3229 search results for "map"

Impact of correlated predictions on the variance of an ensemble model

August 21, 2014
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Impact of correlated predictions on the variance of an ensemble model

Let and be the prediction errors of two statistical/machine learning algorithms. and have relatively low bias, and high variances and . They are also correlated, having a Pearson correlation coefficient equal to . Aggregating models and might result in a … Continue reading →

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Extracting Latent Variables from Rating Scales: Factor Analysis vs. Nonnegative Matrix Factorization

August 21, 2014
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Extracting Latent Variables from Rating Scales: Factor Analysis vs. Nonnegative Matrix Factorization

For many of us, factor analysis provides a gateway to learning how to run and interpret nonnegative matrix factorization (NMF). This post will analyze a set of ratings on a 218 item adjective checklist using both principal axis factor analysis and NMF....

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CRAN release jsonlite 0.9.10 (RC)

August 19, 2014
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CRAN release jsonlite 0.9.10 (RC)

The jsonlite package is a JSON parser/generator optimized for the web. It implements a bidirectional mapping between JSON data and the most important R data types. This is very powerful for interacting with web APIs, or to build pipelines where...

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Changes to FSA — Estimating Abundance

August 17, 2014
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Changes to FSA — Estimating Abundance

I mentioned previously, that I have been updating the Mark-Recapture vignettes.  That has morphed into a document that is an update of the Mark-Recapture Closed and Open vignettes and the depletion/removal vignettes and associated FSA functions.  Some of the changes … Continue reading →

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21 R navigation tools

August 17, 2014
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21 R navigation tools

Navigation gets you from where you are to where you want to be. Speaking of navigation, you can jump to selected sections of this post: Navigation; R-bloggers; Task views; Rdocumentation.org; sos package; ??; apropos; ls; methods; getAnywhere; :::; find; args; grep; %in%; str; getwd; file.choose; Spyglass summary; browser; See also. Overview Figure 1: A map The post

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Easier way to chain commands using Pipe function

August 15, 2014
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In pipeR 0.4 version, one of the new features is Pipe() function. The function basically creates a Pipe object that allows command chaining with $, and thus makes it easier to perform operations in pipeline without any external operator. In this post, I will introduce how to use this function and some basic knowledge about how it works. But before...

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Easier way to chain commands using Pipe function

August 15, 2014
By

In pipeR 0.4 version, one of the new features is Pipe() function. The function basically creates a Pipe object that allows command chaining with $, and thus makes it easier to perform operations in pipeline without any external operator. In this post, I will introduce how to use this function and some basic knowledge about how it works. But before...

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Reasonable Inheritance of Cluster Identities in Repetitive Clustering

August 15, 2014
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Reasonable Inheritance of Cluster Identities in Repetitive Clustering

… or Inferring Identity from Observations Let’s assume the following application: A conservation organisation starts a project to geographically catalogue the remaining representatives of an endangered plant species. For that purpose hikers are encouraged to communicate the location of the plant … Continue reading →

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Propensity Modeling, Causal Inference, and Discovering Drivers of Growth

August 14, 2014
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Propensity Modeling, Causal Inference, and Discovering Drivers of Growth

Imagine you just started a job at a new company. You watched World War Z recently, so you're in a skeptical mood, and given that your last two startups failed from what you believe to be a lack of data, you're giving everything an extra critical eye. You start by thinking about the impact of the sales team. How...

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Winston Chang’s “Interactive Graphics with ggvis” at useR! 2014

August 14, 2014
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gggggviz-Greenshot_2014-08-15_00-07-06

Winston Chang’s “Interactive Graphics with ggvis” talk at useR! 2014 was in many ways a...

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