# Math channels

Some applications require the recording and graphing of a calculated parameter containing data from one or more measurement channels. PicoLog 6 is equipped with an equation editor to perform simple calculations such as A–B, or more complex functions such as log, sqrt, abs, round, min, max, mean and median.

Math channels are treated like any normal channel, so you can perform functions like alarms, graphing and annotations on them.

## Arithmetic functions  Brackets:    Standard arithmetic functions Power: `x ^ y` Calculates the power of x to y. Exponential: `e ^ x` Calculate the exponent of a value Modulus: `x % y` Calculates the modulus, the remainder of an integer division Factorial: `x!` Compute the factorial of a value Factorial only supports an integer value as argument. Log: `log(x [,base])` Calculate the logarithm of a value, square brackets are optional parameters. Optionally use Log 10: `log10(x)` Calculate the 10-base logarithm of a value. ln: `log(x, e)` Calculate the logarithm to the base e of x Square root: `sqrt(x)` Calculate the square root of a value Absolute: `abs(x)` Calculate the absolute value of a number Ceiling: `ceil(x)` Round a value towards plus infinity Floor: `floor(x)` Round a value towards minus infinity Round: `round(x[, n])` - Round towards nearest integer

## Boolean Operators and: `x and y` Boolean AND two values or: `x or y` Boolean OR two values not: `not x` Boolean NOT value xor: `x xor y` Boolean XOR two values

## Statistical functions Maximum: `max(a, b, c...)` Compares all the values in the list and return the maximum number Minimum: `min(a, b, c...)` Compares all the values in the list and return the minimum number Mean: `mean(a, b, c...)` Computes the mean value from the list of values Median: `median(a, b, c...)` Computes the median value from the list of values

## Trigonometric functions Sine: `sin(x)` Calculate the sine of a value. Cosine: `cos(x)` Calculate the cosine of a value Tangent: `tan(x)` Calculate the tangent of a value

## Special functions

Conditional expression: `operand1 ? operand2 : operand3` - The conditional operator (? :) is a ternary operator (it takes three operands). E.g. `x > 0 ? x*4 : x*3`  The conditional operator works as follows:

• If operand1 evaluates to true, operand2 is evaluated
• If operand1 evaluates to false, operand3 is evaluated

Device disconnected: `x == disconnected` where x is the data from a channel

## Constants Pi: The number pi is a mathematical constant that is the ratio of a circle's circumference to its diameter (3.141592653589793)

## Scientific notation

`1.4e3` = 1400

`22e-3` = 0.022