Difference between revisions of "Mathematical functions"
From JSXGraph Wiki
Jump to navigationJump to searchA WASSERMANN (talk | contribs) |
A WASSERMANN (talk | contribs) |
||
| Line 1: | Line 1: | ||
==Functions of the JavaScript Object Math== | ==Functions of the JavaScript Object Math== | ||
The following functions are part of every JavaScript virtual machine: | The following functions are part of every JavaScript virtual machine: | ||
| − | * Math.abs; | + | * ''Math.abs''; |
| − | * Math.acos; | + | * ''Math.acos''; |
| − | * Math.asin; | + | * ''Math.asin''; |
| − | * Math.atan; | + | * ''Math.atan''; |
| − | * Math.ceil; | + | * ''Math.ceil''; |
| − | * Math.cos; | + | * ''Math.cos''; |
| − | * Math.exp; | + | * ''Math.exp''; |
| − | * Math.floor; | + | * ''Math.floor''; |
| − | * Math.log; | + | * ''Math.log''; |
| − | * Math.max; | + | * ''Math.max''; |
| − | * Math.min; | + | * ''Math.min''; |
| − | * Math.random; | + | * ''Math.random''; |
| − | * Math.sin; | + | * ''Math.sin''; |
| − | * Math.sqrt; | + | * ''Math.sqrt''; |
| − | * Math.tan; | + | * ''Math.tan''; |
JSXGraph expands the set of available mathematical functions. To keep the JavaScript implementations clean, the new mathematical functions are part of the JSXGraph board. | JSXGraph expands the set of available mathematical functions. To keep the JavaScript implementations clean, the new mathematical functions are part of the JSXGraph board. | ||
| Line 23: | Line 23: | ||
</source> | </source> | ||
Then, the object ''board'' contains the following additional mathematical functions: | Then, the object ''board'' contains the following additional mathematical functions: | ||
| − | * board.angle(A, B, C): for Point objects A, B, C. (A: name string, id string or object pointer) | + | * ''board.angle(A, B, C)'': for Point objects A, B, C. (A: name string, id string or object pointer) |
| − | * board.rad(A, B, C) | + | * ''board.rad(A, B, C)'' |
| − | * board.distance(arr1, arr2): Euclidean distane between two vectors | + | * ''board.distance(arr1, arr2)'': Euclidean distane between two vectors |
| − | * board.pow(a, b): <math>a^b</math> for floating point value of ''b''. Math.pow is defined for integer values of b, only. | + | * ''board.pow(a, b)'': <math>a^b</math> for floating point value of ''b''. Math.pow is defined for integer values of ''b', only. |
| − | * board.round(x, n): returns string with fixed point representation of ''x''. | + | * ''board.round(x, n)'': returns string with fixed point representation of ''x''. |
May be replaced by string.tofixed(n). | May be replaced by string.tofixed(n). | ||
| − | * board.cosh(x) | + | * ''board.cosh(x)'' |
| − | * board.sinh(x) | + | * ''board.sinh(x)'' |
| − | * board.D(f): Numerically computed derivative of the function ''f'', returns a function. | + | * ''board.D(f)'': Numerically computed derivative of the function ''f'', returns a function. |
| − | * board.I(interval,f): Numerically computed v alue integral of the function ''f'' in the given interval. | + | * ''board.I(interval,f)'': Numerically computed v alue integral of the function ''f'' in the given interval. |
| − | * board.root(f,x): root of the function f. Uses Newton methon with start value ''x'. | + | * ''board.root(f,x)'': root of the function f. Uses Newton methon with start value ''x''. |
Revision as of 15:13, 25 January 2009
Functions of the JavaScript Object Math
The following functions are part of every JavaScript virtual machine:
- Math.abs;
- Math.acos;
- Math.asin;
- Math.atan;
- Math.ceil;
- Math.cos;
- Math.exp;
- Math.floor;
- Math.log;
- Math.max;
- Math.min;
- Math.random;
- Math.sin;
- Math.sqrt;
- Math.tan;
JSXGraph expands the set of available mathematical functions. To keep the JavaScript implementations clean, the new mathematical functions are part of the JSXGraph board. That means, initially a board has to be created, for example with the command
board = JXG.JSXGraph.initBoard('box', {originX: 250, originY: 250, unitX: 40, unitY: 40});
Then, the object board contains the following additional mathematical functions:
- board.angle(A, B, C): for Point objects A, B, C. (A: name string, id string or object pointer)
- board.rad(A, B, C)
- board.distance(arr1, arr2): Euclidean distane between two vectors
- board.pow(a, b): [math]a^b[/math] for floating point value of b. Math.pow is defined for integer values of b', only.
- board.round(x, n): returns string with fixed point representation of x.
May be replaced by string.tofixed(n).
- board.cosh(x)
- board.sinh(x)
- board.D(f): Numerically computed derivative of the function f, returns a function.
- board.I(interval,f): Numerically computed v alue integral of the function f in the given interval.
- board.root(f,x): root of the function f. Uses Newton methon with start value x.
