Interpolation for Calc

Tags: Calc Extension

Rating: ★ ★ ★ ★ ★

This Add-in contain function to solve interpolations and extrapolation tasks.

Description

The objective of this add-in is to create easy-call functions to interpolate and extrapolate.

Developed by: Manuel Astros (manuel.astros1980@gmail.com) July 2018

https://sites.google.com/view/interpolation/home

All functions were developed to behave in the same way that the interpolation add-in created by Jose Ivan Martinez Garcia for Excel.
It will make possible a kind of interoperability among LibreOffice-Calc, Google-sheet in interpolation matter.

The Help for the usage of this Interpolation Add in can be found published in http://personales.gestion.unican.es/martinji/Interpolation.htm

Packaged Functions included in this add-in until now:
interpo(x, XRange, YRange) Linear interpolation with one parameter and two source ranges
interpo2(x, y, Range) Linear interpolation with two parameters and a table source
cercha(x, Range, keyArg, v1, v2) Spline interpolation with one parameter and a table source range
cerchapi(Range, keyArg, v1, v2) Determine the initial slope (1st derivative) at the first point of first spline
cerchapf(Range, keyArg, v1, v2)     Determine the final slope at the last point of the last spline
cerchaci(Range, keyArg, v1, v2)     Determine the initial curvature (2nd derivative) at the first point of the first spline
cerchacf(Range, keyArg, v1, v2)     Determine the final curvature (2nd derivative) at the last point of the last spline


Others functions will be added time by time, until all function implemented in the original excel add-in are available in this one.

coming soon: video tutorial, cerchara, cerchamx and cerchamy

Release List

  • Release Description Compatibility Operating Systems License Release notes  
  • 0.3 New functions were added 5.0 Linux, Windows CC-BY
    This release adds new functionalities to the add-in, listed as follow:
    • Determination the initial slope (1st derivative) at the first point of the first spline:

       cerchapi(Range, keyArg, v1, v2)

    • Determination the final slope at the last point of the last spline:

       cerchapf(Range, keyArg, v1, v2)

    • Determination the final slope at the last point of the last spline:

       cerchaci(Range, keyArg, v1, v2)

    •  Determination the final slope at the last point of the last spline:

       cerchacf(Range, keyArg, v1, v2)

     
    Download
  • 0.2 Cubic interpolation function was added cercha(x, Range, keyArg, V1, V2) 5.0 Linux, Windows CC-BY

     

    The idea of this release is adding new functionalities to the add-in, listed as follow:
    • The license was added to the installation package
    • Cubic interpolation with one parameter and a table source range was added:

       cercha(x, Range, keyArg, v1, v2)

     
    Download
  • 0.1 First release for interpolation and extrapolation functions 5.0 Linux, Windows CC-BY

    Packaged Functions included in this addin are:

    interpo: interpo(x, XRange, YRange)
    interpo2: interpo2(x, y, Range)

     

    Others functions will be added time by time, until all function implemented in the original excel add-in are available here.

     

    Coming soon: first two "Cerchas" functions will be added, for cubic interpolation.

     

     

    Download

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Reviews

  • Vashek Vylet Jun 6, 2020, 3:51 AM (35 days ago)

    ★ ★ ★ ★ ★

    I need to correct my previous post, since I found an english manual at
    https://personales.gestion.unican.es/martinji/Interpolation.htm
    It contains enough additional details to raise the rating to 5 stars.

  • Vashek Vylet Jun 6, 2020, 2:53 AM (35 days ago)

    ★ ★ ★ ★ ☆

    Very useful, and works once you figure it out. The problem is that there is no manual in english, and the one in spanish could be more detailed, in particular description of the keyArg, V1 and V2 option. For keyArg, nn and ff (or combinations) are in the examples (I suppose n is for "natural"?), but are there other options available? What are V1 and V2? Derivatives at first and last point? Either full explanation, or a link to another web page containing more details about this would be helpful. I hope these added functions will be included among the Calc Help terms, they are not right now. Thank you for contributing this useful package.

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