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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
234 R Programming for Bioinformatics
Exercise 8.2
Use the function ppc from Exercise 2.16 to create a new function that can find
and return the probes that map to any chromosome (just prepend the caret
to the chromosome numb er) or the chromosome number with a p or a q after
it.
8.2.3 Ecient apply-like functions
While the apply family of functions provides a very useful abstraction and
a succinct notation, its generality precludes a truly ecient implementation.
For this reason there are other, more ecient functions, for tasks that are
often performed, provided in R and in some add-on packages. These include
rowSums, rowMeans, colSums and colMeans,
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Publisher Resources

ISBN: 9781420063677