Tag Archives: R

two-minutes video tutorials for R

Posted on April 13, 2012 by

I just came across this blog with (by the time of writing) sixty two-minutes video tutorials on how to do things in R. Especially nice for those who like to learn by watching and listening. But do pay attention while … Continue reading →

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ReshapeGUI – a tool to learn to use reshape2

Posted on April 3, 2012 by

The package Reshape2 in R is a very powerful tool to flexibly restructure and aggregate data. For users familiar with the pivot table function in Excel or Libreoffice/Openoffice, this tool offers similar (and more) functionality, albeit from the command line. … Continue reading →

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Start R inside GRASS but keep the terminal prompt

Posted on June 17, 2011 by

I often run R from within GRASS GIS. For example using R as a scripting language to automate GIS analysis. Or to use statistical models in R on spatial data in GRASS. I used to open R in the terminal. … Continue reading →

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Overview of R resources

Posted on May 18, 2011 by

Another nice overview of R resources: http://www.backsidesmack.com/r-resources/. The authors will keep the list updated, so worth bookmarking it. And if you have good suggestions,make sure to leave him a comment.

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Extract values from multiple rasters

Posted on May 4, 2011 by

I got a question how to create a loop function using the “for” command to process Worldclim layers, all with similar names (e.g. bio1-19, tmin1-12, tmax1-12, prec1-12). The loop would need to repeat for each iteration: adding a column with … Continue reading →

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SQLiteMap

Posted on May 2, 2011 by

Looks interesting, a R package that provides bindings to Spatialite functionalities. Through this bindings one can carry out the spatial functions available in Spatialite from within R using simple SQL statements.

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New version of RStudio out

Posted on April 14, 2011 by

There is a new version (0,93) of Rstudio out, with some nice source editor enhancements, a new Customizable Layout and Appearance option, interactive plotting and more. Check out the RStudio blog or the release notes release notes on the RStudio … Continue reading →

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R/GRASS connection: more than the sum of its parts

Posted on March 25, 2011 by

GRASS GIS is a very powerfull GIS offering an extensive set of tools for geospatial data management and analysis, image processing, and spatial modeling. The possibility to directly interact with R further improves the geospatial analysis capabilities of GRASS (see … Continue reading →

Posted in Data handling, GIS, GRASS GIS, Modelling, R computing environment | Tagged , , , , , | 13 Comments

Combining text from data frame in one text string in R

Posted on March 2, 2011 by

Earlier I wrote about the custom STRJOIN function in OpenOffice. A very handy function when you need to combine all values in a row or column (or combination of the two), separated by a delimiter. In R this is (also) … Continue reading →

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Finding and renaming long file names with R

Posted on February 28, 2011 by

I have never given it a though, but there is apparently a limit to the length of file names that can be handled by Windows Explorer of Windows XP. I found out when trying to copy my Zotero folder to … Continue reading →

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