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NEWS.7.md: Clarify whitespace rules with inplace and binary operators (bug #62552).
author Markus Mützel <markus.muetzel@gmx.de>
date Thu, 02 Jun 2022 14:47:55 +0200
parents 28d63e8bcaa7
children 20c9d48487e3 b4a6ea55154f
comparison
equal deleted inserted replaced
31052:28d63e8bcaa7 31054:201e29541ef5
86 between these operators and the variable they affect were allowed. That 86 between these operators and the variable they affect were allowed. That
87 is no longer the case. 87 is no longer the case.
88 88
89 - For compatibility with command syntax, inplace operators (`+=`, `-=`, 89 - For compatibility with command syntax, inplace operators (`+=`, `-=`,
90 `*=`, `.*=`, `/=`, `./=`, `\=`, `.\=`, `^=`, `.^=`, `|=`, `&=`) must now 90 `*=`, `.*=`, `/=`, `./=`, `\=`, `.\=`, `^=`, `.^=`, `|=`, `&=`) must now
91 be followed by a whitespace character. That was not a requirement in 91 either be followed by a whitespace character or must not be preceded by a
92 previous versions of Octave. 92 whitespace character. For commands with binary operators (`+`, `-`, `*`,
93 `.*`, `/`, `./`, `\`, `.\`, `^`, `.^`, `|`, `&`, `||`, `&&`) without
94 assignment, the same rules apply. That was not a requirement in previous
95 versions of Octave.
96 E.g., `a + b`, `a+ b`, or `a+b` are valid if `a` is a variable. In
97 contrast, `a +b` will throw an error if `a` is a variable. The latter
98 example is now interpreted as command syntax expression equivalent to the
99 function syntax expression `a ("+b")`.
93 100
94 - The `mldivide` function (i.e., the `\` operator) now uses an LU 101 - The `mldivide` function (i.e., the `\` operator) now uses an LU
95 decomposition to solve nearly singular full square matrices. This is 102 decomposition to solve nearly singular full square matrices. This is
96 Matlab-compatible and yields results which more nearly minimize `norm 103 Matlab-compatible and yields results which more nearly minimize `norm
97 (A*x - b)`. Previously, Octave computed a minimum-norm solution. 104 (A*x - b)`. Previously, Octave computed a minimum-norm solution.