# SCALE_RANGE_EXCLUDES_ZERO

> SCALE_RANGE_EXCLUDES_ZERO is a lint warning: Radar radii are measured from an authored non-zero minimum.

- **Tier:** lint
- **Severity:** warning
- **Origins:** source

## What triggers it

A radar chart sets min above zero.

## How to fix it

Use min 0 for proportional radii, or retain the deliberate truncation and disclose the scale.

## Example

```mermaid
radar-beta
  axis a, b, c
  curve x{95, 96, 99}
  min 90
  max 100
```

Run `am verify diagram.mmd --json`, inspect this code, and apply the smallest source or typed mutation that clears it. If it persists after two mechanical attempts, return the warning and ask for human review.

Full page: https://agentic-mermaid.dev/warnings/SCALE_RANGE_EXCLUDES_ZERO/