---
name: "gbinterp"
section: "1"
platform: "linux"
package: "gbutils"
version: "6.3-1+b1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/gbinterp"
---

# gbinterp(1)

Compute equispaced curve from interpolated

## NAME

gbinterp - Compute equispaced curve from interpolated

## SYNOPSIS

**gbinterp** \[*options*\]

## DESCRIPTION

Compute the interpolating function of user provided data on a regular mesh. Data are read from standard input as couples (X,Y). The interpolation (x, f(x)) is printed for x in \[rmin,rmax\]. When rmin=rmax print a single value. With option **-I** the points where the interpolation is computed are read from a file.

## OPTIONS

- **-n**

  number of equispaced points (default 10)

- **-r**

  set the range 'rmin,rmax'   (default full x range)

- **-I**

  read interpolation points from a file

- **-M**

  the interpolation method: (default 0)

- 0

  linear       (requires at least 2 points)

- 1

  cspline      (requires at least 3 points)

- 2

  Akima spline (requires at least 5 points)

- **-O**

  the type of output: (default 0)

- 0

  interpolation

- 1

  first derivative

- 2

  second derivative

- **-F**

  specify the input fields separators (default " \\t")

- **-h**

  print this help

- **-v**

  verbose mode

## AUTHOR

Written by Giulio Bottazzi

## REPORTING BUGS

Report bugs to \<gbutils@googlegroups.com\>

Package home page \<http://cafim.sssup.it/~giulio/software/gbutils/index.html\>

## COPYRIGHT

Copyright © 2001-2018 Giulio Bottazzi This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License (version 2) as published by the Free Software Foundation;

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.