925 search results for "sql"

rPithon vs. rPython

March 30, 2015
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rPithon vs. rPython

Similar to rPython, the rPithon package (http://rpithon.r-forge.r-project.org) allows users to execute Python code from R and exchange the data between Python and R. However, the underlying mechanisms between these two packages are fundamentally different. Wihle rPithon communicates with Python from R through pipes, rPython accomplishes the same task with json. A major advantage of rPithon

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rPithon vs. rPython

March 30, 2015
By
rPithon vs. rPython

Similar to rPython, the rPithon package (http://rpithon.r-forge.r-project.org) allows users to execute Python code from R and exchange the data between Python and R. However, the underlying mechanisms between these two packages are fundamentally different. Wihle rPithon communicates with Python from R through pipes, rPython accomplishes the same task with json. A major advantage of rPithon

Read more »

Makefiles and RMarkdown

March 28, 2015
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Makefiles and RMarkdown

Quite some time ago (October 2013, according to Amazon), I bought a copy of “Reproducible Research with R and RStudio” by Christopher Gandrud. And it was awesome. Since then, I’ve been using knitr and RMarkdown quite a lot. However, until recently, I never bothered with a makefile. At the time, I had assumed that it

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The World We Live In #4: Marriage Ages

March 16, 2015
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The World We Live In #4: Marriage Ages

It is time for women to stop being politely angry (Leymah Gbowee, Nobel Prize Peace Winner) Sometimes very simple plots give insight into we live in a world of differences. This plot shows the mean age at marriage for men and women across countries: Being a woman in some countries of this world must be a … Continue reading...

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Dealing with a Byte Order Mark (BOM)

March 11, 2015
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Dealing with a Byte Order Mark (BOM)

I have just been trying to import some data into R. The data were exported from a SQL Server client in tab-separated value (TSV) format. However, reading the data into R the "usual" way produced unexpected results: Those weird characters in the first record... where did they come from? They don't show up in a The post

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Import Japanese equity data into R with quantmod 0.4-4

March 10, 2015
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I pushed quantmod 0.4-4 to CRAN this weekend.  It adds a getSymbols.yahooj function to pull stock data from Yahoo Finance Japan, and fixes issues in getOptionChain.yahoo and getSymbols.oanda.Changes to the Yahoo Finance and Oanda websites broke the getOptionChain.yahoo and getSymbols.oanda functions, respectively.  I didn’t use getOptionChain.yahoo much, so I’m not certain I restored all the prior...

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How to Use R for Connecting Neo4j and Tableau (A Recommendation Use Case)

March 6, 2015
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How to Use R for Connecting Neo4j and Tableau (A Recommendation Use Case)

Introduction Year is just a little bit more than two months old and we got the good news from Tableau - beta testing for version 9.0 started. But it looks like that one of my most favored features didn’t manage...

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R Basics at Simple Talk

March 5, 2015
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R Basics at Simple Talk

News that Microsoft will acquire Revolution Analytics has raised interest about R among SQL Server and .NET developers and administrators.  Simple-Talk is an online technical journal and hub for a community of such users.  I just wrote a...

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Very gentle resource for speeding up R code

March 5, 2015
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Very gentle resource for speeding up R code

Nathan Uyttendaele has written a great beginner’s guide to speeding up your R code. Abstract: Most calculations performed by the average R user are unremarkable in the sense that nowadays, any computer can crush the related code in a matter … Continue reading →

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Playing around with #rstats twitter data

Playing around with #rstats twitter data

As a bit of weekend fun, I decided to briefly look into the #rstats twitter data that Stephen Turner collected and made available (thanks!). Essentially, this data set contains some basic information about over 100,000 tweets that contain the hashtag… Continue reading →

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