1712 search results for "Excel"

Displaying spatial sensor data from Arduino with R on Google Maps

February 26, 2014
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Displaying spatial sensor data from Arduino with R on Google Maps

For Christmas I decided to treat myself with an Arduino starter kit. I started doing some basic experiments and I quickly found out numerous website that sell every sort of sensor: from temperature and humidity, to air quality. Long story short, I bou...

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Job Trends in the Analytics Market: New, Improved, now Fortified with C, Java, MATLAB, Python, Julia and Many More!

February 24, 2014
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Job Trends in the Analytics Market: New, Improved, now Fortified with C, Java, MATLAB, Python, Julia and Many More!

I’m expanding the coverage of my article, The Popularity of Data Analysis Software. This is the first installment, which includes a new opening and a greatly expanded analysis of the analytics job market. Here it is, from the abstract onward … Continue reading →

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Brief introduction on Sweave and Knitr for reproducible research

February 24, 2014
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Brief introduction on Sweave and Knitr for reproducible research

A few weeks ago I gave a presentation on using Sweave and Knitr under the guise of promoting reproducible research. I humbly offer this presentation to the blog with full knowledge that there are already loads of tutorials available online. This presentation is specific and slightly biased towards Windows OS, so it probably has limited

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Programmatically download political science data with the psData package

February 23, 2014
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A lot of progress has been made on improving political scientists’ ability to access data ‘programmatically’, e.g. data can be downloaded with source code R. Packages such as WDI for World Bank Development Indicator and dvn for many data sets stored on the Dataverse Network make it much easier for political scientists to use this data...

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Pimping your forest plot

February 23, 2014
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Pimping your forest plot

In order to celebrate my Gmisc-package being on CRAN I decided to pimp up the forestplot2 function. I had a post on this subject and one of the suggestions I got from the comments was the ability to change the default box marker to something else. This idea had been in my mind for a while and I therefore...

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Character strings in R

February 19, 2014
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Character strings in R

This post deals with the basics of character strings in R. My main reference has been Gaston Sanchez‘s ebook , which is excellent and you should read it if interested in manipulating text in R. I got the encoding’s section from , which is also a nice reference to have nearby. Text analysis will be

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R and (Software) Relatives

February 18, 2014
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R and (Software) Relatives

Post also available with code executed inline at rpubs.com. O'Reilly recently published the results of a survey from attendees of the Strata Conference related to tool usage and salary.  The entire survey is available for download.  In the survey results, R was heralded as second only to SQL as a tool used by conference attendees.  An chart from the...

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Development of a R code to solve a large system of equations with linear constrains

February 18, 2014
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Our project team is aimed at providing data analysis to the rest of the company to make data-driven decisions. We faced a problem when we discovered that the Excel solver was not able to solve some “large” problem. So we switched to R and our first tests are quite encouraging. Now we need some support The post

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Probabilistic Momentum

February 16, 2014
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Probabilistic Momentum

David Varadi has recently discussed an interesting strategy in the Are Simple Momentum Strategies Too Dumb? Introducing Probabilistic Momentum post. David also provided the Probabilistic Momentum Spreadsheet if you are interested in doing computations in Excel. Today I want to show how you can test such strategy using the Systematic Investor Toolbox: The Simple Momentum

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Reproducible research, training wheels, and knitr

February 15, 2014
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Reproducible research, training wheels, and knitr

Last week I gave a short talk at CMU’s statistical computing seminar, Stat Bytes. I summarized why reproducible research (RR) and literate programming are worthwhile, not just for serious research but also for homework reports or statistical blog posts. I … Continue reading →

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