Author archives: admin

Data visualization with ggplot2 for intermediate and advanced users

Last update on Feb. 10, 2020.



Presenter: Tor Vagen




Presentation Materials:




 

Introduction to data visualization with ggplot2

Last update on Jan. 20, 2020.



Presenter: Jason Kinyua




Presentation Materials:



Data manipulation in R

Last update on Jan. 15, 2020.



Presenter: Parmutia Makui





Presentation Materials:


In this seminar you will learn about data manipulation using the tidyverse package dplyr

ICRAFUseR: Introduction_Reading_data_into_R

Last update on Nov. 21, 2019.





Presenter: Aida Bargues Tobella



Presentation Recording:



Presentation Materials:


Download script here


Download the Data folder

ICRAFUseR: Introduction to Machine Learning in R

Last update on Nov. 11, 2019.

  • Sebastian Palmas
  • Kevin Oluoch

This is hands-on workshop is meant to introduce you to the basics of machine learning in R: more specifically, it will show you how to use R to work well known machine learning algorithms, including unsupervised (k-means clustering) and supervised methods (such as k-nearest neighbours, SVM, random forest).

There is ...

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ICRAFUseR: Introduction to R

Last update on Oct. 25, 2019.

Presenter: Faith Musili

Topics Covered:

  • What is R Programming language?
  • Why Learn R?
  • Who uses R?
  • R communities and groups
  • What is Rstudio?
  • Where to start
  • R packages
  • Data types in R
  • Good Practices when programming in R
  • Basic R

Presentation Materials:


New version of Africa Tree Finder on the Google Play Store

Last update on Nov. 7, 2017.

New version of Africa Tree Finder on the Google Play Store

A new version of the Africa Tree Finder is on the Google Play store with lots of improvements and new functionality. Have a look here: https://play.google.com/store/apps/details?id=com.icraf.gsl.africatreefinder&hl=en

R seminar series: Seminar 9

Last update on April 8, 2015.

If you remember, Tor introduced "dplyr" package back in seminar 7. This week, Anthony Ndungu (Research Method Group) continued with "dplyr" and some examples. You can see his presentation below  

Source code for 9th seminar is shown below.


#Antony Ndungu, RMG
#R Seminar
#Using ddply
#......................................................................
setwd("/Users/Antony/Documents/Antony/RMG stuffs/RTraining_ICRAF/Data/")
 
############################################
# library ...

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R seminar series: Seminar 8

Last update on March 27, 2015.

We have conducted 8 R Brown-bag seminars till now. This week we decided to revisit some of the examples shown in previous seminars, participants were asked to write code in RStudio and show results (code writing practice session).  

See the presentation of seminar 8 below  


Data used in this seminar is available here and source ...

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R seminar series - part 7

Last update on March 19, 2015.

ggplot2 and dplyr

The seventh R brownbag seminar was by Dr. Tor G. Vagen (Senior Scientist, ICRAF) who continued from the previous week and demonstrated more advanced use of ggplot2. The dplyr package, which will be the topic of several future seminars was also introduced.


# Tor-G Vågen
# R brownbag seminar march 19th, 2015
 
# For those ...

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