LOWPASS Forumla

but unless you know what e is or what exp does, a user still can't replicate the formula. It still needs more detail in the docs.

rodw wrote: but unless you know what e is or what exp does, a user still can't replicate the formula. It still needs more detail in the docs.

I'll take care of this when I'm done with the holiday. Seb has cherry picked the addition to 2.7 so it should show up in the on line documents in a while and I'll expand the example with more information so a non math person can calculate it in the morning. Then the addition will get pushed to master.

JT

Ok the documents have been updated and are online.

linuxcnc.org/docs/2.7/html/man/man9/lowpass.9.html

JT

John, looks great thanks. Appreciate your help.

Its little things like these that increase traffic on the forum as users don't have the info they need to implement a feature of Linuxcnc.

Python 2.7.13 on my Stretch machine does use ** for the power operator

phill@stretch:~$ python
Python 2.7.13 (default, Nov 24 2017, 17:33:09)
[GCC 6.3.0 20170516] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> 6**2
36
>>> 6.001**2
36.012001000000005

or

It was in reference to "The two languages this project use are C and Python. Neither use **." from post #113764

Fortran has always used ** for exponentiation. That does not make it right or wrong for linuxcnc, but it is not just something that Sinclair or any other bit player invented.

Fortran is no longer well known by mere mortals, but it is still very important for supercomputing.