A fitted line

<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@toclocoinc/lattice-grid@1.27.0/lattice-grid.min.css">

<div id="app"></div>

<script type="module">
  import React from 'https://esm.sh/react@18';
  import { createRoot } from 'https://esm.sh/react-dom@18/client';
  import { createGrid } from 'https://cdn.jsdelivr.net/npm/@toclocoinc/lattice-grid@1.27.0/lattice-grid.esm.min.js';
  import createLatticeGrid from 'https://cdn.jsdelivr.net/npm/@toclocoinc/lattice-grid@1.27.0/modules/react.esm.min.js';
  import { createChart } from 'https://cdn.jsdelivr.net/npm/@toclocoinc/lattice-grid@1.27.0/modules/charts.esm.min.js';

  const LatticeGrid = createLatticeGrid({ React, createGrid });

  const columns = [
    { field: 'symbol', title: 'Symbol', layout: { pin: 'start', width: 120 } },
    { field: 'desk', title: 'Desk', filter: { type: 'set' } },
    { field: 'price', title: 'Price', type: 'number', format: { decimals: 4 } },
    { field: 'volume', title: 'Volume', type: 'number', format: { notation: 'compact' } },
    { field: 'notional', title: 'Notional', type: 'number',
      format: { style: 'currency', currency: 'USD' }, total: 'sum' },
  ];

  const rows = [/* trading records, one per instrument */];

  function App() {
    const gridRef = React.useRef(null);

    React.useEffect(() => {
      const grid = gridRef.current.grid;
      // fit draws a least-squares line through the points, per series, with its
      // R2 beside it. The chart reads the live grid through the ref, so the fit
      // recomputes over whatever the filters leave.
      createChart({ grid, container: '#chart', type: 'scatter', x: 'volume', y: 'notional',
        fit: true, title: 'Notional against volume, fitted' });
    }, []);

    return (
      <>
        <div id="chart" style={{ height: '340px' }} />
        <LatticeGrid
          ref={gridRef}
          rowKey="id"
          columns={columns}
          rows={rows}
          style={{ height: '320px', marginTop: '14px' }}
        />
      </>
    );
  }

  createRoot(document.getElementById('app')).render(<App />);
</script>