Search icon CANCEL
Subscription
0
Cart icon
Your Cart (0 item)
Close icon
You have no products in your basket yet
Arrow left icon
Explore Products
Best Sellers
New Releases
Books
Videos
Audiobooks
Learning Hub
Conferences
Free Learning
Arrow right icon
Arrow up icon
GO TO TOP
R Object-oriented Programming

You're reading from   R Object-oriented Programming A practical guide to help you learn and understand the programming techniques necessary to exploit the full power of R

Arrow left icon
Product type Paperback
Published in Oct 2014
Publisher
ISBN-13 9781783986682
Length 190 pages
Edition 1st Edition
Languages
Arrow right icon
Author (1):
Arrow left icon
Kelly Black Kelly Black
Author Profile Icon Kelly Black
Kelly Black
Arrow right icon
View More author details
Toc

Miscellaneous notes

In the previous sections, we discussed how to create a new class as well as how to define a hierarchy of classes. We will now discuss four commands that are helpful when working with classes: the slotNames, getSlots, getClass, and slot commands. Each command is briefly discussed in turn, and it is assumed that the Ant, FemaleAnt, and WorkerAnt classes that are given in the previous section are defined in the current workspace.

The first command, the slotnames command, is used to list the data components of an object of some class. It returns the names of each component as a vector of characters:

> worker <- WorkerAnt(Position=c(1,2,3),Length=5.6)
> slotNames(worker)
[1] "Foraging"      "Alarm"         "Food"          "Length"       
[5] "Position"      "pA"            "pI"            "ActivityLevel"

The getSlots command is similar to the slotNames command. The difference is that the...

lock icon The rest of the chapter is locked
Register for a free Packt account to unlock a world of extra content!
A free Packt account unlocks extra newsletters, articles, discounted offers, and much more. Start advancing your knowledge today.
Unlock this book and the full library FREE for 7 days
Get unlimited access to 7000+ expert-authored eBooks and videos courses covering every tech area you can think of
Renews at $19.99/month. Cancel anytime
Banner background image