# mathjs | An extensive math library for JavaScript and Nodejs | Math library

## kandi X-RAY | mathjs Summary

## kandi X-RAY | mathjs Summary

Math.js is an extensive math library for JavaScript and Node.js. It features a flexible expression parser with support for symbolic computation, comes with a large set of built-in functions and constants, and offers an integrated solution to work with different data types like numbers, big numbers, complex numbers, fractions, units, and matrices. Powerful and easy to use.

### Support

### Quality

### Security

### License

### Reuse

### Top functions reviewed by kandi - BETA

- Invoke the inverse of the inverse of the given equation

## mathjs Key Features

## mathjs Examples and Code Snippets

```
import { fraction } from 'mathjs';
```

```
import * as mathjs from 'mathjs;
```

```
import * as math from 'mathjs'
const app=createApp({....})
app.config.globalProperties.$math =math
```

```
const mathjs = require("mathjs");
const addCommandoEmbed = new Discord.MessageEmbed()
.setTitle(`SUCCESS\n\n${args.join(' + ')} = ${mathjs.evaluate(args.join(" + "))}`)
.setColor('#1be730');
message.channel.send(addCommandoEmbed)
```

```
import * as math from 'mathjs'
```

```
// configuration
export { config } from './configReadonly.js'
// functions and constants
export * from './pureFunctionsAny.generated.js'
export * from './impureFunctionsAny.generated
```

```
const mathjsUrl = "https://cdnjs.cloudflare.com/ajax/libs/mathjs/7.5.1/math.min.js";
pm.sendRequest(mathjsUrl, (err, response) => {
const mathjs = response.text();
(new Function(mathjs))();
let result = math.multiply(4
```

```
let str = "7.30*7.40-2.10*1.30+8.10*(2.70+0.60+4.70)+0.30*0.60+ 1.60*0.70+2.95*2.65+6.00*5.80"
let strArr = str.split("*")
let parsedParenthesis = strArr.map(expression => {
if (!isNaN(expression))
return expression
let regex
```

```
npm install mathjs
```

```
console.log("e was: " + mjs.e);
```

```
export var moduleNamer = (function(){
//module implementation
}());
```

```
//reference like this from your component:
```

```
const math = require('mathjs')
let y = [0, 1, 2, 3, 4]
let m = math.matrix(y)
console.log(m.size()) // [ 5 ]
math.reshape(m, [m.size()[0], 1])
console.log(m.size()) // [ 5, 1 ]
console.log(m.valueOf()) // [ [ 0 ], [ 1 ], [ 2
```

```
import { create, all } from 'mathjs';
const mathjs = new create(all);
mathjs.config({ number: 'BigNumber' });
```

```
import * as mathjs from 'mathjs';
```

```
import { create, all, MathJsStatic } from 'mathjs';
private mathjs: Partial;
constructor() {
this.mathjs = create(all, { number: 'BigNumber', precision: 128 });
}
```

## Community Discussions

Trending Discussions on mathjs

QUESTION

I am wanting to see how I can find the nullspace of a m x n matrix in javascript. In MATLAB, we can use the built-in function null(A). So I was wondering if there is something similar for javascript? I know that we could try solving the system Ax=0, but using the math.js libraries, the built-in functions come with the requirement that A is n x n or square. Which is not necessarily the case.

See for example https://mathjs.org/docs/reference/functions/lusolve.html

I'd appreciate any references to do this in javascript or how I could build such a script from scratch if needed.

Thanks!

...ANSWER

Answered 2022-Jan-29 at 22:22Wanting to restrict to just what's in `math.js`

...

If you know m > n and A has full column rank and your need is just to see what part of some m-dimensional vector v is not in the column span, then `math.qr`

and do v - (Q' * (Q * v))

Otherwise, try `math.eigs`

on A' * A and then pick the eigenvectors corresponding to the nearly-0 eigenvalues (according to some tolerance).

QUESTION

I get this error whenever I use 'mathjs'

**TypeError: undefined is not an object (evaluating '_mathjs.default.fraction')**

Basically my code is this

...ANSWER

Answered 2022-Jan-25 at 16:52Looking at the library's npm page, I think you need to use a named import, not the default one:

QUESTION

I'm using Node.js with the mathjs package. Mathjs uses radians in its trig functions. I want to include a degree mode for a calculator I'm making. How can I add "deg" after every number within any sin/cos/tan function in a string? This way, mathjs will calculate it using degrees instead so it can work.

Example: `5*(2+3)/sin(4+(3-2))`

should become `5*(2+3)/sin(4deg+(3deg-2deg))`

However: `5*(2+3)/(4+(3-2))`

should not change.

I've looked everywhere: Regular expressions, reddit, google, I've found nothing. The closest I've come is a regular expression that breaks when there are parentheses inside the sin function (`/sin\(.*?\)/`

).

Edit: Yes I have looked at the angle configuration example. No, that doesn't solve my problem: It assumes the user is implementing a single value to calculate the sine of, I am trying to calculate full expressions with a degree mode (mathjs.evaluate())

...ANSWER

Answered 2022-Jan-13 at 18:14You could instead simply replace the trig function implementations with versions that use degrees...

