R数据分析 – Check This Out..

R is a language and environment for statistical computing and graphics. It is a GNU project which is comparable to the S language and environment which was developed at Bell Laboratories (formerly AT&T, now Lucent Technologies) by John Chambers and colleagues. R can be looked at as being a different implementation of S. There are a few important differences, but much code written for S runs unaltered under R.

R provides a multitude of statistical (linear and nonlinear modelling, classical statistical tests, time-series analysis, classification, clustering, …) and graphical techniques, and it is highly extensible. The S language is truly the vehicle of choice for research in statistical methodology, and R provides an Open Source route to participation in this activity.

Certainly one of R’s strengths is the ease with which well-designed publication-quality plots can be produced, including mathematical symbols and formulae where needed. Great care has become bought out the defaults for that minor design choices in R代写, however the user retains full control.

R is available as Free Software beneath the relation to the Free Software Foundation’s GNU General Public License in source code form. It compiles and runs on a multitude of UNIX platforms and other systems (including FreeBSD and Linux), Windows and MacOS.

The R environment – R is an integrated suite of software facilities for data manipulation, calculation and graphical display. It includes

* an effective data handling and storage facility,

* a suite of operators for calculations on arrays, specifically matrices,

* a big, coherent, integrated collection of intermediate tools for data analysis,

* graphical facilities for data analysis and display either on-screen or on hardcopy, and

* a well-developed, easy and effective programming language including conditionals, loops, user-defined recursive functions and input and output facilities.

The phrase “environment” is intended to characterize it as a a completely planned and coherent system, rather than an incremental accretion of very specific and inflexible tools, as is frequently the case with some other data analysis software.

R, like S, is designed around a genuine computer language, and it also allows users to incorporate additional functionality by defining new functions. Most of the system is itself written in the R dialect of S, that makes it easier for users to follow along with the algorithmic choices made. For computationally-intensive tasks, C, C and Fortran code can be linked and called at run time. Advanced users can write C code to manipulate R objects directly.

Many users think about R as being a statistics system. We choose to consider it an environment within which statistical techniques are implemented. R can be extended (easily) via packages. There are about eight packages supplied with the R distribution and many others can be found through the CRAN group of Web sites covering a very wide range of modern statistics. R has its own LaTeX-like documentation format, which is used to supply comprehensive documentation, both on-line in a number of formats and then in hardcopy.

In the event you choose R? Data scientist can use two excellent tools: R and Python. You may not have time and energy to learn both of them, specifically if you get going to learn data science. Learning statistical modeling and algorithm is much more important rather than become familiar with a programming language. A programming language is actually a tool to compute and communicate your discovery. The most crucial task in rhibij science is the way you cope with the information: import, clean, prep, feature engineering, feature selection. This needs to be your primary focus. Should you be learning R and Python concurrently without a solid background in statistics, its plain stupid. Data scientist are not programmers. Their job would be to understand the data, manipulate it and expose the very best approach. In case you are thinking about which language to find out, let’s see which language is regarded as the suitable for you.

The main audience for data science is business professional. In the business, one big implication is communication. There are lots of methods to communicate: report, web app, dashboard. You need a tool that does all of this together.

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