243 search results for "pca"

reading raster data using library(parallel)

March 3, 2013
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reading raster data using library(parallel)

Recently, I have been doing some analysis for a project I am involved in. In particular, I was interested what role pacific sea surface temperatures play with regard to rainfall in East Africa. I spare you the details as I … Continue reading →

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Shading and Points with xtsExtra plot.xts

February 28, 2013
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Shading and Points with xtsExtra plot.xts

For some reason, I feel like have much better control with plot.xts function from the xtsExtra package described here over some of the other more refined R graphical packages. Maybe, it is just my simple mind, but recently I wanted to shade holding per...

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Finding Patterns Amongst Binary Variables with the homals Package

February 10, 2013
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Finding Patterns Amongst Binary Variables with the homals Package

It’s survey analysis season for me at work!  When analyzing survey data, the one kind of analysis I have realized that I’m not used to doing is finding patterns in binary data.  In other words, if I have a question … Continue reading →

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Extended (Simple) ASN Graph Visualization Example [R to D3]

February 8, 2013
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Extended (Simple) ASN Graph Visualization Example [R to D3]

The small igraph visualization in the previous post shows the basics of what you can do with the BulkOrigin & BulkPeer functions, and I thought a larger example with some basic D3 tossed in might be even more useful. Assuming you have the previous functions in your environment, the following builds a larger graph structure

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Modelling memory and news trajectories

February 6, 2013
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Modelling memory and news trajectories

Modelling memoryIn the text below I present two models I've made to quantify and visualise the diverging trajectories of memory and news events, and conclude that linear regression may be used to test which model best describes the story. First, though, I contextualise this with an illustration from the...

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For descriptive statistics, values below LLOQ set to …

February 3, 2013
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For descriptive statistics, values below LLOQ set to …

That is what I read the other day. For calculation of descriptive statistics, values below the LLOQ (lower limit of quantification)  were set to.... Then I wondered, wasn't there a trick in JAGS to incorporate the presence of missing data while es...

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Rcpp reaches 100 dependents on CRAN

January 23, 2013
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With the arrival earlier today of the stochvol package onto the CRAN network for R, our Rcpp project reached a new milestone: 100 packages have either a Depends:, Imports: or LinkingTo: statement on it.The full list will always be at the bottom of ...

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Oracle R Distribution Performance Benchmark

January 18, 2013
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Oracle R Distribution Performance Benchmark

Oracle R Distribution Performance Benchmarks Oracle R Distribution provides dramatic performance gains with MKL Using the recognized R benchmark R-benchmark-25.R test script, we compared the performance of Oracle R Distribution with and with...

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Decluttering ordination plots in vegan part 2: orditorp()

January 13, 2013
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Decluttering ordination plots in vegan part 2: orditorp()

In the earlier post in this series I looked at the ordilabel() function to help tidy up ordination biplots in vegan. An alternative function vegan provides is orditorp(), the last four letters abbreviating the words text or points. That is … Continue reading →

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Decluttering ordination plots in vegan part 2: orditorp()

January 13, 2013
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Decluttering ordination plots in vegan part 2: orditorp()

In the earlier post in this series I looked at the ordilabel() function to help tidy up ordination biplots in vegan. An alternative function vegan provides is orditorp(), the last four letters abbreviating the words text or points. That is a pretty good description of what orditorp() does; it...

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