I?d like to control the number of tick marks on the ?x? axis of a plot, when the variable there is dates. I thought to use the xaxp parameter, but the documentation for par says ?It [i.e., xaxp] is only relevant to default numeric axis systems, and not for example to dates.? My question, then, is how to control the number of ticks on an axis that represents dates?
Controlling plot axis for dates
2 messages · David Parkhurst, Brian Ripley
On 27/02/2014 17:09, David Parkhurst wrote:
I?d like to control the number of tick marks on the ?x? axis of a plot, when the variable there is dates. I thought to use the xaxp parameter, but the documentation for par says ?It [i.e., xaxp] is only relevant to default numeric axis systems, and not for example to dates.? My question, then, is how to control the number of ticks on an axis that represents dates?
See ?Axis and ?axis.Date .
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Please do. It is not clear which plot method it was that produced dates, although it is a fair guess that it called Axis().
Brian D. Ripley, ripley at stats.ox.ac.uk Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595