Using Mutable Chart in Observable / Shubhanshu Mishra

Researcher in Machine learning, Data Mining, Social Science, and Natural Language Processing Programming languages: Python, Java, and Java Script

Published

Edited

Jan 10, 2021

Importers

md`# Using Mutable Chart in Observable

This notebook shows how one can use charts which update in observable.

The key idea is to use <code>viewof</code> of the SVG node and attach the chart object to the <code>value</code> of the viewof variable.

viewof chart = {

const chartObj = new ChartObj(200, margin);

//chartObj.init();

const container = chartObj.svg.node();

container.value = chartObj;

yield container;

}

chart.update(new Array(5).fill(1).map(d => 10 + d3.randomNormal()()), true)

data = {

chart.reset();

const rng = d3.randomInt(5, 20);

const rng2 = d3.randomNormal();

for (let i = 0; i < 10; i++) {

const l = rng();

const data = new Array(l).fill(1).map(d => 10 + rng2());

yield data;

await Promises.tick(1000);

}

chart.update(data)

//chart.update([1, 11, 3, 2, 11, 23, 12])

chart2.update([1, 11, 3, 2, 11, 23, 12])

margin = ({ top: 20, right: 30, bottom: 30, left: 40 })

d3 = require("d3")

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