Home

Index

How to use the evaluate function from mathjs

Find comprehensive JavaScript mathjs.evaluate code examples handpicked from public code repositorys.

mathjs.evaluate is a function used in JavaScript that evaluates a mathematical expression as a string and returns the result.

quantum-circuit.js

8562
8563
8564
8565
8566
8567
8568
8569
8570
8571
			gateParams[gateParamName] = math.evaluate(gate.options.params[gateParamName]);
		}
	}
	
	for(var eqParamName in equivalent.params) {
		eqParams[eqParamName] = math.evaluate(equivalent.params[eqParamName], gateParams);
	}

}
equivalentCircuit.addGate(equivalent.name, column, gateWires, { params: eqParams, condition: qiskitCondition });

203

+ 2843 other calls in file

Core.js

GitHub: Kai0071/A17

3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
case 'calculator': case 'cal': case 'calculate':{
   if (isBan) return reply(mess.banned)	 			
if (isBanChat) return reply(mess.bangc)
if (args.length < 1) return reply(`*Example :*\n${prefix}calculator 2*5\n\n`)
let qsd = args.join(" ")
if (typeof mathjs.evaluate(qsd) !== 'number') {
reply('Error')
} else {
reply(`\`\`\`「 _Calculator Tool_ 」\`\`\`\n\n*Input :* ${qsd}\n*Calculation Result :* ${mathjs.evaluate(qsd.replace(/×/g, "*").replace(/x/g, "*").replace(/÷/g, "/"))}`)
}

600

+ 6 other calls in file

How does mathjs.evaluate work?

mathjs.evaluate is a function provided by the 'mathjs' library, which is used for performing mathematical operations in JavaScript. This function allows you to evaluate a mathematical expression provided as a string and returns the result of the expression. The expression can contain variables, constants, functions, and mathematical operations. To use mathjs.evaluate, you pass the expression as a string to the function, and it returns the result of the evaluation. If the expression contains variables, you can pass an object with the variable names and their values as a second argument to the function. The evaluation process follows the standard rules of mathematical expressions, including operator precedence and associativity. Under the hood, mathjs.evaluate uses a parser to parse the input expression and generate an abstract syntax tree (AST). The AST is then traversed and evaluated according to the rules of the mathematics. The function also supports complex numbers, units of measurement, and symbolic calculations. Overall, mathjs.evaluate provides a powerful and flexible way to evaluate mathematical expressions in JavaScript, making it useful for a wide range of applications, including scientific computing, data analysis, and visualization.

calculator.js

GitHub: pxsx/All-In-One-Discord-Bot

177
178
179
180
181
182
183
184
185
186
} else if (btn.customId === 'cal=') {
    if (str === ' ' || str === '' || str === null || str === undefined) {
        return;
    } else {
        try {
            str += ' = ' + math.evaluate(str);
            stringify = '```\n' + str + '\n```';
            edit();
            str = ' ';
            stringify = '```\n' + str + '\n```';

+ 152 other calls in file

index.js

GitHub: SlavyanDesu/BocchiBot

693
694
695
696
697
698
699
700
701
702
    }
    break
case 'math':
    if (!isRegistered) return await bocchi.reply(from, eng.notRegistered(), id)
    if (!q) return await bocchi.reply(from, eng.wrongFormat(), id)
    if (typeof mathjs.evaluate(q) !== 'number') {
        await bocchi.reply(from, eng.notNum(q), id)
    } else {
        if (limit.isLimit(sender.id, _limit, limitCount, isPremium, isOwner)) return await bocchi.reply(from, eng.limit(), id)
        limit.addLimit(sender.id, _limit, isPremium, isOwner)

382

245

Ai Example

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
const math = require("mathjs");

// Evaluate a simple mathematical expression
const result1 = math.evaluate("2 + 3 * 4");
console.log(result1); // Output: 14

// Evaluate an expression with variables
const x = 3;
const y = 4;
const result2 = math.evaluate("x^2 + y^2", { x: x, y: y });
console.log(result2); // Output: 25

// Evaluate an expression with functions and units
const expr = "sqrt(3^2 + 4^2) * m";
const result3 = math.evaluate(expr, { m: math.unit("m") });
console.log(result3.toString()); // Output: 5 m

In this example, mathjs.evaluate is used to evaluate three different mathematical expressions. The first expression is a simple arithmetic expression that evaluates to 14. The second expression contains variables x and y, which are provided as a second argument to mathjs.evaluate using an object. The third expression contains a function sqrt and a unit m, which are also provided as a second argument using an object. The function toString() is used to convert the unit to a string for output. Note that mathjs.evaluate is a powerful function that supports a wide range of mathematical operations and functions, including trigonometry, logarithms, calculus, linear algebra, and more.

