1529 search results for "how to import image file to R"

Don’t give up on single trees yet…. An interactive tree with Microsoft R

December 10, 2016
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Don’t give up on single trees yet…. An interactive tree with Microsoft R

Introduction A few days ago Microsoft announced their new Microsoft R Server 9.0 version. Among a lot of new things, it includes some new and improved machine learning algorithms in their MicrosoftML package. Fast linear learner, with support for L1 … Continue reading →

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Replicating CRSP Volatility Decile Portfolios in R

December 7, 2016
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Replicating CRSP Volatility Decile Portfolios in R

  Introduction In this post, I provide R code that enables the replication of the Center for Research in Security Prices (CRSP) Volatiliy Deciles using Yahoo! Finance data. This post is related to my last blog post in that it will generate the CRSP low volatility decile portfolio, thereby facilitating the replication of the associated … Continue...

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Reddit Responds to the Election

December 5, 2016
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Reddit Responds to the Election

It’s been about a month since the U.S. presidential election, with Donald Trump’s victory over Hillary Clinton coming as a surprise to most. Reddit user Jason Baumgartner collected and published every submission and comment posted to Reddit on the ...

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Crime Analysis – Denver-Part 3

December 5, 2016
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Crime Analysis – Denver-Part 3

Marijuana, Alcohol, and Other Drugs Continuing our Exploration of the Data After identifying the sources of crime growth, it’s time to investigate specific crime rates. This blog post addresses drug and alcohol crimes in Denver over the past few years. This is a very simplistic view because it will only focus on trend data, which

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Crime Analysis – Denver-Part 3

December 4, 2016
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Crime Analysis – Denver-Part 3

A look into Denver crime data surrounding marijuana, alcohol, and other drugs using R programming.

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Forecast double seasonal time series with multiple linear regression in R

December 2, 2016
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Forecast double seasonal time series with multiple linear regression in R

I will continue in describing forecast methods, which are suitable to seasonal (or multi-seasonal) time series. In the previous post smart meter data of electricity consumption were introduced and a forecast method using similar day approach was proposed. ARIMA and exponential smoothing (common methods of time series analysis) were used as forecast methods. The biggest disadvantage of this...

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Comparing a MySQL Query with a Data Table in R

December 2, 2016
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Comparing a MySQL Query with a Data Table in R

  Data tables are becoming an increasingly popular way of working with data sets in R. The syntax can become rather complex, but the framework is much faster and more flexible than other methods. The basic structure of a data table, though, if fairly intuitive–as it corresponds quite nicely with SQL queries in relational database

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Extracting Tables from PDFs in R using the Tabulizer Package

December 1, 2016
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Extracting Tables from PDFs in R using the Tabulizer Package

Recently I wanted to extract a table from a pdf file so that I could work with the table in R. Specifically, I wanted to get data on layoffs in California from the California Employment Development Department. The EDD publishes a list of all of the layoffs in the state that fall under the WARN Related Post

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Efficiently Saving and Sharing Data in R

December 1, 2016
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Efficiently Saving and Sharing Data in R

After spending a day the other week struggling to make sense of a federal data set shared in an archaic format (ASCII fixed format dat file). It is essential for the effective distribution and sharing of data that it use the minimum amount of disk space and be rapidly accessible for use by potential users. In this post I...

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How to send bulk email to your students using R

December 1, 2016
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How to send bulk email to your students using R

In this post I write about a technique I use to send personalized bulk emails to my students at the open and distance education university where I teach (the Universidad Nacional Abierta in Venezuela, or UNA, for short). Being able to mass-email students with personalized messages is should be an important issue in any distance education setup. However, as...

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