Using Intrinsic Functions in Expressions in RMxprt

RMxprt recognizes a set of intrinsic trigonometric and mathematical functions that can be used to define expressions. Intrinsic function names are reserved and may not be used as variable names.

The following intrinsic functions may be used to define expressions:

Function	Description	Syntax
abs	Absolute value (\|x\|)	abs(x)
sin	Sine	sin(x)
cos	Cosine	cos(x)
tan	Tangent	tan(x)
asin	Arcsine	asin(x)
acos	Arccosine	acos(x)
atan	Arc tangent. Takes a tangent value as an argument. Because there are two angles in a circle that can have the same tangent value, and atan can return only one value, it returns a value in the range between -90 degrees and +90 degrees (or between -pi/2 and pi/2 in radians).	atan(x)
atan2	A two-argument version of the atan function. Takes the y and x coordinates (including sign information) of a point as arguments and returns the angle from the X-axis. Can return angle values for the full circle (-180 degrees to +180 degrees or -pi to +pi in radians).	atan2(y,x)
asinh	Hyperbolic Arcsine	asinh(x)
atanh	Hyperbolic Arctangent	atanh(x)
sinh	Hyperbolic Sine	sinh(x)
cosh	Hyperbolic Cosine	cosh(x)
tanh	Hyperbolic Tangent	tanh(x)
even	Returns 1 if integer part of the number is even; returns 0 otherwise.	even(x)
odd	Returns 1 if integer part of the number is odd; returns 0 otherwise.	odd(x)
sgn	Sign extraction	sgn(x)
exp	Exponential (e^x)	exp(x)
pow	Raise to power (x^y)	pow(x,y)
if	If	if(cond_exp,true_exp, false_exp)
pwl	Piecewise Linear with linear extrapolation on x. (pwl can be used with datasets for Design Variables but not for Project variables).	pwl(dataset_exp, variable)
pwlx	Piecewise Linear x with linear extrapolation on x	pwlx(dataset_exp, variable)
pwl_periodic	Piecewise Linear with periodic extrapolation on x	pwl_periodic(dataset_exp, variable)
sqrt	Square Root	sqrt(x)
ln	Natural Logarithm (The "log" function has been discontinued. If you use "log(x)" in an expression, the software automatically changes it to "ln(x)".)	ln(x)
log10	Logarithm base 10	log10(x)
int	Truncated integer function	int(x)
nint	Nearest integer	nint(x)
max	Maximum value of two parameters	max(x,y)
min	Minimum value of two parameters	min(x,y)
mod	Modulus	mod(x,y)
rem	Returns the fractional part of a decimal number such that rem(x) = x-int(x)	rem(x)
clp	Closest point interpolation. Note: If used with a large 3D dataset, clp function will degrade.	clp(datasetName, X,Y,Z)

Note: If you do not specify units, all trigonometric functions interpret their arguments as radians. Likewise, inverse trigonometric functions' return values are in given in radians. When the argument to a trigonometric expression is a variable, the units are assumed to be radians. If you want values interpreted in degrees, supply the argument with the unit name deg.