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C++ Mathematical Expression Library (ExprTk) http://www.partow.net/programming/exprtk/index.html

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Arash Partow
2013-04-01 10:56:44 +11:00
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@ -160,6 +160,14 @@ Expression Library can be found at:
| and | Logical AND, True only if x and y are both true. |
| | (eg: x and y) |
+-----------+--------------------------------------------------------+
| mand | Multi-input logical AND, True only if all inputs are |
| | true. Left to right short-circuiting of expressions. |
| | (eg: mand(x > y,z < w,u or v,w and x)) |
+-----------|--------------------------------------------------------+
| mor | Multi-input logical OR, True if at least one of the |
| | inputs are true. Left to right short-circuiting of |
| | expressions. (eg: mand(x > y,z < w,u or v,w and x)) |
+-----------+--------------------------------------------------------+
| nand | Logical NAND, True only if either x or y is false. |
| | (eg: x nand y) |
+-----------+--------------------------------------------------------+
@ -179,6 +187,12 @@ Expression Library can be found at:
+-----------+--------------------------------------------------------+
| if | If x is true then return y else return z. |
| | (eg: if(x, y, z) or if((x + 1) > 2y, z + 1, w / v)) |
+-----------|--------------------------------------------------------+
| & | Similar to AND but with left to right expression short |
| | circuiting optimisation. (eg: (x & y) == (y and x)) |
+-----------|--------------------------------------------------------+
| | | Similar to OR but with left to right expression short |
| | circuiting optimisation. (eg: (x | y) == (y or x)) |
+-----------+--------------------------------------------------------+
(3) General Purpose Functions
@ -188,7 +202,7 @@ Expression Library can be found at:
| abs | Absolute value of x. |
+-----------+--------------------------------------------------------+
| avg | Average of all the inputs. |
| | (eg: avg(x,y,z,w) == (x+y+z+w)/4) |
| | (eg: avg(x,y,z,w,u,v) == (x+y+z+w+u+v)/6) |
+-----------+--------------------------------------------------------+
| ceil | Smallest integer that is greater than or equal to x. |
+-----------+--------------------------------------------------------+
@ -219,9 +233,12 @@ Expression Library can be found at:
| logn | Base N logarithm of x (eg: logn(1235,8)) |
| | where n > 0 and is an integer. |
+-----------+--------------------------------------------------------+
| max | Largest value of all the inputs. (eg: max(x,y,z,w)) |
| max | Largest value of all the inputs. (eg: max(x,y,z,w,u,v))|
+-----------+--------------------------------------------------------+
| min | Smallest value of all the inputs. (eg: min(x,y,z,w)) |
| min | Smallest value of all the inputs. (eg: min(x,y,z,w,u)) |
+-----------+--------------------------------------------------------+
| mul | Product of all the inputs. |
| | (eg: mul(x,y,z,w,u,v,t) == (x*y*z*w*u*v*t)) |
+-----------+--------------------------------------------------------+
| nequal | Not-equal test between x and y using normalized epsilon|
+-----------+--------------------------------------------------------+
@ -238,7 +255,7 @@ Expression Library can be found at:
| sqrt | Square root of x, where x > 0 |
+-----------+--------------------------------------------------------+
| sum | Sum of all the inputs. |
| | (eg: sum(x,y,z,w,v) == (x+y+z+w+v)) |
| | (eg: sum(x,y,z,w,u,v,t) == (x+y+z+w+u+v+t)) |
+-----------+--------------------------------------------------------+
| trunc | Integer portion of x |
+-----------+--------------------------------------------------------+
@ -405,7 +422,9 @@ correctly optimize such expressions for a given architecture.
be enclosed with single-quotes.
eg: 'Frankly, my dear, I don't give a damn!'
(10) User defined functions can have up to 20 parameters.
(10) User defined normal functions can have up to 20 parameters.
Where as user defined vararg-functions can have unlimited an
number of parameters.
(11) The inbuilt polynomial functions can be at most of degree 12.