How to use the atan2 function from mathjs

Find comprehensive JavaScript mathjs.atan2 code examples handpicked from public code repositorys.

mathjs.atan2 is a function in the mathjs library that returns the arctangent of the quotient of its two arguments.

quantum-circuit.js

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QuantumCircuit.prototype.eulerAnglesZYZ = function(inputMatrix) {
	var eulerAngles = {theta: null, phi: null, lambda: null, phase: null};
	var coeff = math.pow(math.det(inputMatrix), -0.5);
	eulerAngles.phase = -1 * math.complex(coeff).toPolar().phi;
	var su_mat = math.multiply(coeff, inputMatrix);
	eulerAngles.theta = 2 * math.atan2(math.abs(su_mat[1][0]), math.abs(su_mat[0][0]));
	var phiplambda = 2 * math.complex(su_mat[1][1]).toPolar().phi;
	var phimlamda = 2 * math.complex(su_mat[1][0]).toPolar().phi;
	eulerAngles.phi = (phiplambda + phimlamda) / 2.0;
	eulerAngles.lambda = (phiplambda - phimlamda) / 2.0;

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+ 157 other calls in file

ik.js

GitHub: CSUFTitanRover/TitanRover

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  s2 =  Math.sqrt(1 - Math.pow(c2,2));
  THETA2D = -math.atan2(s2, c2); // theta2 is deduced

  k1 = l1 + l2*math.cos(THETA2D);
  k2 = l2*(math.sin(THETA2D));
  gamma = math.atan2(k2, k1);
  THETA1D =  math.atan2(Y, X) - gamma    ; // Theta 1 deduced

}

+ 3 other calls in file

How does mathjs.atan2 work?

mathjs.atan2 is a function in the mathjs library that computes the arctangent of the quotient of its two arguments. It returns the angle (in radians) between the positive x-axis and the point (x, y) on the plane, where x is the first argument and y is the second argument. The atan2 function is useful for calculating the angle between two points on a plane. In particular, it is useful for calculating the angle of rotation needed to align an object with respect to another object. The atan2 function takes two arguments: y and x. It returns the angle (in radians) between the positive x-axis and the point (x, y) on the plane. The result is a number between -π and π. Here's the formula for calculating the arctangent using atan2: scss Copy code {{{{{{{ class="!whitespace-pre hljs language-scss">angle = atan2(y, x) In this formula, y is the vertical coordinate of the point and x is the horizontal coordinate of the point. The function returns the angle (in radians) between the positive x-axis and the point (x, y) on the plane. Note that mathjs.atan2 is part of the mathjs library, which is a collection of mathematical functions and utilities for JavaScript. It is useful for tasks such as numerical analysis, linear algebra, statistics, and more.

example.js

GitHub: seattleacademy/hmc5883l

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});
hmc5883l.readY(function(err, data){
  console.log("Y value =", data);
  yval = data;
});
bearing = math.atan2(yval, xval) + .48;
if(bearing < 0)
{
  bearing += 2 * math.pi;
}

create_svg.cjs

GitHub: jannikluhn/ens-chain-letter

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    r0 * kp1 * math.sin(theta) - r0 * math.sin(kp1 * theta),
  ];
}


function subtractAngles(a0, a1) {
  return math.atan2(math.sin(a0 - a1), math.cos(a0 - a1));
}


function normalize(p) {
  return math.divide(p, math.norm(p));

+ 6 other calls in file

Ai Example

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const math = require("mathjs");

const x = 2;
const y = 3;

const angle = math.atan2(y, x);

console.log(angle); // Output: 0.982793723247329

In this example, we start by importing the mathjs library. We then define two variables called x and y that represent the horizontal and vertical coordinates of a point on a plane. We call math.atan2 with y and x as its arguments to calculate the angle between the positive x-axis and the point (x, y) on the plane. We store the result in a variable called angle. Finally, we log angle to the console, which outputs 0.982793723247329 (in radians) as the angle between the positive x-axis and the point (2, 3) on the plane. Note that this is just a simple example, and mathjs.atan2 can be used to calculate the angle between any two points on a plane.

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