[Rd] Recycling in arithmetic operations involving zero-length vectors
Roland Fuß
ro|@nd@|u@@ @end|ng |rom thuenen@de
Mon Jan 16 11:23:47 CET 2023
Dear R-core,
The language definition is very clear:
"As from R 1.4.0, any arithmetic operation involving a zero-length
vector has a zero-length result."
Thus, `1 + numeric()` returns `numeric(0)`. However, I don't find this
very intuitive because usually the shorter vector is recycled to the
length of the longer vector. Would it be possible to throw at least a
warning for such cases? I don't expect them to be intended by most users.
Best regards,
--
Dr. Roland Fuß
Thünen-Institut für Agrarklimaschutz/
Thünen Institute of Climate-Smart Agriculture
Bundesallee 65
D-38116 Braunschweig, Germany
Tel.: ++49 531 596 2627
Fax: ++49 531 596 2699
Email: roland.fuss using thuenen.de
Arbeitsgruppe "Emissionsberichterstattung"/
Working group "Emission Inventories"
Email: emissionsinventare using thuenen.de
Das Johann Heinrich von Thünen-Institut,
Bundesforschungsinstitut für Ländliche Räume,
Wald und Fischerei – kurz: Thünen-Institut –
besteht aus 15 Fachinstituten, die in den
Bereichen Ökonomie, Ökologie und Technologie
forschen und die Politik beraten.
The Johann Heinrich von Thünen Institute,
Federal Research Institute for Rural Areas,
Forestry and Fisheries – Thünen Institute in brief –
consists of 15 specialized institutes that
carry out research and provide policy advice
in the fields of economy, ecology and technology.
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