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R语言 机器学习包

由 孤人 提交于 2019-12-10 01:44:38
from: http://www.zhizhihu.com/html/y2009/410.html 机器学习是计算机科学和统计学的边缘交叉领域，R关于机器学习的包主要包括以下几个方面： 1）神经网络（Neural Networks）： nnet包执行单隐层前馈神经网络，nnet是VR包的一部分（ http://cran.r-project.org/web/packages/VR/index.html ）。 2）递归拆分（Recursive Partitioning）： 递归拆分利用树形结构模型，来做回归、分类和生存分析，主要在rpart包（ http://cran.r-project.org/web/packages/rpart/index.html ）和tree包（ http://cran.r-project.org/web/packages/tree/index.html ）里执行，尤其推荐rpart包。Weka里也有这样的递归拆分法，如：J4.8, C4.5, M5，包Rweka提供了R与Weka的函数的接口（ http://cran.r-project.org/web/packages/RWeka/index.html ）。 party包提供两类递归拆分算法，能做到无偏的变量选择和停止标准：函数ctree()用非参条件推断法检测自变量和因变量的关系；而函数mob(

R install Vennerable package on windows [duplicate]

由 烈酒焚心 提交于 2019-12-10 00:30:43
问题 This question already has answers here : Cannot install R-forge package using install.packages (4 answers) Closed 4 years ago . I am not able to install the Vennerable R package from https://r-forge.r-project.org/projects/vennerable/ on my Windows 7 with newest R (2.13.0). I tried following: installed from RGui and selecting R-Forge repos: there was no Vennerable package in the list installed from RGui using "install package from local zip file": can not open compressed file 'Vennerable.tar

meteor 0.9 “list” shows “new versions of these packages are available” but “update” doesn't

由 我怕爱的太早我们不能终老 提交于 2019-12-09 23:50:28
问题 $ meteor list ... * New versions of these packages are available! Run 'meteor update' to update. $ meteor update Figuring out the best package versions to use. This may take a moment. This project is at the latest release which is compatible with your current package constraints. See the simplified version below: It seems like there's a "conflict" between the list command which is saying there are updates available, and the update command which can not find any... how can this happen? 回答1:

Unit finalization order for application, compiled with run-time packages?

由 青春壹個敷衍的年華 提交于 2019-12-09 18:05:51
问题 I need to execute my code after finalization of SysUtils unit. I've placed my code in separate unit and included it first in uses clause of dpr-file, like this: project Project1; uses MyUnit, // <- my separate unit SysUtils, Classes, SomeOtherUnits; procedure Test; begin // end; begin SetProc(Test); end. MyUnit looks like this: unit MyUnit; interface procedure SetProc(AProc: TProcedure); implementation var Test: TProcedure; procedure SetProc(AProc: TProcedure); begin Test := AProc; end;

Version errors for numpy when importing matplotlib

由 拜拜、爱过 提交于 2019-12-09 17:16:18
问题 When I import matplotlib I get no errors, but when I import matplotlib.pyplot I get RuntimeError: module compiled against API version 8 but this version of numpy is 7 Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/Library/Python/2.7/site-packages/matplotlib/pyplot.py", line 24, in <module> import matplotlib.colorbar File "/Library/Python/2.7/site-packages/matplotlib/colorbar.py", line 27, in <module> import matplotlib.artist as martist File "/Library/Python/2.7

How do I move Delphi XE packages and settings to another user?

由 北慕城南 提交于 2019-12-09 16:37:39
问题 We have set up a new (template) development machine with among other things Delphi XE including a large number of third-party and internal packages, and intend to make a number of clones of this computer for the developers in our team. Note that we are not trying to bypass licensing, we (re-) activate/register Windows, Office, Delphi XE etc. after cloning. My problem is that when I am logged on (as myself) to the clone that will be my own machine, Delphi shows none of the packages we

Java Namespace - Two classes with the same name in different packages

由 ⅰ亾dé卋堺 提交于 2019-12-08 17:42:00
问题 I am coming from Objective-C where we don't have packages and namespacing. Android has android.text.format.DateFormat which has static methods that return java.text.DateFormat instances ( getLongDateFormat() and getMediumDateFormat() specifically). Are these methods referred to as "static methods" or "class methods" or both interchangeably? Looking at Android documentation, how am I suppose to know that the android.text.format.DateFormat methods return a java.text.DateFormat instance and not

Can two different apps have the same packageName?

由 荒凉一梦 提交于 2019-12-08 16:55:20
问题 I have this code to get a list of all apps on system: PackageManager pm = getPackageManager(); Intent mainIntent = new Intent(Intent.ACTION_MAIN); List<ResolveInfo> installedApps = pm.queryIntentActivities( mainIntent, 0); for(ResolveInfo elem : installedApps) { String PackageName = elem.activityInfo.applicationInfo.packageName; Log.i("TAG",PackageName); } But the result in installedApps shows many repeated PackageNames. Is this possible? It's 'cause a "failure" of the intent or because many

PLS-00123: program too large (Diana nodes) while trying to compile a package

由 故事扮演 提交于 2019-12-08 15:31:54
问题 While compiling a package, I ran into an error message: Error: PLS-00123: program too large (Diana nodes) Line: 1 The package in question has about 1k lines (spec) + 13k lines in body. While researching on this, I came across this Ask Tom question When compiling a PL/SQL unit, the compiler builds a parse tree. The maximum size of a PL/SQL unit is determined by the size of the parse tree. A maximum number of diana nodes exists in this tree. Up to 7.3, you could have 2**14 (16K) diana nodes,

Error installing R package for Linux

由 自古美人都是妖i 提交于 2019-12-08 14:30:12
问题 Im trying to install a package named "rgeos" on R 3.3, but when I type install.packages("rgeos") But it returns me the following error (same happens with other packages, but not all the packages): > * installing *source* package ‘rgeos’ ... ** package ‘rgeos’ successfully unpacked and MD5 sums checked configure: CC: gcc configure: CXX: g++ configure: rgeos: 0.3-19 checking for /usr/bin/svnversion... no configure: svn revision: 524 checking for geos-config... no no configure: error: geos
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