Chapter 16 Regression and ANOVS crib sheet

This chapter provides all the code chunks that may be useful in the context of the data analysis component of the assignment. The data set used to illustrate is the mussels data, that can be analysed using one way ANOVA and regression in the context of calibrating a relationship.

You should look through ALL the handouts provided on these techniques to understand the underlying theory. This “crib sheet” simply provides access to useful code.

1. ALWAYS CHECK THAT THE STEPS HAVE BEEN TAKEN IN THE RIGHT ORDER.
2. LOOK AT THE DATA YOU HAVE LOADED FIRST
3. USE YOUR OWN VARIABLE NAMES
4. PASTE IN CODE CHUNKS CAREFULLY; LEAVING GAPS BETWEEN EACH CHUNK
5. COMMENT ON ALL THE STEPS

16.1 Packages needed

Include this chunk at the top of you analysis to ensure that you have all the packages. It also includes the wrapper to add buttons to a data table if you want to use this. Remember that data tables can only be included in HTML documents.

library(ggplot2)
library(dplyr)
library(mgcv)
library(DT)
theme_set(theme_bw())
dt<-function(x) DT::datatable(x, 
    filter = "top",                         
    extensions = c('Buttons'), options = list(
    dom = 'Blfrtip',
    buttons = c('copy', 'csv', 'excel'), colReorder = TRUE
  ))