An example showing the new dual y-axes feature in ggplot2, version 2.2.0. Using the new sec.axis option with data transformation to show two individual parameters in a plot, each parameters using its own y-axis. Dual axes plots are easy to manipulate, are not easy to understand, as described here: http://stackoverflow.com/a/3101876

Some thoughts, caveats on the use of nested models in a nested experiment.

Example of nested Anova

A more elaborate example on how to align multiple ggplot via grid.arrange and grid.draw

Quick example how to combine two individual ggplot2 graphs.

An outlier tells a story! Don't ignore this story. Oultiers can't be removed just because they are outliers! There must be a reason!

An introduction to the package "segmented": Segmented relationships in regression models with breakpoints / changepoints estimation. Plus some side-notes on regression, polynoms, curve-fitting...

Merge example

Check the processing times when analysing larger data sets. Different approaches or packages used can speed up a specific task.

Some search and replace options for character elements

Rollapply

An exercise with multiple graphs

Split an element into multiple parts based on a given character.

Example analysis of wind speed distribution

just a rough script to get going with quantile regression via nlrq {quantreg}

ggplot layers, summaries and text, confidence bands, various error bars, ...

A few ways how to import multiple files into R in one go.

A little excercise, based on a current question

Repetition and excercise with graphs, plotting two variables in one graph with ggplot2

Practicing data aggregation, reshaping, and plotting

Repetition

Graphs - some base plots and ggplot. Advanced "base" plots: formatting, multiple axes

Working with dates

Adding new variables, Statistical test, Plots, Regression

importing csv files, selecting data, applying functions, aggregation of data

The first piece of advice is: avoid using Excel. See http://cran.r-project.org/doc/manuals/R-data.html#Reading-Excel-spreadsheets

The first R session for the R workshop. Working with a simple data frame, selecting data.