Radar Chart Maker — Multi-Axis Spider & Star Polygon Plotter
A radar (spider or Kiviat) chart arranges $k \ge 3$ quantitative axes radially around a central origin ($\theta_j = 2\pi j / k$) and connects normalized scores into a closed polygon to compare multidimensional profiles.
Tip: Paste Excel or Google Sheets rows (Ctrl+V / ⌘V) directly into any cell.
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Radial vertex coordinates for spoke j of N: x_j = cx + R * (v_j / V_max) * cos(2*pi*j/N - pi/2), y_j = cy + R * (v_j / V_max) * sin(2*pi*j/N - pi/2).
Chart Design & Use-Case Tips
- 01Radial vertex coordinates for spoke j of N: x_j = cx + R * (v_j / V_max) * cos(2*pi*j/N - pi/2), y_j = cy + R * (v_j / V_max) * sin(2*pi*j/N - pi/2).
- 02Normalize all radial axes to a common scale (such as 0–10 or 0–100 where higher is always better) so polygon area reflects overall strength.
- 03Use 5 to 8 axes for crisp hexagonal or octagonal symmetry; fewer than 5 axes looks cramped and more than 10 becomes crowded.
- 04Compare 2 series (e.g., Actual vs. Target or Vendor A vs. Vendor B) for immediate visual gap identification.
Frequently Asked Questions
Why should all axes on a radar chart share the same scale?+
Because the polygon connects adjacent spokes directly; normalizing every dimension to a 0–100 rubric ensures equal visual weight across all criteria.
How many profiles can I overlay on one radar chart?+
Up to 3 profiles (Series A, Series B, and Series C) can be plotted simultaneously with semi-transparent polygon fills and distinct vertex nodes.
What are the best use cases for a radar chart?+
Skill assessments, vendor RFP scorecards, product feature comparisons, athletic profiles, and cybersecurity maturity audits.