2620 search results for "Ggplot2"

Analyzing the DVI Indicator – Entry Power

January 15, 2014
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Analyzing the DVI Indicator – Entry Power

In a recent post, I did some analysis of the efficiency of the DVI indicator. That was pretty much all I had to say back then, but that quickly changed. While reading Building Reliable Trading Systems, by Keith Fitschen I stumbled upon an alternative way to visualize entry efficiency – the entry power. The chart

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Why R is Better Than Excel for Fantasy Football (and most other) Data Analysis

January 13, 2014
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Many articles have been written on why R is better than Excel for data analysis.  In this post, I will summarize the reasons why R is advantageous in most data The post Why R is Better Than Excel for Fantasy Football (and most other) Data Analysis appeared first on Fantasy Football Analytics.

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Solving Quadratic Progams with R’s quadprog package

January 13, 2014
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Solving Quadratic Progams with R’s quadprog package

In this post, we'll explore a special type of nonlinear constrained optimization problems called quadratic programs. Quadratic programs appear in many practical applications, including portfolio optimization and in solving support vector machine (SVM) classification problems. There are several packages available to solve quadratic programs in R. Here, we'll work with the quadprog package. Before we dive...

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The Extra Step: Graphs for Communication versus Exploration

January 12, 2014
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The Extra Step: Graphs for Communication versus Exploration

Visualization is a useful tool for data exploration and statistical analysis, and it’s an important method for communicating your discoveries to others. While those two uses of visualization are related, they aren’t identical. One of the reasons that I like ggplot so much is that it excels at layering together multiple views and summaries of Related posts:

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Basic A/B Testing plots and stats with R

January 12, 2014
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Basic A/B Testing plots and stats with R

Have you used Google Analytics Content Experiments? I’ve been using it lately and the most useful thing is that all data are integrated into the API to do what you want to do except for the standard reports. So, you can get them into your favorite data analysis tool and get more things done. In ...read more

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How Much Time to Conceive?

January 12, 2014
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How Much Time to Conceive?

This morning my wife presented me with a rather interesting statistic: a healthy couple has a 25% chance of conception every month , and that this should result in a 75% to 85% chance of conception after a year. This sounded rather interesting and it occurred to me that it really can’t be that simple.

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User Request – Middle Segments

January 9, 2014
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User Request – Middle Segments

Recently, a user of ggtern was desirable to produce a plot similar to what can be found HERE. This is relatively simple, given the use of layers during plot construction. In ggplot2 (and hence ggtern), one can define a 'global' dataframe in the constructor, which gets picked up by each layer, UNLESS one states an… The post User...

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What The Hell Is Pi Doing Here?

January 8, 2014
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What The Hell Is Pi Doing Here?

Nothing in Nature is random … A thing appears random only through the incompleteness of our knowledge (Benedict Spinoza) This is one of my favorite mathematical mysteries. In 1991 David Boll was trying to confirm that the neck of the Mandelbrot Set is 0 in thickness. Neck is located at -0.75+0i (where two biggest circles

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Fast-track publishing using knitr: exporting images for sharing and press (part III)

January 7, 2014
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Fast-track publishing using knitr: exporting images for sharing and press (part III)

(This article was first published on G-Forge » R, and kindly contributed to R-bloggers) Images can be a powerful medium if used right. The image is CC by alemdag. Fast-track publishing using knitr is a short series on how I use knitr to speedup publishing in my research. This is the third article in the series devoted to plots....

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ggtern 1.0.2.0 on CRAN

January 4, 2014
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An update to ggtern, version 1.0.2.0, is now available on CRAN! This version includes a number of updates, and, additional functionality, which can be summarized below: Better Documentation Theme commands were brought back inline with the ggplot2 format, for example, theme_tern_bw() has been superceded by theme_bw() as per ggplot2 The default theme (theme_gray()) was modified… The post ggtern...

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