Function getQuantile

getQuantile(
    output: ForecastOutput,
    seriesIndex: number,
    quantileIndex: number,
): Float32Array
Extract a specific quantile forecast for a single series.

Zero-copy — returns a direct reference to the underlying Float32Array.
Parameters
- output: ForecastOutput
  Forecast output from model.forecast().
- seriesIndex: number
  Index of the series (0-based).
- quantileIndex: number
  Quantile index (use QUANTILE_INDICES constants).
Returns Float32Array
Example
```
const q10 = getQuantile(output, 0, QUANTILE_INDICES.Q10);
```
- Defined in packages/timesfm-core/src/helpers/quantile.ts:36