assert.js

GitHub: ergogen/ergogen

1
2
3
4
5
6
7
8
9
10
const u = require('./utils')
const Point = require('./point')
const mathjs = require('mathjs')

const mathnum = exports.mathnum = raw => units => {
    return mathjs.evaluate(`${raw}`, units || {})
}

const assert = exports.assert = (exp, msg) => {
    if (!exp) {

239

602

math.js

GitHub: crowbartools/Firebot

19
20
21
22
23
24
25
26
27
28
// TODO(ebiggz, v5.3.2): remove this after a few versions to give users time to not needing to quote arguments to get validation to work
exp = await utils.populateStringWithTriggerData(exp, trigger);

let evalulation;
try {
    evalulation = mathjs.evaluate(exp);
} catch (err) {
    logger.warn("error parsing math expression", err);
    evalulation = -1;
}

246

+ 3 other calls in file

clac.js

GitHub: DevEvil99/DevEvilBot-Discord-Bot

9
10
11
12
13
14
15
16
17
if(!args[0]) return message.channel.send('<a:no:784463793366761532> **Please enter a question**');

let resp;

try {
    resp = math.evaluate(args.join(" "))
} catch (e) {
    return message.channel.send('<a:no:784463793366761532> **Please provide a __**valid**__ question**')
}

102

index.js

GitHub: jly36963/notes

116
117
118
119
120
121
122
123
124
125

const basicEvaluate = () => {
  // evaluate
  math.evaluate('sqrt(3^2 + 4^2') // 5
  math.evaluate('2 inch to cm') // 5.08 cm
  math.evaluate('cos(45 deg)') // 0.7071067811865476

  // evaluate with scope
  const scope = { a: 3, b: 4 };
  math.evaluate('a * b', scope); // 12

+ 11 other calls in file

nathan.js

GitHub: ZeroChanBot/Candy-BOT

2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
reply(`${mek.quoted.isBaileys}`)
break
    case 'kalkulator':
        if (args.length < 1) return reply(`Kirim Perintah *${prefix}kalkulator [ Angka ]*\nContoh : ${prefix}kalkulator 12*12\n*NOTE* :\n- Untuk Perkalian Menggunakan *\n- Untuk Pertambahan Menggunakan +\n- Untuk Pengurangan Mennggunakan -\n- Untuk Pembagian Menggunakan /`)
        mtk = body.slice(11)
        if (typeof Math_js.evaluate(mtk) !== "number") {
            reply(`"${mtk}", Bukan Angka!\nKirim perintah *${prefix}kalkulator [ Angka ]*\nContoh : ${prefix}kalkulator 12*12\n*NOTE* :\n- Untuk Perkalian Menggunakan *\n- Untuk Pertambahan Menggunakan +\n- Untuk Pengurangan Mennggunakan -\n- Untuk Pembagian Menggunakan /`)
        } else {
            reply(`*「MATH」*\n\n*Hasil* : ${mtk} = ${Math_js.evaluate(mtk)}`)
        }

calc.ts

GitHub: JoaoSCoelho/Coffee

45
46
47
48
49
50
51
52
53
54
/* if(sinais.length === 0 || numbers.length === 0 || notIsNumber.length !== 0)return; */ // Verifica se a mensagem não tem sinais, ou números e se na mensagem há algo que não seja número, caso a resposta para alguma dessas verificações seja positiva, ele não prossegue.
if (message.content.startsWith('-') && numbers.length === 1) return // Verifica se o número inicial é negativo e se há apenas ele na mensage, caso sim, retorna
if (message.content.startsWith('(') && numbers.length === 1) return
if (Number(message.content)) return

const limitedEvaluate = math.evaluate
/* math.import = function (): any {}
math.createUnit = function (): any {}
math.parse = function (): any {}
math.simplify = function (): any {}

+ 7 other calls in file

cumputed.js

GitHub: longshanxu/vue_vuetify_parseserver_cypress

270
271
272
273
274
275
276
277
278
279
// historycount ++;
if (element.goal[0] > element.goal[1]) {
    homevsguest++;
    finalitem[0] = math.evaluate(parseFloat(finalitem[0].replace('%', '')) + 16) + '%';
    finalitem[1] = math.evaluate(parseFloat(finalitem[1].replace('%', '')) - 8) + '%';
    finalitem[2] = math.evaluate(parseFloat(finalitem[2].replace('%', '')) - 8) + '%';
}
if (element.goal[0] == element.goal[1]) {
    homevsguest+=0.7;
    guestvshome+=0.7;

