Re: Adding some new transformations to gnuplot (arctan and power laws)

[<pl...@pi...>]

Philipp K. Janert wrote:
> I'd like to add one thing to Ethan's list: The current
> log-scale does not play well with the "smooth" 
> algorithms, such as "smooth frequency". I have 
> not analyzed the root cause of this behavior in 
> detail, but I can certainly see how it comes about
> given the entire complex of issues that Ethan has 
> scoped in his email.
> 
> So, there is yet another reason why it would be
> nice to be able to apply transformations for display
> purposes as late in the game as possible, so that
> earlier operations on the data (such as "smooth freq"
> or "smooth kdens") succeed.
> 
> Best,
> 
> 		Ph.


I agree will general comments about this should be done as late as 
possible as display processing and original data kept.

However I just wondered about when smoothing should be applied.

If you have a logrithmic effect you presumably want smoothing of the log 
not the data. But smooth unique may want to be done first?? This may not 
be a case of one correct answer. I suspect it would need a switch to 
specify when this processing is done.

smooth unique before , smooth cspline after ??

/Peter.