Re: [math] Compute derivatives for bidimensional interpolated function
Le mer. 20 juil. 2022 à 21:34, Alessandro Moscatelli a écrit : > > It seems that the SplineInterpolator per row/columns is exactly what the > depracted Cubic Interpolator was doing. > So, nevermind, I got my answer. It made sense indeed. > > Looking further into the code for PR porpuses. Great, thanks! Gilles - To unsubscribe, e-mail: user-unsubscr...@commons.apache.org For additional commands, e-mail: user-h...@commons.apache.org
R: [math] Compute derivatives for bidimensional interpolated function
It seems that the SplineInterpolator per row/columns is exactly what the
depracted Cubic Interpolator was doing.
So, nevermind, I got my answer. It made sense indeed.
Looking further into the code for PR porpuses.
Thank you
Alessandro
Da: Alessandro Moscatelli<mailto:alessandro.moscate...@live.com>
Inviato: mercoledì 20 luglio 2022 15:01
A: Commons Users List<mailto:user@commons.apache.org>
Oggetto: R: [math] Compute derivatives for bidimensional interpolated function
We are talking about making a PR, am I right ?
So, I guess, there is no way to do this at the moment.
Isn’t there any way to combine multiple UnivariateDifferentiableFunction and/or
DerivativeStructure computed on different free parameters (es x and y) ?
I dunno if I am exaplining this correctly :
I am talking about using a SplineInterpolator to compute multiple
SplineInterpolatorFunction, one for each row and column of the grid …
Can this make sense ?
Anyway I’ll take a look at the source code and try to understand what’s needed
to make BicubicInterpolatingFunction an implementation for that new interface
BivariateDifferentiableFunction.
Thank you
Alessandro
Da: Gilles Sadowski<mailto:gillese...@gmail.com>
Inviato: mercoledì 20 luglio 2022 14:10
A: Commons Users List<mailto:user@commons.apache.org>
Oggetto: Re: [math] Compute derivatives for bidimensional interpolated function
Hello.
Le mer. 20 juil. 2022 à 12:29, Alessandro Moscatelli
a écrit :
>
> Hi everybody !
>
> I have an xyz grid of points.
> I want to interpolate and compute derivations along x, along y, and along xy.
>
> If I understood correctly, I can’t use PiecewiseBicubicSplineInterpolator
> (this was my first attempt), since it interpolates into
> PiecewiseBicubicSplineInterpolatingFunction which doesn’t implements
> MultivariateDifferentiableFunction .
>
> I need a function able to return DerivativeStructure, am I right ?
I think so.
>
> Then I double checked and found a deprecated BicubicSplineInterpolator.
> That interpolator lets me directly compute derivatives I need.
This class does not exist in the development version that will become
the next major version (4.0).
> Am I missing something ?
> How can I do what I need without using deprecated BicubicSplineInterpolator.
As you suggest, it would be great that you explore how to provide
access to the derivatives (which the interpolating functions are able
to compute, since they are polynomials).
A minimal change would perhaps be that "BicubicInterpolatingFunction"
implements a new "BivariateDifferentiableFunction" interface:
---CUT---
public interface BivariateDifferentiableFunction extends
BinaryOperator
{}
---CUT---
Regards,
Gilles
-
To unsubscribe, e-mail: user-unsubscr...@commons.apache.org
For additional commands, e-mail: user-h...@commons.apache.org
R: [math] Compute derivatives for bidimensional interpolated function
We are talking about making a PR, am I right ?
So, I guess, there is no way to do this at the moment.
Isn’t there any way to combine multiple UnivariateDifferentiableFunction and/or
DerivativeStructure computed on different free parameters (es x and y) ?
I dunno if I am exaplining this correctly :
I am talking about using a SplineInterpolator to compute multiple
SplineInterpolatorFunction, one for each row and column of the grid …
Can this make sense ?
