发布于 2017-10-23 11:33:20 | 86 次阅读 | 评论: 0 | 来源: 网友投递

这里有新鲜出炉的R语言教程,程序狗速度看过来!

R 数据统计分析语言

R是用于统计分析、绘图的语言和操作环境。R是属于GNU系统的一个自由、免费、源代码开放的软件,它是一个用于统计计算和统计制图的优秀工具。


R语言是主要用于统计分析、绘图的语言和操作环境。R本来是由来自新西兰奥克兰大学的Ross Ihaka和Robert Gentleman 开发(也因此称为R),现在由“R开发核心团队”负责。

20170928发布最新版3.4.2 昵称Short Summer (短暂的夏天) 。

NEW FEATURES

  • Setting the LC_ALL category in Sys.setlocale() invalidates any cached locale-specific day/month names and the AM/PM indicator for strptime() (as setting LC_TIME has since R 3.1.0).

  • The version of LAPACK included in the sources has been updated to 3.7.1, a bug-fix release.

  • The default for tools::write_PACKAGES(rds_compress=) has been changed to "xz" to match the compression used by CRAN.

  • c() and unlist() are now more efficient in constructing the names(.) of their return value, thanks to a proposal by Suharto Anggono. (PR#17284)

UTILITIES

  • R CMD check checks for and R CMD build corrects CRLF line endings in shell scripts configure and cleanup (even on Windows).

INSTALLATION on a UNIX-ALIKE

  • The order of selection of OpenMP flags has been changed: Oracle Developer Studio 12.5 accepts -fopenmp and -xopenmp but only the latter enables OpenMP so it is now tried first.

BUG FIXES

  • within(List, rm(x1, x2)) works correctly again, including when List[["x2"]] is NULL.

  • regexec(pattern, text, *) now applies as.character(.) to its first two arguments, as documented.

  • write.table() and related functions, writeLines(), and perhaps other functions writing text to connections did not signal errors when the writes failed, e.g. due to a disk being full. Errors will now be signalled if detected during the write, warnings if detected when the connection is closed. (PR#17243)

  • rt() assumed the ncp parameter was a scalar. (PR#17306)

  • menu(choices) with more than 10 choices which easily fit into one getOption("width")-line no longer erroneously repeats choices. (PR#17312)

  • length()<- on a pairlist succeeds. (https://stat.ethz.ch/pipermail/r-devel/2017-July/074680.html)

  • Language objects such as quote(("n")) or R functions are correctly printed again, where R 3.4.1 accidentally duplicated the backslashes.

  • Construction of names() for very large objects in c() and unlist() now works, thanks to Suharto Anggono's patch proposals in PR#17292.

  • Resource leaks (and similar) reported by Steve Grubb fixed. (PR#17314PR#17316PR#17317PR#17318PR#17319PR#17320)

  • model.matrix(~1, mf) now gets the row names from mf also when they differ from 1:nrow(mf), fixing PR#14992 thanks to the suggestion by Sebastian Meyer.

  • sigma(fm) now takes the correct denominator degrees of freedom for a fitted model with NA coefficients. (PR#17313)

  • hist(x, "FD") no longer “dies” with a somewhat cryptic error message when x has extreme outliers or IQR() zero: nclass.FD(x) tries harder to find a robust bin width h in the latter case, andhist.default(*, breaks) now checks and corrects a too large breaks number. (PR#17274)

  • callNextMethod() works for ... methods.

  • qr.coef(qd, y) now has correct names also when qd is a complex QR or stems from qr(*, LAPACK=TRUE).

  • Setting options(device = *) to an invalid function no longer segfaults when plotting is initiated. (PR#15883)

  • encodeString(<very large string>) no longer segfaults. (PR#15885)

  • It is again possible to use configure --enable-maintainer-mode without having installed notangle (it was required in R 3.4.[01]).

  • S4 method dispatch on ... calls the method by name instead of .Method (for consistency with default dispatch), and only attempts to pass non-missing arguments from the generic.

  • readRDS(textConnection(.)) works again. (PR#17325)

  • (1:n)[-n] no longer segfaults for n <- 2.2e9 (on a platform with enough RAM).

  • x <- 1:2; tapply(x, list(x, x), function(x) "")[1,2] now correctly returns NA. (PR#17333)

  • Running of finalizers after explicit GC request moved from the R interface do_gc to the C interface R_gc. This helps with reclaiming inaccessible connections.

  • help.search(topic) and ??topic matching topics in vignettes with multiple file name extensions (e.g., ‘*.md.rsp’ but not ‘*.Rmd’) failed with an error when using options(help_type = "html").

  • The X11 device no longer uses the Xlib backing store (PR#16497).

  • array(character(), 1) now gives (a 1D array with) NA as has been documented for a long time as in the other cases of zero-length array initialization and also compatibly with matrix(character(), *). As mentioned there, this also fixes PR#17333.

  • splineDesign(.., derivs = 4) no longer segfaults.

  • fisher.test(*, hybrid=TRUE) now (again) will use the hybrid method when Cochran's conditions are met, fixing PR#16654.



历史版本 :
R 语言更新到 3.4.2 版本,昵称 Short Summer
R 3.3.2 更新发布,CMS 建站系统
MoKee OpenSource 51.1 2015-10-01 正式版发布!
Go 1.5 RC1 发布,8 月 20 日发布最终版!
R 3.1.2 发布,数据统计分析语言
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