## Recently Published

##### Demonstration of dual y-axes (one y-axis left, onother one on the right)using sec.axis - ggplot2 version 2.2.0

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

##### Nested models

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

##### Nested Aov

Example of nested Anova

##### Combine multiple ggplot figures - Part II

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

##### Combine ggplot2 graphs

Quick example how to combine two individual ggplot2 graphs.

##### Notes on outliers

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!

##### Breakpoint analysis, segmented regression

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 exercise, and re-order factors

Merge example

##### Processing time

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

##### Search and replace

Some search and replace options for character elements

##### Rolling

Rollapply

##### Combine graphs

An exercise with multiple graphs

##### Strsplit

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

##### Winddata, weibull

Example analysis of wind speed distribution

##### Quick'n'dirty quantile regression starter

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

##### Session of Nov 19, 2013: ggplot2, stat_summary

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

##### Importing multiple files

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

##### Excercise

A little excercise, based on a current question

##### Session Sept 30, two variables in one plot

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

##### Session 5a

Practicing data aggregation, reshaping, and plotting

##### Introduction to R. Session 5.

Repetition

##### Introduction to R. Session 04.

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

##### Introduction to R. Session 03.

Working with dates

##### Introduction to R Session 02.

Adding new variables, Statistical test, Plots, Regression

##### Introduction to R. Session 01.

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

##### Some incomplete notes on the import of Excel files

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

##### Introduction to R. Session 00

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