Mark Wickens

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POL

[All Models]

Purpose

Converts rectangular coordinates (x,y) to polar coordinates (r,theta).

Format

POL         ( x-coordinate , y-coordinate )
              └─────┬────┘   └─────┬────┘
         Numeric expression  Numeric expression

Example

POL(3, 2)

Parameters

• x-coordinate & y-coordinate: Numeric expression.

  x

  +

  y

  > 0

Explanation

1. Converts rectangular coordinates (x,y) to polar coordinates (r,theta). The following relational expressions are used at this time:

   r = sqrt(x^2 + y^2) cos(theta) = x / sqrt(x^2 + y^2) sin(theta) = y / sqrt(x^2 + y^2)

2. The value of r is automatically assigned to variable X, while theta is automatically assigned to variable Y.
3. The value of theta is given as follows:
   • DEG: -180 < theta <= 180
   • RAD: -pi < theta <= pi
   • GRA: -200 grads < theta <= 200 grads

See

• REC

Sample Program

10  A=5 : B=3
20  Z=POL(A,B)
30  PRINT X; Y

Converts rectangular coordinate point (5,3) to polar coordinates.