comparison and method guides with original arithmetic and limitations.
- [Public datasets](https://www.chartsai.com/datasets/): Five UCI resources with complete CSVs, checksums, original author attribution and exact chart selections.
