Stefan Verhoeven sverhoeven
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| function iterations2spec(iterations) { | |
| // Because the initial guess can be changed now we need to scale equation line to iterations | |
| const max_x = Math.max(...iterations.map(d => d.x)); | |
| const min_x = Math.min(...iterations.map(d => d.x)); | |
| const equation_line = { | |
| "width": 800, | |
| "height": 600, | |
| "data": { | |
| "sequence": { | |
| // Draw equation within -4 to 4 window, if iterations are inside of window |
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| const [result, setResult] = React.useState({ root: undefined, iterations: [] }); | |
| function handleSubmit(event) { | |
| event.preventDefault(); | |
| const worker = new Worker('worker.js'); | |
| worker.onmessage = function (message) { | |
| if (message.data.type === 'RESULT') { | |
| const result = message.data.payload; | |
| setResult(result); | |
| worker.terminate(); |
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| // this JavaScript snippet is stored as webassembly/worker.js | |
| importScripts('newtonraphson.js'); | |
| // this JavaScript snippet is later referred to as <<worker-provider-onmessage>> | |
| onmessage = function(message) { | |
| // this JavaScript snippet is before referred to as <<handle-message>> | |
| if (message.data.type === 'CALCULATE') { | |
| createModule().then(({NewtonRaphson}) => { | |
| // this JavaScript snippet is before referred to as <<perform-calc-in-worker>> | |
| const tolerance = message.data.payload.tolerance; |
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| const spec = { | |
| "$schema": "https://vega.github.io/schema/vega-lite/v4.json", | |
| "width": 800, | |
| "height": 600, | |
| "title": {"text": "Iterative root finding", "fontSize": 20, "fontWeight": "normal"}, | |
| "layer": [ | |
| equation_line, | |
| root_rule, | |
| iterations_scatter | |
| ] |
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| const root_rule = { | |
| "data": {"values": [{"x": -1}]}, | |
| "encoding": {"x": {"field": "x", "type": "quantitative"}}, | |
| "layer": [ | |
| {"mark": {"type": "rule", "strokeDash": [4, 8]}}, | |
| {"mark": | |
| { | |
| "type": "text", | |
| "align": "right", | |
| "baseline": "bottom", |
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| const root_rule = { | |
| "data": {"values": [{"x": -1}]}, | |
| "encoding": {"x": {"field": "x", "type": "quantitative"}}, | |
| "layer": [ | |
| {"mark": {"type": "rule", "strokeDash": [4, 8]}}, | |
| {"mark": | |
| { | |
| "type": "text", | |
| "align": "right", | |
| "baseline": "bottom", |
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| const equation_line = { | |
| "data": {"sequence": {"start": -4, "stop": 4, "step": 0.1, "as": "x"}}, | |
| "transform": [ | |
| { | |
| "calculate": "2 * datum.x * datum.x * datum.x - 4 * datum.x * datum.x + 6", | |
| "as": "y" | |
| } | |
| ], | |
| "mark": "line", | |
| "encoding": { |
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| <html> | |
| <head> | |
| <script type="text/javascript" src="newtonraphson.js"></script> | |
| <script src="https://cdn.jsdelivr.net/npm/vega@5.13.0"></script> | |
| <script src="https://cdn.jsdelivr.net/npm/vega-lite@4.13.0"></script> | |
| <script src="https://cdn.jsdelivr.net/npm/vega-embed@6.8.0"></script> | |
| </head> | |
| <body> | |
| <div id="plot"></div> | |
| <script> |
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| <html> | |
| <head> | |
| <script type="text/javascript" src="newtonraphson.js"></script> | |
| <script src="https://cdn.jsdelivr.net/npm/vega@5.13.0"></script> | |
| <script src="https://cdn.jsdelivr.net/npm/vega-lite@4.13.0"></script> | |
| <script src="https://cdn.jsdelivr.net/npm/vega-embed@6.8.0"></script> | |
| </head> | |
| <body> | |
| <div id="plot"></div> | |
| <script> |
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| const spec = { | |
| "$schema": "https://vega.github.io/schema/vega-lite/v4.json", | |
| "width": 800, | |
| "height": 600, | |
| "title": { | |
| <stuff related to the title> | |
| }, | |
| "data": { | |
| <holds the iterations we want to plot as an array of iteration objects> | |
| }, |