demo D164

Histogram and box plot in Angular

The distribution of a single column

type: 'histogram' · 'boxplot' · 'violin'

This shows the distribution of a single column three ways: a histogram, a box plot and a violin. It reveals the shape, spread and outliers of a column at a glance, which a table of numbers hides.

Building…

Loading a live grid…

This is the Angular version. A standalone component takes the whole configuration through one config input, surfaces grid events as outputs, and exposes the live grid on a getter for anything the inputs do not cover.

The configuration

import { Component, ViewChild } from '@angular/core';
import { bootstrapApplication } from '@angular/platform-browser';
import { createGrid } from '@toclocoinc/lattice-grid';
import '@toclocoinc/lattice-grid/css';
import { createChart } from '@toclocoinc/lattice-grid/modules/charts';
import { LatticeGridComponent, provideLattice } from '@toclocoinc/lattice-grid/angular';

const columns = [
  { field: 'region', title: 'Region', filter: { type: 'set' } },
  { field: 'status', title: 'Status', filter: { type: 'set' } },
  { field: 'bandwidth', title: 'Bandwidth', type: 'number' },
  { field: 'utilisation', title: 'Utilisation', type: 'number', format: { decimals: 1, suffix: '%' } },
  { field: 'charge', title: 'Monthly charge', type: 'number',
    format: { style: 'currency', currency: 'GBP' }, total: 'sum' },
];

const rows = [/* circuit records */];



@Component({
  selector: 'app-root',
  standalone: true,
  imports: [LatticeGridComponent],
  template:
    '<div style="display:grid;grid-template-columns:repeat(3, 1fr);gap:14px;height:210px">' +
    '<div id="histogram"></div>' +
    '<div id="boxplot"></div>' +
    '<div id="violin"></div>' +
    '</div>' +
    '<lattice-grid [config]="grid" (grid-ready)="onGridReady()" style="display:block;height:340px;margin-top:14px"></lattice-grid>',
})
export class AppComponent {
  @ViewChild(LatticeGridComponent) gridRef!: LatticeGridComponent;

  grid = {
    rowKey: 'id',
    columns: columns,
    rows: rows,
  };

  // The grid is created once the view has rendered, so the live instance
  // arrives on grid-ready rather than in ngAfterViewInit.
  onGridReady() {
    const grid = this.gridRef.grid;
    createChart({ grid, container: '#histogram', type: 'histogram', y: 'charge' });
    createChart({ grid, container: '#boxplot',   type: 'boxplot',   y: 'charge' });
    createChart({ grid, container: '#violin',    type: 'violin',    x: 'status', y: 'charge' });
  }
}

bootstrapApplication(AppComponent, {
  providers: [provideLattice({ createGrid })],
});