ContentTop, Main, Index

This package provides tcl wrapper for interpolation and approximation procedures. The sources of procedures are:

• Linear interpolation routines
• Spline interpolation and approximation routines

Installation and dependenciesTop, Main, Index

For building you need:

• SWIG of version 4.3
• Tcl9 or Tcl8.6.15
• gcc compiler
• make tool

For run you also need:

• argparse
• Tcllib

To build run

./configure
make
sudo make install

If you have different versions of Tcl on the same machine, you can set the path to this version with -with-tcl=path flag to configure script.

For Windows build it is strongly recommended to use MSYS64 UCRT64 environment, the above steps are identical if you run it from UCRT64 shell.

There are prebuilt packages that contains .so/.dll files, tcl code and tests for Windows and Linux.

Supported platformsTop, Main, Index

I've tested it on:

• Kubuntu 24.04 with Tcl 9 and Tcl 8.6.15
• Windows 11 in MSYS64 UCRT64 environment with Tcl9

DocumentationTop, Main, Index

You can find some documentation here

Interactive helpTop, Main, Index

All public procedures has interactive help. To get information about procedure and its arguments call it with -help switch:

package require tclinterp
namespace import ::tclinterp::interpolation::*
near1d -help

Does nearest one-dimensional interpolation. Returns: list of interpolated
dependent variable values, 'yi', at 'xi'. Can accepts unambiguous prefixes
instead of switches names. Accepts switches only before parameters.
Switches:
-x - Required, expects argument. List of independent variable (x)
values, must be strictly increasing.
-y - Required, expects argument. List of dependent variable (y) values.
-xi - Required, expects argument. list of independent variable
interpolation (xi) values.

Best to do it in interactive console, see tkcon