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