W3cubDocs

/Octave

1.3.2 Evaluation Notation

In the examples in this manual, results from expressions that you evaluate are indicated with ‘’. For example:

sqrt (2)
     ⇒ 1.4142

You can read this as “sqrt (2) evaluates to 1.4142”.

In some cases, matrix values that are returned by expressions are displayed like this

[1, 2; 3, 4] == [1, 3; 2, 4]
     ⇒ [ 1, 0; 0, 1 ]

and in other cases, they are displayed like this

eye (3)
     ⇒  1  0  0
         0  1  0
         0  0  1

in order to clearly show the structure of the result.

Sometimes to help describe one expression, another expression is shown that produces identical results. The exact equivalence of expressions is indicated with ‘’. For example:

rot90 ([1, 2; 3, 4], -1)
≡
rot90 ([1, 2; 3, 4], 3)
≡
rot90 ([1, 2; 3, 4], 7)

© 1996–2018 John W. Eaton
Permission is granted to make and distribute verbatim copies of this manual provided the copyright notice and this permission notice are preserved on all copies.
Permission is granted to copy and distribute modified versions of this manual under the conditions for verbatim copying, provided that the entire resulting derived work is distributed under the terms of a permission notice identical to this one.Permission is granted to copy and distribute translations of this manual into another language, under the above conditions for modified versions.
https://octave.org/doc/interpreter/Evaluation-Notation.html