Look at the angle configuration example in the MathJS docs. You can use the `math.import`

function to provide your own function implementations for `sin`

, `cos`

, etc., and you can refer to the original ones by first saving a reference to them.

Here is the full example from the linked docs as runnable snippet (copyright © 2013-2021 jos de jong):

QUESTION

I am working on a project with Vue. I run Vue Cli and I added the Typescript plugin. I have several vulnerabilities. When I run `npm audit fix`

it can't resolve the dependency conflict:

ANSWER

Answered 2021-Nov-01 at 04:56Your `package.json`

has a mix of dev dependencies with versions that start with `~`

and ones that start with `^`

. That's probably because some dev dependencies were installed with older versions of `npm`

that defaulted to `~`

which is more conservative than `^`

. **As a first step, change the 8 ~ versions to ^, remove node_modules and (if it exists) package-lock.json and run npm install again.** I tested this locally and it didn't reduce the number of vulnerabilities reported by

`npm audit`

but it did reduce the number of outdated packages which is a step in the right direction.Let's simplify things by only looking at the audit results for your production dependencies and ignoring (at least for the moment) issues in your dev dependencies. `npm audit --only=prod`

reports only 5 issues, all moderate. **Running npm audit --only=prod --force fix updates @capacitor/cli from 2.x to 3.x.** That's a breaking change so you'll want to test it, but if that works for you, congratulations because

`npm audit --only=prod`

reports no vulnerabilities.At this point, you could possibly choose not to worry much about the other issues reported by `npm audit`

. However if you wanted to fix them, here is the potentially tedious/arduous path I'd recommend:

- Do a manual audit of all of your dev dependencies to make sure you aren't including things you don't need. Maybe you have things that are installed that you aren't using. Uninstall them. Maybe you have things installed that are nice-to-have but you don't really need. Consider uninstalling them too.
- Run
`npm outdated`

to see what could be manually updated via a breaking change. Try doing those updates.

QUESTION

My `main.js`

contains `import "mathjs";`

and seems to be working fine within main.js as

ANSWER

Answered 2021-Oct-27 at 09:51in main.js import all as `math`

then add it as global property :

QUESTION

When I run the terminal it gives me this error:

...ANSWER

Answered 2021-Oct-21 at 15:32You have to change
`message.channel.send(embeds)`

to:

` message.channel.send({ embeds: [embed] })`

QUESTION

I am doing a test where I grab an odds value and store it as a fraction. Then I want to compare the value to a particular format depending on the option selected from the drop down.

I am trying to use these to set up the fraction and determine the odds format:

https://mathjs.org/docs/datatypes/fractions.html

How do I resolve that type error above.

Screenshot:

...ANSWER

Answered 2021-Sep-12 at 19:39If you want to use just `fraction`

you can use:

QUESTION

I want to select the text of the `input`

element on focus. I tried with `bind:this={ref}`

and then `ref.select()`

, but this seems only to work when i remove the `bind:value`

from the `input`

element. Why? and how to solve?

Many thanks!

...ANSWER

Answered 2021-Jul-16 at 14:53As stated by the comment of @JHeth:
I added `await tick()`

, made the function `async`

and it worked.

QUESTION

I have a system of resistors, something like this: Resistor schematic

I made a website which renders diagrams like this one (not this one exactly). The user can change resistance of each resistor. I want to calculate every current in the system.

I found a solution using Kirchhoff's laws, which gave me a system of linear equations. I solved it with *math.js* using inverse matrix. This approach worked well on smaller circuits.

In this circuit, i have more equations, than variables, which means that I cannot compute inverse matrix, to solve them. Simplifying them manually, to match the number of unknowns is an option, but that would require a human. The website should be able to calculate everything on its own.

Now I am looking for a way to solve a system of linear equations, which cannot be represented as a square matrix. Any suggestions?

Thanx!

**Edit:**

My current approach looks like this.

...ANSWER

Answered 2021-Jul-10 at 21:16- This approcah makes a row reduction of the matrix, and gives as a result an string with the unknown values. In case the system has infinite resolutions, this would returns simplified equations so you can parameterize later.

**EDIT** : Independent terms are in the last column of the array.

QUESTION

Jsxgraph uses Mathjs to render Math expressions for text object. What can I do to embed Katex in Jsxgraph?

...ANSWER

Answered 2021-Jun-23 at 16:27The use of KaTeX is suppported in the last few nightly builds and will be supported officially in the next release 1.2.4+. To enable it, the KaTeX library has to be included. Here is a small example:

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

## Vulnerabilities

## Install mathjs

The build script currently generates two types of output:. For each function, an object is generated containing the factory functions of all dependencies of the function. This allows to just load a specific set of functions, and not load or bundle any other functionality. So for example, to just create function add you can do math.create(addDependencies).

any, generate entry points to create full versions of all functions

number: generating and entry points to create lightweight functions just supporting number

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