Monthly Archives:May 2013

Rmagic一个方便的连接python和r的接口

May 31,2013
通过
Rmagic一个方便的连接python和r的接口

Rmagic (http://ipython.org/ipython-doc/dev/config/extensions/rmagic.html) is the ipython extension that utilizes rpy2 in the back-end and provides a convenient interface accessing R from ipython.Compared with the generic use of rpy2,the rmagic extension allows users to exchange objects between ipython and R in a more flexible way and to run a single R function or a block

Read more »

How logistic regression work ?

May 31,2013
通过
How logistic regression work ?

Discussing with a non statistician colleague,逻辑回归似乎不直观;一些基本问题,比如:-为什么不使用线性模型?-物流功能是什么?-我们如何手工计算,一步一步t…

Read more »

Generating Nice Looking Tree Diagrams in R

May 31,2013
通过
Generating Nice Looking Tree Diagrams in R

This function generates nice looking tree diagrams (see sample) below from tree objects (generated by package tree).This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation,either version 3 of the License,或(由您选择)

Read more »

Using the rasterVis package for raster plotting (in R)

May 31,2013
通过
Using the rasterVis package for raster plotting (in R)

下面是一篇讨论Rastervis软件包可能性的文章:http://rpubs.com/lionel/6374,归档位置:r,stat taged:r,光栅

Read more »

降雪

May 31,2013
通过
降雪

Yesterday I had a short post reminding EViews users that their package (versions 7 or 8) will access all of the cores on a multi-core machine.在过去的几天里,我一直在我的台式机上玩R中的并行处理。It's something I've been meaning to do for a while,事实证明…

Read more »

The arteries of the world,在推特中

May 31,2013
通过
The arteries of the world,在推特中

What happens when you plot billions of geotagged Tweets on a map?你可以看到世界的动脉。这是欧洲:根据创造者米盖尔·里奥斯(工程经理,Data Visualization at Twitter),图表上的圆点代表了自2009年以来的每一条带地理标签的微博。颜色表示该地区的tweet数量,and the intensity shows where people...

Read more »

Are parallel computations worth it ?

May 31,2013
通过
Are parallel computations worth it ?

Yesterday,丹尼尔·马塞利诺在他的博客上发表了一篇有趣的文章,untitled Parallel Processing: When does it worth?对于我目前正在写的一章,我也在问自己同样的问题。我很喜欢他的方法,so I tried,on my computer to do the same.I did use three packages to run parallel R codes,……

Read more »

Visualizing a One-Way ANOVA using D3.js

May 31,2013
通过

A while ago I was playing around with the JavaScript package D3.js,and I began with this visualization—that I never really finished—of howa one-way ANOVA is calculated.I wanted to make the visualizationinteractive,我整合了一些互动元素。例如,if you hover over a data point it will show the residual,andits value will be highlighted in the...

Read more »

Regression regularization example

May 31,2013
通过
Regression regularization example

Recently I needed a simple example showing when application of regularization in regression is worthwhile.Here is the code I came up with (along with basic application of parallelization of code execution).Assume you have 60 observations and 50 expla...

Read more »

accurate ABC: comments by Oliver Ratman [guest post]

May 31,2013
通过
accurate ABC: comments by Oliver Ratman [guest post]

Here are comments by Olli following my post: I think we found a general means to obtain accurate ABC in the sense of matching the posterior mean or MAP exactly,and then minimising the KL distance between the true posterior and its ABC approximation subject to this condition.建筑工程的辅助概率

Read more »

Search 188bet appR-bloggers


赞助商

Never miss an update!
Subscribe to 188bet appR-bloggersto receive
e-mails with the latest R posts.
(您将不再看到此消息。)

Click here to close (This popup will not appear again)