Skip to Main Content
R Programming for Bioinformatics
book

R Programming for Bioinformatics

by Robert Gentleman
July 2008
Intermediate to advanced content levelIntermediate to advanced
328 pages
10h 53m
English
Chapman and Hall/CRC
Content preview from R Programming for Bioinformatics
R Language Fundamentals 15
that apply to zero length vectors for those computations. Here we describe
their behavior in other settings.
Functions such as sum and prod take as input one or more vectors and pro-
duce a value of length one. It is helpful if simple rules, such as
sum(c(x,y)) = sum(x) + sum(y), hold. Similarly for prod we expect
prod(c(x,y)) = prod(x)*prod(y). For these to hold, we require that the
sum of a zero length vector be zero and that the product of a zero length
vector be one.
> sum(numeric())
[1] 0
> prod(numeric())
[1] 1
For other mathematical functions, such as gamma or log, the same logic
suggests that these functions should return ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Start your free trial

You might also like

Computation in BioInformatics

Computation in BioInformatics

S. Balamurugan, Anand T. Krishnan, Dinesh Goyal, Balakumar Chandrasekaran, Boomi Pandi
R for Data Science Cookbook (n)

R for Data Science Cookbook (n)

Prabhanjan Narayanachar Tattar, Yu-Wei, Chiu (David Chiu)

Publisher Resources

ISBN: 9781420063677