Profiling a column

<script>
  import { createGrid } from 'https://cdn.jsdelivr.net/npm/@toclocoinc/lattice-grid@1.27.0/lattice-grid.esm.min.js';
  import createLatticeAction from 'https://cdn.jsdelivr.net/npm/@toclocoinc/lattice-grid@1.27.0/modules/svelte.esm.min.js';

  const lattice = createLatticeAction({ createGrid });

  let profile = '';

  const config = {
    rowKey: 'id',
    toolPanel: { side: 'left', panels: ['filters', 'columns'], exportName: 'book' },
    columnDefaults: { filter: true },
    columns: [
      { field: 'symbol', title: 'Symbol', layout: { pin: 'start', width: 120 } },
      { field: 'desk', title: 'Desk', filter: { type: 'set' } },
      { field: 'region', title: 'Region', filter: { type: 'set' } },
      { field: 'notional', title: 'Notional', type: 'number',
        format: { style: 'currency', currency: 'GBP' }, total: 'sum' },
    ],
    rows,  // trading book records
    // onGrid hands over the live grid the moment it is created. profile() returns
    // the count, the range, the quartiles, the spread and the outliers of one
    // column over the filtered rows. Recompute it whenever the filters change.
    onGrid: (grid) => {
      const report = () => {
        profile = JSON.stringify(grid.statistics.profile('notional'), null, 2);
      };
      grid.on('filter:changed', report);
      report();
    },
  };
</script>

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

<div use:lattice={config} style="height: 460px"></div>
<pre style="margin-top: 12px">{profile}</pre>