Download e-book for kindle: A Tiny Handbook of R by Mike Allerhand (auth.)

By Mike Allerhand (auth.)

ISBN-10: 3642179797

ISBN-13: 9783642179792

This short offers a roadmap for the R language and programming setting with signposts to extra assets and documentation.

Show description

Read or Download A Tiny Handbook of R PDF

Best compilers books

Download e-book for iPad: VLSI Design Methodologies for Digital Signal Processing by Magdy A. Bayoumi

VLSI layout Methodologies for electronic sign Processing Architectures is established round a few rising concerns during this region, together with process integration, optimization, set of rules transformation, effect of purposes, reminiscence administration and set of rules prototyping. The publication stimulates the reader to get a head begin, achieve wisdom and perform the swiftly evolving box of software particular layout method for DSP architectures.

Download PDF by Luke VanderHart: Practical Clojure

This booklet is the 1st definitive reference for the Clojure language, offering either an creation to useful programming regularly and a extra particular advent to Clojure's positive aspects. This publication demonstrates using the language via examples, together with positive aspects comparable to software program transactional reminiscence (STM) and immutability, that may be new to programmers coming from different languages.

Download e-book for kindle: Optimizing HPC Applications with Intel® Cluster Tools by Alexander Supalov, Andrey Semin, Christopher Dahnken,

Optimizing HPC purposes with Intel® Cluster instruments takes the reader on a journey of the fast-growing quarter of excessive functionality computing and the optimization of hybrid courses. those courses normally mix allotted reminiscence and shared reminiscence programming types and use the Message Passing Interface (MPI) and OpenMP for multi-threading to accomplish the last word target of excessive functionality at low strength intake on enterprise-class workstations and compute clusters.

New PDF release: Numeric Computation and Statistical Data Analysis on the

Numerical computation, wisdom discovery and statistical facts research built-in with robust second and 3D snap shots for visualisation are the main themes of this e-book. The Python code examples powered through the Java platform can simply be reworked to different programming languages, reminiscent of Java, Groovy, Ruby and BeanShell.

Extra info for A Tiny Handbook of R

Sample text

Character values are compared alphabetically and case-sensitively: the alphabet is in increasing order, for example "ant" \ "bee", and upper-case is greater than lower-case so "Ant" [ "ant". Conditional operators are vectorized as follows. When two vectors are compared the shorter is recycled if necessary to make the vectors the same length, then the conditional operation is applied between pairs of corresponding cells. The result is a logical vector the same length as the longer argument. For example: [ x ¼ cð2; 4; 6; 8; 10Þ [ x [¼ 6 # 6 is recycled to match the length of x [ y ¼ cð"apple"; "apple"; "orange"; "apple"; "orange"Þ [ y ¼¼ "apple" Logical vectors can be combined using the operators28: & (AND), | (OR), and !

39 See also functions melt and cast in package reshape. 5 Reshaping 35 variables in a data frame that are to be stacked or unstacked. It handles unbalanced data by inserting NA as appropriate, and also treats time-invariant variables appropriately. names to specify the time-varying variable to be unstacked, and arguments idvar and timevar to specify the subject and time-point factors: [ dat ¼ reshapeðChickWeight; direction¼"wide"; v:names¼"weight"; þ idvar¼"Chick"; timevar¼"Time"Þ The result contains NA because the data are not balanced.

2 Tables of Cell Means and Other Summaries The tapply function maps a given function to groups of a vector split on one or more factors. If the vector is split on more than one factor, the factors must be passed as a single list argument. For example a table of cell means using the warpbreaks data: [ withðwarpbreaks; tapplyðbreaks; tension; meanÞÞ # one factor [ withðwarpbreaks; tapplyðbreaks; listðtension; woolÞ; meanÞÞ # two factors Any function can be applied, for example instead of mean use var for a table of cell variances.

Download PDF sample

A Tiny Handbook of R by Mike Allerhand (auth.)


by Kenneth
4.1

Rated 4.74 of 5 – based on 4 votes