480 search results for "boxplot"

Autocommit with ceODBC is slow

February 10, 2015
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Autocommit with ceODBC is slow

You already know that a SQL INSERT is faster with bulk loading than inserting a record at a time, but what about the effect of autocommit on performance? While this is probably not specific to ceODBC, using autocommit is astonishingly slow. Here is how slow. First, the Python code to run the benchmark:import ceODBCimport datetimeimport osimport timeconnection_string="driver=sql...

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Google Analytics Dashboards with R & Shiny

January 27, 2015
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Google Analytics Dashboards with R & Shiny

One of the key activities of any web or digital analyst is to design and create dashboards. The main objective of a web analytics dashboard is to display the current status of your key web metrics and arrange them on a single view, so that information ...

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Simple Data Science Of Global Warming In KDnuggets

January 20, 2015
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Simple Data Science Of Global Warming In KDnuggets

Would love to get a post from you for KDnuggets (Gregory Piatetsky, KDnuggets President) Some days ago, Gregory Piatetsky invited me to write a post for KDnuggets. I couldn’t say no. He suggested to me some topics and I decided to experiment around climate change to demonstrate how easy is to see some evidences of … Continue reading...

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Multiple Comparisons with BayesFactor, Part 1

January 17, 2015
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Multiple Comparisons with BayesFactor, Part 1

On of the most frequently asked questions about the BayesFactor package is how to do multiple comparisons; that is, given that some effect exists across factor levels or means, how can we test whether two specific effects are unequal. In the next two posts, I'll explain how this can be done in two cases: in Part 1, I'll cover...

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Front-end for ggplot2

January 9, 2015
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Front-end for ggplot2

ggplot2 is a very powerful R package for data visualization, but mastering it is like learning another language in addition to R. Wouldn’t it be nice if there’s a simple GUI to ggplot2? That’s one major motivation behind the R package shinyData. Leveraging the power of shiny (which is another R package), majority of the … Continue reading...

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Video: H2O Talks by Trevor Hastie and John Chambers

January 2, 2015
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by Joseph Rickert In a recent post, where I presented some R related highlights of November's H20 World conference, I singled out and described talks by Trevor Hastie and John Chambers and remarked that it would be nice if the videos would be made available. Well, thanks to the generosity of the folks at H2O I got my wish....

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Cluster Analysis of the NFL’s Top Wide Receivers

December 29, 2014
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Cluster Analysis of the NFL’s Top Wide Receivers

“The time has come to get deeply into football. It is the only thing we have left that ain't fixed.”Hunter S. Thompson, Hey Rube Column, November 9, 2004I have to confess that I haven’t been following the NFL this year as much as planned or hoped.  On only 3 or 4 occasions this year have I been able to...

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My Commonly Done ggplot2 graphs: Part 2

December 18, 2014
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My Commonly Done ggplot2 graphs: Part 2

In my last post I described some of my commonly done ggplot2 graphs. It seems as though some people are interested in these, so I was going to follow this up with other plots I make frequently. Scatterplot colored by continuous variable The setup of the data for the scatterplots will be the same as

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Sequence of shopping carts in-depth analysis with R

December 4, 2014
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Sequence of shopping carts in-depth analysis with R

Although the sankey diagram from the previous post provided us with a very descriptive tool, we can consider it a rather exploratory analisys. As I mentioned, sequence mining can give us the opportunity to recommend this or that product based on previous purchases, but we should find the right moment and patterns in purchasing behavior.... Read More »

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Study of a plot

December 3, 2014
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Study of a plot

I began to think on a nice way of plotting campaign expenditures in a paper I'm working on. I thought this would be something like the following--simple but meaningful even when there are outliers in both tails. Though I like the seniors Tukey's boxplot and scatter plots, I had already used them the last time … Read More...

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