1243 search results for "excel"

Copying Data from Excel to R and Back

February 24, 2013
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Copying Data from Excel to R and Back

A lot of times we are given a data set in Excel format and we want to run a quick analysis using R's functionality to look at advanced statistics or make better visualizations. There are packages for importing/exporting data from/to Excel, but I have f...

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Copying Data from Excel to R and Back

February 23, 2013
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Copying Data from Excel to R and Back

A lot of times we are given a data set in Excel format and we want to run a quick analysis using R's functionality to look at advanced statistics or make better visualizations. There are packages for importing/exporting data from/to Excel, but I have found them to be hard to work with or only work with old versions of...

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Some of Excel’s Finance Functions in R

February 16, 2013
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Last year I took a free online class on finance by Gautam Kaul. I recommend it, although there are other classes I can not compare it to. The instructor took great efforts in motivating the concepts, structuring the material, and enable critical thinking / intuition. I believe this is an advantage of video...

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Did an Excel error bring down the London Whale?

February 11, 2013
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When JP Morgan Chase announced it had lost more than 2 billion dollars on the capital markets back in May 2012, many pointed to the actions of rogue trader Bruno Iksil as the cause. But was the "London Whale" — the nickname he was given by other traders for his outsized positions — the victim not of hubris, but...

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Management of Research Data – a Shell+Python+Excel+R Approach

January 23, 2013
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Management of Research Data – a Shell+Python+Excel+R Approach

I am a computer science researcher, usually working on both Windows and Linux system. Windows is the place where I do the document work, like reading paper, browsing the internet, writing papers with LaTex… Linux is where I run and generate experimental results. The Chaos After years of messy data management and recent data chaos,

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Please stop using Excel-like formats to exchange data

December 7, 2012
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Please stop using Excel-like formats to exchange data

I know “officially” data scientists all always work in “big data” environments with data in a remote database, streaming store or key-value system. But in day to day work Excel files and Excel export files get used a lot and cause a disproportionate amount of pain. I would like to make a plea to my Related posts:

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Excel + Cytoscape + R = ExCytR

November 16, 2012
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Excel + Cytoscape + R = ExCytR

My new project is coming along nicely and should be released early 2013. It builds on the structures developed in imDEV to link Excel, Cytoscape and R using RExcel,  RCytoscape, and CytoscapeRPC . This trio can be used to rapidly generate beautiful and  informative network representations of data. Here is an example of a  undirected Gaussian graphical

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Calling Minimum Correlation Algorithm from Excel using RExcel & VBA

September 26, 2012
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Calling Minimum Correlation Algorithm from Excel using RExcel & VBA

I want to show the example of calling the Minimum Correlation Algorithm from Excel. I will use RExcel to connect R and Excel and will create a small VBA cell array function to communicate between Excel and R. I have previously discussed the concept of connecting R and Excel in the “Calling Systematic Investor Toolbox

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Importing data directly from MS Excel

August 10, 2012
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Importing data directly from MS Excel

R is great for exploring, analysing and graphing your valuable data. No question about it. Unfortunately though, there’s no base package support for importing data directly from MS Excel. This means that you have to faff about saving it in another format, and THEN import this new file. This just adds another file to your

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Data Mining In Excel: Lecture Notes and Cases

July 10, 2012
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Data Mining In Excel: Lecture Notes and Cases

by Yanchang Zhao, RDataMining.com It is a 270-page book on data mining with Excel. It can be downloaded as a PDF file at http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.83.1393&rep=rep1&type=pdf. Below is its table of contents. - Overview of the Data Mining Process - Data Exploration … Continue reading →

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