This page shows some examples on data mining with R provided at other websites. More examples on data mining with R can be found in my book "R and Data Mining: Examples and Case Studies", which is downloadable as a .PDF file at the link.
Clustering in R: R examples on various clustering techniques, with R codes and dataset provided. See section 4.15 in the link for exercises instructions.
Getting Started with Latent Dirichlet Allocation using RTextTools + topicmodels
An example of Twitter sentiment analysis based on affective lexicons in R
Time Series Analysis
Social Network Analysis
Interactive network graphs with R package networkD3
Visualization of Geo-spatial Data
Slides on R Graphics by Paul Murrell:
It provides examples on advanced graphic controls.
3D bar charts, matrix contours, microarray heatmaps, network graphs, scatter & pairs plots , Ramachandran (phi/psi) plots, and linear models
Web Applications with Shiny
Debugging and Error Handling
Interaction with Other Programming Languages
R talks to Weka about Data Mining: an example on using R to call Weka's C4.5 algorithm and build a decision tree