Scilab Website | Contribute with GitLab | Mailing list archives | ATOMS toolboxes
Scilab Online Help
5.5.2 - English

Change language to:
Français - 日本語 - Português - Русский

Please note that the recommended version of Scilab is 2025.0.0. This page might be outdated.
See the recommended documentation of this function

Scilab Help >> Elementary Functions > Floating point > clean

clean

cleans matrices (round to zero small entries)

Calling Sequence

B=clean(A [,epsa [,epsr]])

Arguments

A

a numerical matrix (scalar, polynomial, sparse, ...).

epsa, epsr

real numbers. Cleaning tolerances (default values resp. 1.d-10 and 1.d-10).

Description

This function eliminates (i.e. set to zero) all the coefficients with absolute value < epsa or relative value < epsr (relative means relative w.r.t. 1-norm of coefficients) in a polynomial (possibly matrix polynomial or rational matrix).

Default values are epsa=1.d-10 and epsr=1.d-10;

For a constant (non-polynomial) matrix clean(A,epsa) sets to zero all entries of A smaller than epsa.

Examples

x=poly(0,'x');
w=[x,1,2+x;3+x,2-x,x^2;1,2,3+x]/3;
w*inv(w)
clean(w*inv(w))
Report an issue
<< ceil Floating point double >>

Copyright (c) 2022-2024 (Dassault Systèmes)
Copyright (c) 2017-2022 (ESI Group)
Copyright (c) 2011-2017 (Scilab Enterprises)
Copyright (c) 1989-2012 (INRIA)
Copyright (c) 1989-2007 (ENPC)
with contributors
Last updated:
Wed Apr 01 10:13:52 CEST 2015