Anyway I’ll take a look at the source code and try to understand what’s needed
to make BicubicInterpolatingFunction an implementation for that new interface
BivariateDifferentiableFunction.
Thank you
Alessandro
Da: Gilles Sadowski<mailto:gillese...@gmail.com>
Inviato: mercoledì 20 luglio 2022 14:10
A: Commons Users List<mailto:user@commons.apache.org>
Oggetto: Re: [math] Compute derivatives for bidimensional interpolated function
Hello.
Le mer. 20 juil. 2022 à 12:29, Alessandro Moscatelli
a écrit :
>
> Hi everybody !
>
> I have an xyz grid of points.
> I want to interpolate and compute derivations along x, along y, and along xy.
>
> If I understood correctly, I can’t use PiecewiseBicubicSplineInterpolator
> (this was my first attempt), since it interpolates into
> PiecewiseBicubicSplineInterpolatingFunction which doesn’t implements
> MultivariateDifferentiableFunction .
>
> I need a function able to return DerivativeStructure, am I right ?
I think so.
>
> Then I double checked and found a deprecated BicubicSplineInterpolator.
> That interpolator lets me directly compute derivatives I need.
This class does not exist in the development version that will become
the next major version (4.0).
> Am I missing something ?
> How can I do what I need without using deprecated BicubicSplineInterpolator.
As you suggest, it would be great that you explore how to provide
access to the derivatives (which the interpolating functions are able
to compute, since they are polynomials).
A minimal change would perhaps be that "BicubicInterpolatingFunction"
implements a new "BivariateDifferentiableFunction" interface:
---CUT---
public interface BivariateDifferentiableFunction extends
BinaryOperator
{}
---CUT---
Regards,
Gilles
-
To unsubscribe, e-mail: user-unsubscr...@commons.apache.org
For additional commands, e-mail: user-h...@commons.apache.org
Re: [math] Compute derivatives for bidimensional interpolated function
Hello.
Le mer. 20 juil. 2022 à 12:29, Alessandro Moscatelli
a écrit :
>
> Hi everybody !
>
> I have an xyz grid of points.
> I want to interpolate and compute derivations along x, along y, and along xy.
>
> If I understood correctly, I can’t use PiecewiseBicubicSplineInterpolator
> (this was my first attempt), since it interpolates into
> PiecewiseBicubicSplineInterpolatingFunction which doesn’t implements
> MultivariateDifferentiableFunction .
>
> I need a function able to return DerivativeStructure, am I right ?
I think so.
>
> Then I double checked and found a deprecated BicubicSplineInterpolator.
> That interpolator lets me directly compute derivatives I need.
This class does not exist in the development version that will become
the next major version (4.0).
> Am I missing something ?
> How can I do what I need without using deprecated BicubicSplineInterpolator.
As you suggest, it would be great that you explore how to provide
access to the derivatives (which the interpolating functions are able
to compute, since they are polynomials).
A minimal change would perhaps be that "BicubicInterpolatingFunction"
implements a new "BivariateDifferentiableFunction" interface:
---CUT---
public interface BivariateDifferentiableFunction extends
BinaryOperator
{}
---CUT---
Regards,
Gilles
-
To unsubscribe, e-mail: user-unsubscr...@commons.apache.org
For additional commands, e-mail: user-h...@commons.apache.org
[math] Compute derivatives for bidimensional interpolated function
Hi everybody ! I have an xyz grid of points. I want to interpolate and compute derivations along x, along y, and along xy. If I understood correctly, I can’t use PiecewiseBicubicSplineInterpolator (this was my first attempt), since it interpolates into PiecewiseBicubicSplineInterpolatingFunction which doesn’t implements MultivariateDifferentiableFunction . I need a function able to return DerivativeStructure, am I right ? Then I double checked and found a deprecated BicubicSplineInterpolator. That interpolator lets me directly compute derivatives I need. Am I missing something ? How can I do what I need without using deprecated BicubicSplineInterpolator. Thank you in advance Alessandro Moscatelli
