atan2 ( y ; x )
Rate this function: Average rating: 3.8 (8 votes)
Discuss this Custom Function
Michael George, Michael George Consulting
mailto:mgeorge@coresupport.com
returns the base angle (arctan) of a triangle with the sides X and Y.
Sample Input:
atan2 ( y ; x )
1 0
1 1
0 1
-1 1
-1 0
-1 -1
0 -1
1 -1
|
|
Sample Output:
(in radians)
0
0.7853...
1.5707...
2.3561...
3.1415...
3.9269...
4.7123...
5.4977... |
|
Description:
The function atan2(y;x) returns the arctan of y,x with adjustments for the signs of x and y so that the angle returned is the angle of the cartesian point (x,y) in radians.
The commonest use of atan2 is in converting between rectangular and polar co-ordinates. The formula for calculating the *initial* heading for a great-circle route from point A to point B uses atan2.
Please be aware that the parameter order is y,x and not x,y as usual.
Note: these functions are not guaranteed
or supported by BrianDunning.com. Please contact the individual
developer with any questions or problems.
This is my Custom Function and I want to
edit it
Discuss:There are no comments yet. Be the first to post a comment about this Custom Function! Please try to keep it brief & to the point. Anyone can post:
|
Newest Custom Functions:
| 1. |
GetResultParameter( ParameterName ) |
| |
(Wed, Aug 25, 8:32am) |
| 2. |
GetListParameter ( ParameterList ; ParameterName ) |
| |
(Wed, Aug 25, 8:25am) |
| 3. |
Standard_Deviation( Field ; MaxLoopCount ; StartIndex ; StdDeviation ; ArithMeanValue ) |
| |
(Tue, Aug 24, 10:57am) |
| 4. |
Arithmetic_Mean ( Field ; MaxLoopCount ; StartIndex ; MeanValue ) |
| |
(Tue, Aug 24, 10:51am) |
| 5. |
Age ( Birth; theDate; Format ) |
| |
(Fri, Aug 20, 9:50am) |
| 6. |
Power ( x ; y ) |
| |
(Thu, Aug 19, 5:56am) |
| 7. |
portal.rowCount ( _name ) |
| |
(Sun, Aug 15, 2:41pm) |
| 8. |
PostPer_Day ( Post; startDate ; finishDate ; returnType ) |
| |
(Sat, Aug 14, 2:02pm) |
 |
|
