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clear all variables except specific ones

From: dariodematties
Subject: clear all variables except specific ones
Date: Sat, 12 Aug 2017 06:30:29 -0700 (PDT)

Hello People,

How can I clear all variables except a specific subset from them?

There is a function called clearvars in matlab but it is not implemented in
my version of Octave.

octave:24> ver
GNU Octave Version: 4.2.0
GNU Octave License: GNU General Public License
Operating System: Linux 4.4.0-89-generic #112~14.04.1-Ubuntu SMP Tue Aug 1
22:08:32 UTC 2017 x86_64
Package Name  | Version | Installation directory
     control  |   3.0.0 | /home/dario/octave/control-3.0.0
          io  |   2.4.5 | /home/dario/octave/io-2.4.5
       ltfat  |   2.1.2 | /home/dario/octave/ltfat-2.1.2
    parallel  |   3.1.1 | /home/dario/octave/parallel-3.1.1
      signal  |   1.3.2 | /home/dario/octave/signal-1.3.2
  statistics  |   1.3.0 | /home/dario/octave/statistics-1.3.0
      struct  |  1.0.14 | /home/dario/octave/struct-1.0.14

octave:25> help clearvars
error: help: the 'clearvars' function is not yet implemented in Octave


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