demo D266

Parallel coordinates in Angular

One line per row across several axes at once, coloured by group to surface a pattern

type: 'parallel', columns, colourBy

This draws one line per row across several axes at once, coloured by group, so a pattern across many measures surfaces. It shows how records with many attributes cluster or differ, which a pair of axes cannot.

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, AfterViewInit } 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 '@toclocoinc/lattice-grid/modules/chart-parallel';  // opt in to the parallel type
import { LatticeGridComponent, provideLattice } from '@toclocoinc/lattice-grid/angular';

@Component({
  selector: 'app-root',
  standalone: true,
  imports: [LatticeGridComponent],
  template:
    '<div id="chart" style="height:340px"></div>' +
    '<lattice-grid [config]="grid" style="display:block;height:340px;margin-top:14px"></lattice-grid>',
})
export class AppComponent implements AfterViewInit {
  @ViewChild(LatticeGridComponent) gridRef!: LatticeGridComponent;

  grid = {
    rowKey: 'id',
    columns: [
      { field: 'symbol', title: 'Symbol' },
      { field: 'desk', title: 'Desk', filter: { type: 'set' } },
      { field: 'price', title: 'Price', type: 'number', format: { decimals: 4 } },
      { field: 'bid', title: 'Bid', type: 'number', format: { decimals: 4 } },
      { field: 'ask', title: 'Ask', 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' },
    ],
    rows: [/* instruments: symbol, desk, price, bid, ask, volume, notional */],
  };

  ngAfterViewInit() {
    // columns draws one axis per measure and one line per row; colourBy
    // tints the lines by a category, so a pattern per desk shows.
    createChart({ grid: this.gridRef.grid, container: '#chart', type: 'parallel', columns: ['price', 'bid', 'ask', 'volume'], colourBy: 'desk', title: 'Instruments across four measures' });
  }
}

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