Changes between Version 9 and Version 10 of wade/R
- Timestamp:
- Apr 16, 2008, 6:06:56 PM (17 years ago)
Legend:
- Unmodified
- Added
- Removed
- Modified
-
wade/R
v9 v10 29 29 * 一個發展良好,簡單且有效的程式語言,其包含條件判斷、迴圈、使用者自訂的遞迴式子及輸入輸出的工具。 30 30 31 The term "environment" is intended to characterize it as a fully planned and coherent system, rather than an incremental accretion of very specific and inflexible tools, as is frequently the case with other data analysis software.[[BR]] 31 32 32 33 34 R, like S, is designed around a true computer language, and it allows users to add additional functionality by defining new functions. Much of the system is itself written in the R dialect of S, which makes it easy for users to follow 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.[[BR]] 35 36 Many users think of R as a statistics system. We prefer to think of it of 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 more are available through the CRAN family of Internet sites covering a very wide range of modern statistics.[[BR]] 37 38 R has its own LaTeX-like documentation format, which is used to supply comprehensive documentation, both on-line in a number of formats and in hardcopy.[[BR]] 39