2636 search results for "time series"

Dates and Times – Simple and Easy with lubridate exercises (part 2)

August 29, 2016
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Dates and Times – Simple and Easy with lubridate exercises (part 2)

This is the second part in the series teaching the “lubridate” package. As a short recap from the previous part, I mentioned that date/date_time formats are easily parced using the ymd set of functions (for example, dmy, ymd_h, etc). I also explained that arithmetic calculations are performed using the days, months, years, etc. functions. In

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Dates and Times – Simple and Easy with lubridate exercises (part 1)

August 15, 2016
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Dates and Times – Simple and Easy with lubridate exercises (part 1)

As in any programming language, handling date and time variables can be quite frustrating, since, for example, there is no one single format for dates, there are different time zones and there are issues such as daylight saving time. Base R provides several packages for handling date and time variables, but they require mastering cumbersome

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Time Averages of NetCDF files from ECMWF in ArcGIS with R-Bridge

July 8, 2016
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Time Averages of NetCDF files from ECMWF in ArcGIS with R-Bridge

With this post I would like to talk again about R-Bridge, which allows a direct communication between ArcGIS and R.In the previous post, I presented a very simple application of R-Bridge where I built a toolbox to perform k-means clustering on point sh...

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Making “Time Rivers” in R

June 28, 2016
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Making “Time Rivers” in R

Once again, @albertocairo notices an interesting chart and spurs pondering in the visualization community with his post covering an unusual “vertical time series” chart produced for the print version of the NYTimes: I’m actually less concerned about the vertical time series chart component here since I agree with TAVE* Cairo that folks are smart enough... Continue reading →

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Why you should read Nina Zumel’s 3 part series on principal components analysis and regression

June 9, 2016
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Why you should read Nina Zumel’s 3 part series on principal components analysis and regression

Short form: Win-Vector LLC’s Dr. Nina Zumel has a three part series on Principal Components Regression that we think is well worth your time. Part 1: the proper preparation of data (including scaling) and use of principal components analysis (particularly for supervised learning or regression). Part 2: the introduction of y-aware scaling to direct the … Continue reading...

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Happy New Year, Mr. President. Data and Sentiment Analysis of Presidential New Year Speeches

May 31, 2016
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Happy New Year, Mr. President. Data and Sentiment Analysis of Presidential New Year Speeches

Salvino A. Salvaggio At a moment where many are preparing for the December 31st evening cocktail, the End of Year speech of the President of the Italian Republic is broadcast right on time at 8:30pm. A tradition which came to be with the constitutional establishment...

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Real-time model scoring for streaming data – a prototype based on Oracle Stream Explorer and Oracle R Enterprise

March 30, 2016
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Real-time model scoring for streaming data – a prototype based on Oracle Stream Explorer and Oracle R Enterprise

Whether applied to manufacturing, financial services, energy, transportation, retail, government, security or other domains, real-time analytics is an umbrella term which covers a broad spectrum of capabilities (data integration, analytics, business intelligence) built on streaming input from multiple channels. Examples of such channels are: sensor data, log data, market data, click streams, social media and monitoring imagery. Key metrics...

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In-depth analysis of Twitter activity and sentiment, with R

January 27, 2016
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In-depth analysis of Twitter activity and sentiment, with R

Astronomer and budding data scientist Julia Silge has been using R for less than a year, but based on the posts using R on her blog has already become very proficient at using R to analyze some interesting data sets. She has posted detailed analyses of water consumption data and health care indicators from the Utah Open Data Catalog,...

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Sentiment Analysis on Donald Trump using R and Tableau

January 2, 2016
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Sentiment Analysis on Donald Trump using R and Tableau

Recently, the presidential candidate Donal Trump has become controversial. Particularly, associated with his provocative call to temporarily bar Muslims from entering the US, he has faced strong criticism. Some of the many uses of social media analytics is sentiment analysis where we evaluate whether posts on a specific issue are positive or negative. We can

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Body Temperature Series of Two Beavers

December 4, 2015
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Body Temperature Series of Two Beavers

This short post will explore a funny dataset that forms part of R’s dataset library. The dataset will loaded out of interest of its content as well as using it to enagage with Hadley Wickhams’s ggplot2 package. The dataset that will be used to expl...

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