Category archives: R

R scripting, particularly spatial analysis using R.

R seminar series - part 6

Last update on March 12, 2015.

Sixth seminar of "R brown-bag seminars" was held in ICRAF today.  Leigh Winowiecki (PhD, Soil Scientist, CIAT) presented  "Introduction to ggplot"  topic. Presentation of today's seminar is available here.

Data used in this seminar is available here and source code from seminar 6 is shown below:

#Leigh Winowiecki
#ICRAF Training March 12, 2015
#load ...

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R seminar series - part 5

Last update on March 6, 2015.

After a one-week break, our brown-bag seminar series resumed again. In seminar 5, Antony Ndungu presented a number of different R graphing functions. Complete source code for the 5th seminar is available below, while the data used in the exercises can be found here

NB! From next week, we will looking at the wonderful ggplot2 ...

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R seminar series - part 3 & 4

Last update on Feb. 22, 2015.

The third and fourth R brown-bag seminars were held on 12th and 19th of February, respectively. Both seminars covered "Introduction to R". 

Complete source code for both seminars is available at this link, while the data used in the exercises can be found here.

In fifth seminar (5th of March), Anthony Ndungu (a.ndungu@cgiar ...

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R seminar series - part 2

Last update on Feb. 11, 2015.

Second seminar of "R seminar series" was held in ICRAF, Anthony Ndungu ( from Research Method Group (RMG) presented "Introduction to R". He also demonstrated RStudio Integrated Development Environment (IDE) and few examples. 

Presentation for this seminar is available at this link. Complete source code for each example is available at this link ...

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R user community @ ICRAF

Last update on Jan. 29, 2015.

R user community @ ICRAF

The ICRAF GeoScience Lab and Research Methods Group are launching a weekly brown-bag seminar series at ICRAF. The two main objectives of the seminars are to:

  • establish a R community of practice at ICRAF
  • stimulate sharing of experiences and knowledge
  • stimulate reproducible research

This space ( will be used to ...

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Mapping soil functional properties using multilevel models

Last update on March 13, 2014.

>*Tor-Gunnar Vågen (ICRAF), Leigh Winowiecki (CIAT), Lulseged T. Desta (CIAT) and Jerome E. Tondoh (CIAT)*

In this document we present examples of R functions and scripts that may be used to generate local maps of soil functional properties based on for example remote sensing data, climate surfaces and/or digital elevation models and their derivatives ...

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