Go to TogaWare.com Home Page. Data Science Desktop Survival Guide
by Graham Williams
Duck Duck Go


Visualisation Setup


Packages used in this chapter include GGally, RColorBrewer, colorRamps, dplyr, epitools, ggplot2, randomForest, scales, stringr, magrittr, and rattle.

Packages are loaded into the currently running R session from your local library directories on disk. Missing packages can be installed using utils::install.packages() within R. On Ubuntu, for example, R packages can be installed using wajig install r-cran-<pkgname>.

# Load required packages from local library into the R session.

library(GGally)       # Pairs plots.
library(RColorBrewer) # Brew various colour ranges.
library(colorRamps)   # Generate colour ranges: blue2green2red().
library(dplyr)        # glimpse().
library(epitools)     # Colour selection: colors.plot().
library(ggplot2)      # Visualise data.
library(scales)       # commas(), percent().
library(stringr)      # str_replace_all().

The rattle::weatherAUS dataset is loaded into the template variable ds and further template variables are setup as introduced in Williams (2017). See Chapter 7 for details.

dsname <- "weatherAUS"
ds     <- get(dsname)

nobs   <- nrow(ds)

vnames <- names(ds)
ds    %<>% clean_names(numerals="right")
names(vnames) <- names(ds)

vars   <- names(ds)
target <- "rain_tomorrow"
vars   <- c(target, vars) %>% unique() %>% rev()

We also do a little more to set the data up for demonstrating various approaches to visualisation. As with the model template, a number of template variables are identified here. We also a little data wrangling to remove all missing values by performing a missing value imputation with randomForest::na.roughfix().

risk   <- "risk_mm"
id     <- c("date", "location")
ignore <- c(risk, id)
vars   <- setdiff(vars, ignore)
inputs <- setdiff(vars, target)
ds[vars] %<>% na.roughfix()

Support further development by purchasing the PDF version of the book.
Other online resources include the GNU/Linux Desktop Survival Guide.
Books available on Amazon include Data Mining with Rattle and Essentials of Data Science.
Popular open source software includes rattle and wajig.
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