solomonB

I was wondering if anyone had any useful ways of measuring rate of change in a variable? Are there any particular externals or abstractions that are useful for this?

how-to-measure-rate-of-change

> I was wondering if anyone had any useful ways of measuring rate of 

> Are there any particular externals or abstractions that are useful 

Probably lots of them, for example jcom.delta.

> I was wondering if anyone had any useful ways of measuring rate of  
> change in a variable?

> Are there any particular externals or abstractions that are useful  
> for this?

Is it something like this you are looking for?

I would use a combination of 'table' and 'expr', but it all depends on details.. couldn't help you there!

Those are both good solutions depending on the specific situation (I have a lot of situations to deal with right now). This should be a good starting point for me.

What is jcom.delta? A google search did not reveal anything.

Those are both good solutions depending on the specific situation (I have a lot of situations to deal with right now). This should be a good starting point for me. 

What is jcom.delta? A google search did not reveal anything.


Trond Lossius has, IIRC, blessed the world with an object for this.

> I was wondering if anyone had any useful ways of measuring rate of

> change in a variable? Are there any particular externals or

> abstractions that are useful for this? 

Solomon Bothwell wrote:
> I was wondering if anyone had any useful ways of measuring rate of
> change in a variable? Are there any particular externals or
> abstractions that are useful for this? 
>
>


i think i got this from gregory taylor
it is very useful

> What is jcom.delta? A google search did not reveal anything.

You can find it as part of Jamoma:
http://www.jamoma.org/
It is equal to tl.delta.

Woah this patch is perfect. Thank you everyone.

That patch is great. The smoothing idea (recursive scaling of numbers) is so simple but fundamental to data management.

Also the "instantaneous derivative" idea --- I had thought you'd need to bust out the calculus book for formula-based derivatives, and sometimes you could (to get the actual full formula like for polynomials), but this version works on a point-by-point basis over change through a simple subtraction (delta). Also very fundamental and helpful to my understanding of the math involved, thanks!

That patch is great. The smoothing idea (recursive scaling of numbers) is so simple but fundamental to data management. 

How to measure rate of change