The following analytic functions are supported by FlexPDE:
Function |
Comments |
ABS(x) |
Absolute value |
ARCCOS(x) |
Inverse cosine (returns radians) |
ARCSIN(x) |
Inverse sine (returns radians) |
ARCTAN(x) |
Inverse tangent (returns radians) |
ATAN2(y,x) |
Arctan(y/x) with numerically safe implementation |
BESSI(order,x) |
Modified Bessel function I for real x |
BESSJ(order,x) |
Bessel Function J |
BESSK(order,x) |
Modified Bessel function K for real x |
BESSY(order,x) |
Bessel Function Y |
COS(x) |
cosine of x (angle in radians)* |
COSH(x) |
Hyperbolic cosine |
ERF(x) |
Error Function |
ERFC(x) |
Complementary Error Function |
EXP(x) |
Exponential function |
EXPINT(x) |
Exponential Integral Ei(x) for real x>0 ** |
EXPINT(n,x) |
Exponential Integral En(x) for n>=0, real x>0 ** |
GAMMAF(x) |
Gamma function for real x>0 |
GAMMAF(a,x) |
Incomplete gamma function for real a>0, x>0 |
LOG10(x) |
Base-10 logarithm |
LN(x) |
Natural logarithm |
SIN(x) |
sine of x (angle in radians)* |
SINH(x) |
Hyperbolic sine |
SQRT(x) |
Square Root |
TAN(x) |
tangent of x (angle in radians)* |
TANH(x) |
Hyperbolic tangent |
* Use for example COS(x DEGREES) to convert arguments to radians.
** as defined in Abramowitz & Stegun, "Handbook of Mathematical Functions".
Examples:
Samples | Usage | Standard_Functions.pde
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