## ABS Absolute value

ABS(x) returns the absolute value of the number x.

## ACOS Arccosine function

ACOS(x) returns the arccosine of x.

## ALOGIT Antilogit function

ALOGIT(l) returns the antilogit of the (logit) number l: alogit(l)=exp(l)/(1+exp(l)).

## ASIN Arcsine function

ASIN(x) returns the arcsine of x.

## ATAN Arctangent function

ATAN(x) returns the arctangent of x.

## COS Cosine function

COS(x) returns the cosine of an angle x. The result range is [-1..1].

## EXP Natural exponential function

EXP(x) returns the natural exponential of x: 2.71828x.

## FACT Factorial function

FACT(x) returns the factorial of x. The factorial of a number n is equal to 1*2*3*...*n.

## INT Integer value function

INT(x) rounds the number x down to an integer.

## LN Natural logarithm function

LN(x) returns the natural logarithm of the positive number x to the base e (e = 2.71828).

## LOG Logarithm function

LOG(x) returns the logarithm of the positive number x in the base 10.

## LOGIT Logit function

LOGIT(p) returns the logit of the proportion p: logit(p)=log(p/(1-p)).

## MOD Modulo function

MOD(x,d) returns the remainder after x is divided by d.

## PI Pi function

The function Pi() takes no argument and returns the value 3.14159265358979.

## POWER Power function

POWER(n,p) returns n raised to the power p.

## RAND Random number function (Uniform distribution)

RAND(x) returns a computer-generated random number (a) when x < 1 the result is a number between 0 and 1, or (b) when x > 1 then the result is a number between 1 and x.

## RANDNORM Random number function (Normal distribution)

The function RANDNORM(m,s) returns a random number from a Normal distribution with mean m and standard deviation s.

## ROUND Round function

ROUND(x,n) rounds the number x to the number of digits n. If n is negative, then x is rounded to the left of the decimal point.

## SIGN Sign value

SIGN(x) returns a number that indicates the sign x: -1 if x is negative; 0 if x equals 0; or 1 if x is positive.

## SIN Sine function

SIN(x) returns the sine of the angle x.

## SQRT Square root function

SQRT(x) returns the square root of the positive number x. SQRT(x) = x^(1/2). If the argument x of the function is negative, then the function returns an error (missing value).

## TAN Tangent function

TAN(x) returns the tangent of the angle x.

## TRUNC Truncate function

TRUNC(x) truncates the number x to an integer by removing the fractional part of the number x.