ised: numeric sequence editor

ised is a command-line tool for generating number sequences and arithmetic evaluation. Unlike big gui-based software (e.g. Mathematica, Derive, Matlab, Octave,...) it is intended for use in shell scripting, together with gnu core utilities.
Its main advantage is that all functions are generalized to operate on one-dimensional arrays. It can be used for loop indexing (much like seq), line-by-line arithmetic processing of files, floating point math for shells that don't support it natively, or interactively, as extended calculator.
Since version 2.3.0, ised is Turing complete.

Modes of operation

interactive mode

if called without arguments, ised opens a command prompt, which works as extended text-based calculator. In this mode, command history is enabled (via gnu readline library).

one-liners

ised evaluates its arguments as numeric expressions. It provides the ability to handle floating point expressions for shells which don't support it natively, for example bash.

as a filter

ised can be used to apply an expression to every line of input, given as a file or standard input. It provides a way for manipulation of numeric data and works well in a pipeline with other core utilities.

Features

• Generalization of arithmetic operators for arrays.
• Simple syntax, compatible with c-like programming languages when working with scalars.
• Implementation of all basic algebraic functions.
• Smart generalization of integer operators to floating point numbers.
• Extensive set of operators for array manipulation.
• Powerful built-in sequence generators.
• Basic memory management.
• Function declaration and execution with flow control.

Distro packages

Development