On Tue, 16 Feb 2016, Summers, Peter wrote:
Clive,
The arguments to seq() all have to be integers. Try replacing that line
with “matrix x = seq(-30,32,2)./10”
Yes, this is true. However, in the development version (which is what
Artur is using) we relaxed the "integer" constraint and the code he posted
is perfectly legal. That'll be part of grel 2016b.
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Riccardo (Jack) Lucchetti
Dipartimento di Scienze Economiche e Sociali (DiSES)
Università Politecnica delle Marche
(formerly known as Università di Ancona)
r.lucchetti(a)univpm.it
http://www2.econ.univpm.it/servizi/hpp/lucchetti
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