1107 search results for "tutorial"

Running OpenBUGS on a Mac Running OSX

March 20, 2012
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After writing up my tutorial regarding getting WinBUGS running on a Mac in R, a friend sent me this fantastic simple tutorial on the same thing for OpenBUGS on a mac in R. So, for those that want it, install away! Looks a good bit simpler, actually! Tweet

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Backtesting Asset Allocation portfolios

March 18, 2012
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Backtesting Asset Allocation portfolios

In the last post, Portfolio Optimization: Specify constraints with GNU MathProg language, Paolo and MC raised a question: “How would you construct an equal risk contribution portfolio?” Unfortunately, this problem cannot be expressed as a Linear or Quadratic Programming problem. The outline for this post: I will show how Equal Risk Contribution portfolio can be

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Portfolio Optimization: Specify constraints with GNU MathProg language

March 14, 2012
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Portfolio Optimization: Specify constraints with GNU MathProg language

I have previously described a few examples of portfolio construction: Introduction to Asset Allocation Maximum Loss and Mean-Absolute Deviation risk measures 130/30 Portfolio Construction Minimum Investment and Number of Assets Portfolio Cardinality Constraints Multiple Factor Model – Building 130/30 Index (Update) I created a number of helper functions to simplify process of making the constraints(

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In case you missed it: February Roundup

March 13, 2012
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In case you missed them, here are some articles from February of particular interest to R users. February 29 marked the 12th anniversary of the release of R 1.0.0, and the release of R 2.14.2. A list of commercial vendors who have integrated R with their products for data, analysis, and presentation. The rmr package (part of the RHadoop...

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NIT: Fatty acids study in R – Part 006

March 12, 2012
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NIT: Fatty acids study in R – Part 006

In one of the columns, for constituent C16_0, one sample (57) has a value of “zero” (we could see this in the histogram).The reason for that is that the laboratory did not supply this value. The PLS regression will consider the lab value as cero, s...

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github with Multiple Accounts: An Analyst Perspective

March 10, 2012
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After using github for data mining competitions and a project on statistical language models I found I enjoyed it some much I wanted to use it at work too. The trick is there’s a lot of overlap between what I...

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NIT: Fatty acids study in R – Part 004

March 7, 2012
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NIT: Fatty acids study in R – Part 004

It is clear that MSC does not remove the entire scatter in the raw spectra, so some of the information is hidden by the scatter. Improvement of the sample presentation will help to remove the scatter.We know that the first loading is much related to th...

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How to Import SPSS Data into R

March 7, 2012
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This video tutorial demonstrates how to import data into R that is currently in SPSS format. The video also shows how to do use a few basic commands on datasets, once they are imported into R. The steps in this video apply whether you are using a Mac or a PC/Windows machine. See more videos on www.statsmakemecry.com.

How to Import SPSS Data into R

March 7, 2012
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This video tutorial demonstrates how to import data into R that is currently in SPSS format. The video also shows how to do use a few basic commands on datasets, once they are imported into R. The steps in this video apply whether you are using a Mac o...

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Philadelphia Schools

March 7, 2012
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Philadelphia Schools

I'm on spring break, and yesterday I took some time to check off some items on my to-do list, namely:Start getting acquainted with all the new features of ggplot2 .Get a handle on dealing with geographic data in R.I've done some furtive geographic...

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