sizeOfSet (Stream Function)
The pol2Cart function calculating the cartesian coordinates x & y for the given theta, rho coordinates and adding them as new attributes to the existing events.
Syntax
pol2Cart(<DOUBLE> theta, <DOUBLE> rho)
pol2Cart(<DOUBLE> theta, <DOUBLE> rho, <DOUBLE> z)
Query Parameters
| Name | Description | Default Value | Possible Data Types | Optional | Dynamic |
|---|---|---|---|---|---|
| theta | The theta value of the coordinates. | DOUBLE | No | Yes | |
| rho | The rho value of the coordinates. | DOUBLE | No | Yes | |
| z | z value of the cartesian coordinates. | If z value is not given, drop the third parameter of the output. | DOUBLE | Yes | Yes |
Example 1
insert into outputStream
select x, y
from PolarStream#pol2Cart(theta, rho);
This returns cartesian coordinates (4.99953024681082, 0.06853693328228748) for theta: 0.7854 and rho: 5.
Example 2
insert into outputStream
select x, y, z
from PolarStream#pol2Cart(theta, rho, 3.4);
This returns cartesian coordinates (4.99953024681082, 0.06853693328228748, 3.4)for theta: 0.7854 and rho: 5 and z: 3.4.