For each factor variable in a vector, tapply() computes a measure (mean, median, min, max, etc.) or a function. It's a helpful function that allows you to construct a subset of a vector and then apply functions to each subset separately.
The apply() family is part of the R base package and contains methods for repetitively manipulating slices of data from matrices, arrays, lists, and dataframes. These routines allow you to cross data in a variety of ways without having to utilise loop constructs explicitly.
For an example of a specific tapply method, see tapply,Vector,ANY-method in the IRanges package (defined for Vector objects).
Learner's Ratings
4.2
Overall Rating
67%
19%
4%
3%
7%
Reviews
A
ajay kumar mishra
5
I AM WAITING FOR LONG TIME THIS COURSE
THANKS FOR UPLOAD THIS COURSE
AGAIN THANKS ALL TEAM MEMBERS
K
Khurram
5
so far so good
M
Meet Shah
5
Get impressed by your way of teaching. Good and interesting. this is very helpful. Thank you :)
P
Prabhat Yadav
5
Amazing content and easy to understand.
A
Ankush Kumar
5
Much better for biggner
M
Muhammad Farooq
5
I have Zero knowledge of programming but with this video got some information " What R is " I hope with little more practice can do better than this one. Thanks
M
manjeet
5
Very help full course
R
Rajachandra Voodiga
4
very well explained
A
Amol Barkule
4
The R Programming Course was good and included all the topics to find a good job in my City.
L
Laxman
5
The R Programming Course was good and included all the topics to find a good job in my City.
Share a personalized message with your friends.