+ 4535 other calls in file

msg.js

GitHub: aowkwoakwo/tes

2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014


case 'kalkulator':
const matematik = require('mathjs')
try{
let nana = q.replace("x","*")
let nunu = matematik.evaluate(nana)
let teks = `${q} = ${nunu}`
setReply(teks)
} catch (err){
setReply( 'Format salah, hanya 0-9 dan Simbol -, +, *, /, ×, ÷, π, e, (, ) yang disupport')

Parser.js

GitHub: kmoon2437/yjkl

269
270
271
272
273
274
275
276
277
278
    let n = '';
    for(let chr of num){
        if(NUMBER_ALLOWED.indexOf(chr) > -1) n += chr;
    }
    // console.log(n);
    return mathjs.evaluate(n);
}

static parseNumber(num){
    if(typeof num == 'number') return num;

math.js

GitHub: North-West-Wind/ALICE

14
15
16
17
18
19
20
21
22
23
async execute(message, args) {
    let done = "Error!";
    switch(args[0]) {
        case "evaluate":
        case "eval":
            try { done = await math.evaluate(args.slice(1).join(" ")); } catch(err) {done = "Evaluation Error"; NorthClient.storage.error(err);}
            break;
        case "derivative":
        case "ddx":
            try { done = await math.derivative(args.slice(1).join(" "), "x").compile().evaluate(); } catch(err) {done = "Differentiation Error"; NorthClient.storage.error(err);}

+ 3 other calls in file

math-generator.js

GitHub: git9527/children-helper

7
8
9
10
11
12
13
14
15
16
static isLowerLeverOperator(operator) {
  return operator === Operators.ADDITION || operator === Operators.SUBSTRUCTION
}

static calculate(expression) {
  return math.evaluate(expression)
}

static translateQuestion(numbers, operators) {
  let question = ''

gameFunc.js

GitHub: quangc992/bot-discord-co-bac

285
286
287
288
289
290
291
292
293
294
    console.log('Lỗi')
  }
},
async math(bot, message, args) {
  try {
    let result =  math.evaluate(args.join(" "))
    if(result == undefined) return message.channel.send({ content: `**ngu**`});
    message.channel.send({ content: `**${args[0]} = ${result}**`});
  } catch (err) {
    console.log(err)

+ 453 other calls in file

GE.js

GitHub: jmmcd/GEjs

518
519
520
521
522
523
524
525
526
527
   function target(x) {
return math.add(x, math.dotPow(x, 2), math.dotPow(x, 3), math.dotPow(x, 4));
   }
   var X = math.matrix([[0.0], [0.1], [0.2], [0.3], [0.4], [0.5]]);
   // console.log("s", s);
   var fX = math.evaluate(s, {"x0": X}); // could use  {"x0": X[0], etc if needed}
   // console.log("fX", fX);
   var y = target(X);
   // console.log("y", y);
   var f = RMSE(fX, y);

+ 2 other calls in file

doarraymath.cjs

GitHub: GhostWrench/quantcompare

122
123
124
125
126
127
128
129
130
131
});

// mathjs
//A = math.evaluate("[" + A.toString() + "] kg");
//B = math.evaluate("[" + B.toString() + "] cm");
//C = math.evaluate("[" + C.toString() + "] s");
var mathjsDoMath = performance.timerify(() => {
  return math.subtract(
    math.add(
      math.dotMultiply(4, math.dotDivide(math.dotMultiply(A, math.dotPow(B, 2)), math.dotPow(C, 2))),

+ 11 other calls in file

math.js

GitHub: signalitylabs/Baylee-v1

65
66
67
68
69
70
71
72
73
74
if(checkrationalize > -1) {
    args = args.substring((checkrationalize+rationalize.length));
    result = math.rationalize(args).toString();
}

if(!result) { result = math.evaluate(args).toString(); }

msg.channel.send({ embed: {
    title: 'Math Results',
    color: settings.info.color,

Core.js

GitHub: umbrella-studio/just-a-bot

5116
5117
5118
5119
5120
5121
5122
5123
5124
5125
if (isBan) return reply(mess.banned);
if (isBanChat) return reply(mess.bangc);
if (args.length < 1)
  return reply(`*Example :*\n${prefix}calculator 2*5\n\n`);
let qsd = args.join(" ");
if (typeof mathjs.evaluate(qsd) !== "number") {
  reply("Error");
} else {
  reply(
    `\`\`\`「 _Calculator Tool_ 」\`\`\`\n\n*Input :* ${qsd}\n*Calculation Result :* ${mathjs.evaluate(

Other functions in mathjs

Sorted by popularity

mathjs.evaluate is the most popular function in mathjs (87200 examples)

Other popular packages:

Home

About