ddt - Compute the derivative of the input function

       Jeff Epler

       For  every  function call from the real time thread, calculate the difference between the old and current
       input value divided by the timer elapsed since the last call.

ddt.N (requires a floating-point thread)

       GPL

LinuxCNC Documentation                             2025-08-07                                             DDT(9)

       ddt - Compute the derivative of the input function

       As this only work on two consecutive input values, it will only work  well  if  the  input  change  every
       function  call, and not work so well if the rate of change is very low and the input change do not happen
       every time the real time function is called.

ddt.N.in float in
       ddt.N.out float out

loadrtddt[count=N|names=name1[,name2...]]