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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. |

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