Monthly Archives:May 2014

A quick look at FX realized vol

May 31,2014
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A quick look at FX realized vol

Much has been said 金宝搏网址about the decline in volatility.At the moment I am very active in FX spot trading and as a generalization do better the more vol there is. I wanted to see how things stood on the crosses I am most active in,即欧元/美元,GBP/USD and USD/JPY. I took hourly data from FxPro (not my broker,nor...

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RCPPGSL 0.2.1和0.2.2

May 31,2014
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A few days ago,OrrCPPGSL的版本------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

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Retrospective: Writing an O'Reilly Book

May 31,2014
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Retrospective: Writing an O'Reilly Book

A number of people have asked me 金宝搏网址about the amount of time and effort involved in writing a book as I just completed one for O'Reilly (published in April and is available on Amazon).The process at O'Reilly is unique in that a book is written and initially formatted on an application called Atlas.Ilya Grigorik also wrote...

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Cohort analysis with R – "layer-cake graph"

May 31,2014
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Cohort analysis with R – "layer-cake graph"

队列分析是市场营销人员评估客户保持率长期趋势和计算终身价值的最强大和最需要的技术之一。If you studied custora's university, you could be interested by amazing "layer-cake graph" they propose for Cohort analysis.库斯托拉说:“通过观察历法时间中的队列而产生的独特的“层饼图”可以…Read More »

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Mindoro数字高程图更新

5月30日,2014
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Mindoro数字高程图更新

Almost 2 years ago,I made a post on creating digital elevation map using R.For that post,I used the basic R plotting function to create the map.最近,我开始学习使用ggplot2包来可视化数据。今天,我创建了同样的地图…

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Tools for Online Teaching

5月30日,2014
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Last semester (Fall 2014),I organized and taught an interdisciplinary,collaborative class titled Probability for Scientists.Getting 4 separate teachers on the same page was a challenge,but asscientists we're used to communicating over email,and ...

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A new gitbook – learnR

5月30日,2014
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Gitbook is rather a relatively new concept on the web.它为作者提供了一个用户友好的框架来编写和制作具有漂亮插图和响应式交互的在线书籍。It allows authors to write in Markdown syntax,which is very easy to learn and use,so that they can focus more on the contents they try to produce than...

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Trimming the Fat from glm() Models in R

5月30日,2014
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Trimming the Fat from glm() Models in R

逻辑回归模型(通常是线性模型)的一个吸引人的方面是其紧凑性:模型的大小随着系数的增加而增加,not in the size of the training data.With R,though,glm models are not so concise;we noticed this to our dismay when we tried to Related posts:Generalized linear models...

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Modeling data with functional programming in R – Vector mechanics

5月30日,2014
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Modeling data with functional programming in R – Vector mechanics

I'm pleased to announce the completion of the second chapter of my book,用R语言中的函数编程对数据进行建模。…Continue reading →

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hipsteR: Learn what you missed in R as an early adopter

5月30日,2014
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如果你在早期就学会了R(比如,the early 2000's or even the late 1990's) you may still be using some — ahem — old-fashioned ways to accomplish some tasks better served by newer functions and packages.To help those of us who have may missed some of R's more recent innovations,卡尔·布罗曼创造了hipster,A…

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