Version 3.1.1 (R13) Spline Toolbox Software :: Spline Toolbox Release Notes (Spline Toolbox™)

Version 3.1.1 (R13) Spline Toolbox Software

This table summarizes what's new in Version 3.1.1 (R13):

New Features and Changes	Version Compatibility Considerations	Fixed Bugs and Known Problems	Related Documentation at Web Site
Yes Details below	Yes—Details listed under Compatibility Consideration, below. See also Summary	Fixed bugs	Printable Release Notes: PDF Current product documentation

New features and changes introduced in this version are

Smoothing Splines for Scattered Bivariate Data

The new command tpaps enables you to create thin-plate spline approximations f that satisfy, approximately or exactly, the equation for given data values z at given scattered data sites (x,y) in the plane. The associated collocation matrix is provided by stcol. You can also create the first-order derivatives of a thin-plate spline.

The spline created by tpaps is in stform, as are its first-order derivatives. You can create an stform directly from its centers and coefficients using stmak. As with all forms, you can evaluate the splines in stform with fnval, plot them with fnplt, etc.

See "Fitting Values at Scattered 2-D Sites" and "The stform" in the Spline Toolbox documentation for more information.

splinetool Command History M-File

In the Spline Tool GUI (splinetool), you can now generate a function M-file that you can use to generate, from the original data, any or all graphs currently in the GUI. Select File -> Save M-File to save the M-file.

This M-file also provides you with a written record of the Spline Toolbox commands used to generate the current graph(s), and can be edited, or executed in a loop over different data sets.

Spline-Specific Zero Finder

A new command fnzeros enables you to find an ordered list of the zeros of a univariate, scalar-valued spline, in its basic interval or in a specified interval.

Spline-Specific Minimum Finder

A new command fnmin enables you to obtain the minimum or maximum value of a univariate, scalar-valued spline as well as its location, in its basic interval or in a specified interval.

Function Summary

Version 3.1 of Spline Toolbox provides the following:

New Functions

Function	Purpose
`fnmin`	Minimum of a function in a given interval
`fnzeros`	Find zeros of a function in a given interval
`stcol`	Scattered translates collocation matrix
`stmak`	Put together a function in stform
`tpaps`	Thin-plate smoothing spline

Functions with New or Changed Capabilities

Function	Purpose
`fnbrk`	A new value of the `part` argument, `'variables'`, causes `fnbrk` to return the number of variables of the specified function.
`fnrfn`	As a new default, `fnrfn` now refines the partition (breaks or knots) of the given form by adding to it every midpoint. `fnrfn` previously had no default.
`splinetool`	`splinetool` now permits the entry of a vector whose elements replace that many entries in the weights display, starting with the marked entry.
`csaps` `fnbrk` `fnplt` `optknt` `slvblk` `spaps` `spcol` `spcrv`	These functions now treat an empty optional argument the same as not having that optional argument.

Compatibility Consideration

playshow Command Needed to Run Slideshow Style Demos

Starting in R13, to run slideshow style demos from the command line, you must use the playshow command. For example,

playshow splexmpl

You can continue to run other styles of demos from the command line by typing just the demo name. Spline Toolbox demos that are affected: splexmpl, histodem, ppalldem, spapidem, getcurv2, and spalldem.

Version 3.2 (R13+) Spline Toolbox Software

Compatibility Summary for Spline Toolbox Software

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