Convert values into checked SVG geometry
See this course’s project requirements
A local SVG bar chart generated from fictional library-use rows, with checked numeric scale, visible labels, matching data table and a text summary.
Keep your working files in your own notebook or software. Save a private description, checklist, and work link in My Proof.
What to include
- State the chart question, validated row contract, and limits of the fictional dataset.
- Produce a checked common-scale geometry table with value, height, and top coordinate.
- Create namespaced SVG shapes and labels from one validated source and inspect their rendered agreement.
- Provide and reconcile the chart name, fuller text summary, and structured data table.
- Retain a baseline/change matrix proving every represented value stays synchronized.
- Deliver the chart with independent arithmetic and separate data, rendered, and assistive test statuses.
Review and revise
Use these criteria to check your work and choose what to improve.
- The implementation or declared simulation follows the supplied contract and retains inspectable original inputs.
- Normal, boundary and rejected cases are recorded with expected versus observed results.
- The changed case has a correct explanation and does not rely on hidden state.
- The project includes source, outputs, instructions and honest tool, privacy and verification limits.
Want more background?
The idea in everyday life
Files chart.html, chart-data.mjs and test-chart.mjs use North 8, South 12, West 0 fictional visits. Serve locally with python3 -m http.server 8765 --bind 127.0.0.1; open chart.html.
With a 100-unit plot height and maximum 20, height equals value/20×100; y equals the baseline 120 minus that height.
Convert values into checked SVG geometry — original worked practice
With a 100-unit plot height and maximum 20, height equals value/20×100; y equals the baseline 120 minus that height.
Files chart.html, chart-data.mjs and test-chart.mjs use North 8, South 12, West 0 fictional visits. Serve locally with python3 -m http.server 8765 --bind 127.0.0.1; open chart.html.
1. Step 1
Calculate North height as 8/20*100 and y as 120 minus that result.
You should see: North height 40 and y 80.
With a 100-unit plot height and maximum 20, height equals value/20×100; y equals the baseline 120 minus that height.
2. Step 2
Calculate South and West using the same formula.
You should see: South height 60, y 60; West height 0, y 120.
With a 100-unit plot height and maximum 20, height equals value/20×100; y equals the baseline 120 minus that height.
3. Step 3
Inspect bars in chart-data.mjs and compare the supplied Node assertions with these independent calculations.
You should see: The implemented formula agrees with the hand calculation.
With a 100-unit plot height and maximum 20, height equals value/20×100; y equals the baseline 120 minus that height.
4. Step 4
Retain the common scale and coordinate calculation table.
You should see: A independently checked scale-to-coordinate record.
With a 100-unit plot height and maximum 20, height equals value/20×100; y equals the baseline 120 minus that height.
What to finish
Produce a checked common-scale geometry table with value, height, and top coordinate.
Watch for this
Using the top y coordinate as bar height or giving categories different scales.
How can I tell I understand it?
Demonstrate the rule: With a 100-unit plot height and maximum 20, height equals value/20×100; y equals the baseline 120 minus that height. Use the supplied variant to distinguish a changed result from a broken implementation.
Quick knowledge check
Answer all 3 questions. Get at least 2 right and the lesson completes automatically.
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Answer all 3 questions above and get at least 2 right. You can review the explanations and try again.
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Source & access notes · checked 2026-10-01
Relevant documented module/API behavior inspected during expansion authoring; actual execution evidence is recorded separately. No grant eligibility is established.
Access: Official page retrieved with the web reader on 2026-10-01. Documentation reading does not certify execution in every native tool or browser.
Reuse: Original local practice files, fictional data, worked examples and questions. Concepts paraphrased and linked; source exercises are not copied.
Source & access notes · checked 2026-10-01
Relevant documented module/API behavior inspected during expansion authoring; actual execution evidence is recorded separately. No grant eligibility is established.
Access: Official page retrieved with the web reader on 2026-10-01. Documentation reading does not certify execution in every native tool or browser.
Reuse: Original local practice files, fictional data, worked examples and questions. Concepts paraphrased and linked; source exercises are not copied.
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