# Equations

From Torque OBD2 Wiki

Jump to navigationJump to searchThe PID Editor contains a resonably power equation editor that allows you to manipulate the incoming data from an OBD device, Sensor, or other data input to the app

## Functions

The equation editor supports the following functions

- EWMA(weight, value) Exponentially weighted moving average filter - filter noisy signals here

- TDLY(seconds, value) Time based delay - data be delayed by 'seconds' amount before being returned. Returns 0 until data buffer is full

- RDLY(seconds, value) Read based delay - data is delayed by X polling loops before being returned

- TOT(seconds, value) Totalizer function based upon difference from time/value

- TAVG(seconds, value) Timed average. This averages the incoming data for the configured amount of time (in seconds). Data older than the configured time is removed from being averaged

- RAVG(value) Rolling average. This averages incoming values until it is reset. No values are removed from the average until it is reset.

- AVG(bucketSize, value) Point average. This averages incoming values from a bucket of s set size. The bucket can be configured to average a set amount of values, so AVG(10,value) would average the last 10 values

- SIN(value), COS(value) ,TAN(value). Trigonometric functions are supported

- LOG(value) Returns the natural logarithm (base e) of a value

- LOG10(value) Returns the base 10 logarithm of a value

- LOG1P(value) Returns the natural logarithm of the sum of the value and 1

- INT(value) Converts the incoming number to an integer

- SQRT(value) Returns the correctly rounded positive square root of a value.

- ABS(value). Returns the absolute value of the number given

- SIGNED(value) Treats the incoming value as 8bit signed

- RANDOM() Returns a random number between 0 and 1

- BARO() Returns the barometric pressure from the android device or measured from the vehicle ECU if it supports it in psi