Posts Tagged ‘ R Graphs ’

Apprentice Piece with Lattice Graphs

February 28, 2012
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Apprentice Piece with Lattice Graphs

Lattice graphs can be quite tedious. I don't use them too often and  when I need them I usually have to dig the archives for the parameter-details.The here presented example may serve as a welcome template for the usage of panel functions, panel o...

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Function for Adding Transparency to JPEG (Output = PNG)

December 12, 2011
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Function for Adding Transparency to JPEG (Output = PNG)

..see the function-code HERE.

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An Image Crossfader Function

November 10, 2011
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An Image Crossfader Function

Some project offspin, the jpgfader-function (the jpgfader-function in funny use can be viewed HERE):Read more »

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Add Transparency to JPEG – Yes, We Can!

November 9, 2011
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Add Transparency to JPEG – Yes, We Can!

...Just read you JPEG and add an alpha channel manually, then assign values for transparency. Of course for printing you need to use a device that accepts alpha.See how it's done HERE.

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R-Function GScholarScraper to Webscrape Google Scholar Search Result

November 9, 2011
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R-Function GScholarScraper to Webscrape Google Scholar Search Result

Based on my previous post on Web Scraping I coded and uploaded the Function "GScholarScraper" HERE for testing!The function will pull all (!) results, processing pages in chunks of 100 results/titles, and return a file with all titles, links, etc. It w...

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Yet Another One.. Animation with saveHTML / saveVideo from Package ANIMATION

October 12, 2011
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Yet Another One.. Animation with saveHTML / saveVideo from Package ANIMATION

...some more playing with saveHTML, as.raster() and rasterImage(), producing a "flickering screen":Read more »

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Plot Animation with Imported Images

October 10, 2011
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Plot Animation with Imported Images

...I really dig the animation package! ..so here's the outcome of my firsts encounters with saveHTML() - I produced an animation with pre-existing images by utilizing the functions readJPEG() and rasterImage() from the R-packages jpeg and ReadImage...

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Nice Species Distribution Maps with GBIF-Data in R

September 23, 2011
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Nice Species Distribution Maps with GBIF-Data in R

Here's an example of how to easily produce real nice distribution maps from GBIF-data in R with package maps... Read more »

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Use of Classification Trees to Investigate Traits of Invasive Species

September 20, 2011
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Use of Classification Trees to Investigate Traits of Invasive Species

Which traits make an alien species invasive?Due to what traits an alien species becomes established in a foreign flora?This kind of questions could be analysed by the use of recursive partitioning and classification trees..(the below example also inclu...

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Comparing Two Distributions

August 29, 2011
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Comparing Two Distributions

Here I compare two distributions, flowering duration of indigenous and allochtonous plant species. The hypothesis is that alien compared to indigenous plant species exhibit longer flowering periods.Read more »

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