Formula Node and Expression Node Functions

The following list contains the names of the Formula Node and Expression Node functions, and their descriptions. Except for the binary functions, you also can use these functions with the Formula VIs and the Nonlinear Curve Fit VI. All function names must be lowercase. You also can use operators and the pi constant in Formula and Expression Nodes.

Note  Formula Node and Expression Node functions might not return the same value as functions with the same name in Microsoft Excel, the MATLAB® software, or other text-based math environments.

Note  You can use Formula Node most effectively if you are familiar with the C programming language. LabVIEW Help assumes you are familiar with C and does not contain any topics related to programming in C. Refer to The C Programming Language by Brian W. Kernighan and Dennis M. Ritchie or Teach Yourself C by Herbert Schildt for more information.

Function	Corresponding LabVIEW Function	Description
abs(x)	Absolute Value	Returns the absolute value of x.
acos(x)	Inverse Cosine	Computes the inverse cosine of x in radians.
acosh(x)	Inverse Hyperbolic Cosine	Computes the inverse hyperbolic cosine of x.
asin(x)	Inverse Sine	Computes the inverse sine of x in radians.
asinh(x)	Inverse Hyperbolic Sine	Computes the inverse hyperbolic sine of x.
atan(x)	Inverse Tangent	Computes the inverse tangent of x in radians.
atan2(y,x)	Inverse Tangent (2 Input)	Computes the arctangent of y/x in radians.
atanh(x)	Inverse Hyperbolic Tangent	Computes the inverse hyperbolic tangent of x.
ceil(x)	Round Toward +Infinity	Rounds x to the next higher integer (smallest integer x).
cos(x)	Cosine	Computes the cosine of x, where x is in radians.
cosh(x)	Hyperbolic Cosine	Computes the hyperbolic cosine of x.
cot(x)	Cotangent	Computes the cotangent of x (1/tan(x)), where x is in radians.
csc(x)	Cosecant	Computes the cosecant of x (1/sin(x)), where x is in radians.
exp(x)	Exponential	Computes the value of e raised to the x power.
expm1(x)	Exponential (Arg) – 1	Computes one less than the value of e raised to the x power ((e^x) – 1).
floor(x)	Round To –Infinity	Truncates x to the next lower integer (largest integer x).
getexp(x)	Mantissa & Exponent	Returns the exponent of x.
getman(x)	Mantissa & Exponent	Returns the mantissa of x.
int(x)	Round To Nearest	Rounds x to the nearest integer.
intrz(x)	—	Rounds x to the nearest integer between x and zero.
ln(x)	Natural Logarithm	Computes the natural logarithm of x (to the base of e).
lnp1(x)	Natural Logarithm (Arg +1)	Computes the natural logarithm of (x + 1).
log(x)	Logarithm Base 10	Computes the logarithm of x (to the base of 10).
log2(x)	Logarithm Base 2	Computes the logarithm of x (to the base of 2).
max(x,y)	Max & Min	Compares x and y and returns the larger value.
min(x,y)	Max & Min	Compares x and y and returns the smaller value.
mod(x,y)	Quotient & Remainder	Computes the remainder of x/y, when the quotient is rounded toward –Infinity.
pow(x,y)	Power of X	Computes x raised to the y power.
rand( )	Random Number (0 – 1)	Produces a floating-point number between 0 and 1 exclusively.
rem(x,y)	Quotient & Remainder	Computes the remainder of x/y, when the quotient is rounded toward –Infinity.
sec(x)	Secant	Computes the secant of x, where x is in radians (1/cos(x)).
sign(x)	Sign	Returns 1 if x is greater than 0, returns 0 if x is equal to 0, and returns –1 if x is less than 0.
sin(x)	Sine	Computes the sine of x, where x is in radians.
sinc(x)	Sinc	Computes the sine of x divided by x (sin(x)/x), where x is in radians.
sinh(x)	Hyperbolic Sine	Computes the hyperbolic sine of x.
sizeOfDim(ary,di)	—	Returns the size of the dimension di specified for the array ary.
sqrt(x)	Square Root	Computes the square root of x.
tan(x)	Tangent	Computes the tangent of x, where x is in radians.
tanh(x)	Hyperbolic Tangent	Computes the hyperbolic tangent of x.