Hi Salvo,
I have just created a tag for the programs in Gitlab with a version compatible for Free42 2.5.24 (or above):
https://gitlab.com/fmartinp/programs42/-/tree/1.0.0
I have just decided to remove the raw files since anyone can generate them from the text files.
On the other hand, have you succeeded running the DERIV program? I believe that maybe you forgot to set the ORDER of the derivative.
Regards,
Fernando
As example, I will reproduce here the operations to run it.
1) Create the FX
LBL "FX"
MVAR "X"
1
RCL+ "X"
1/x
END
2) Run XEQ "DERIV"
3) When the program stops with the message "Select f(x) Program", type "FX" in the Alpha register
4) Press R/S
5) When the program stops with the message "Set Vars; Select Var", type the evaluation point (for instance 1) and the press in the soft menu X. Press again on X
6) In the DERIV menu:
7) type the derivative order that you would like to compute (for instance, 3 for third derivative) and press ORDER in the soft menu.
8) then press DERIV. The other options is to change the order of accuracy (which is automatically set to ORDER+2, when the ORDER is introduced.
That should be enough to get the result. I hope that this information helps you.