25.1 KnitR Setup
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Packages used in this chapter include diagram (Soetaert 2020), dplyr (Wickham et al. 2021), ggplot2 (Wickham et al. 2020), magrittr (Bache and Wickham 2020), xtable (Dahl et al. 2019), Hmisc (Harrell 2021), and rattle (G. Williams 2020).
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 also be installed using $ wajig install r-cran-<pkgname>.
# Load required packages from local library into the R session.
library(rattle) # Dataset: weatherAUS.
library(magrittr) # Data pipelines: %>% %T>% %<>%.
library(ggplot2) # Visualise data.
library(xtable) # Format R data frames as LaTeX tables.
library(Hmisc) # Escape special LaTeX charaters.
library(diagram) # Produce a flowchart.
library(dplyr) # Data wrangling.
library(scales)
library(knitr)The rattle::weatherAUS dataset is loaded into the template
variable ds and further template variables are setup as
introduced by Graham J. Williams (2017). See
Chapter 8 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()A random sample of the dataset:
ds %>% sample_frac()## # A tibble: 176,747 x 24
## date location min_temp max_temp rainfall evaporation sunshine
## <date> <chr> <dbl> <dbl> <dbl> <dbl> <dbl>
## 1 2020-04-15 Portland 12.3 24.7 0 NA NA
## 2 2017-04-15 BadgerysCreek 9.5 24 0 NA NA
## 3 2019-01-25 CoffsHarbour 21.5 30.2 0 NA NA
## 4 2017-04-08 Richmond 10.4 25.7 0 NA NA
## 5 2020-03-09 Ballarat 10 19 0 NA NA
## 6 2014-03-29 Cairns 23.9 30.9 0.2 4.4 7.3
## 7 2012-08-18 MelbourneAirport 6.3 12.2 13.6 2 1.2
## 8 2018-12-03 Cobar 14.7 29.3 0.2 NA NA
## 9 2010-04-25 Tuggeranong 10.1 19.4 12.2 NA NA
## 10 2015-01-26 Penrith 20 20.7 0 NA NA
## # … with 176,737 more rows, and 17 more variables: wind_gust_dir <ord>,
## # wind_gust_speed <dbl>, wind_dir_9am <ord>, wind_dir_3pm <ord>,
## # wind_speed_9am <dbl>, wind_speed_3pm <dbl>, humidity_9am <int>,
## # humidity_3pm <int>, pressure_9am <dbl>, pressure_3pm <dbl>,
## # cloud_9am <int>, cloud_3pm <int>, temp_9am <dbl>, temp_3pm <dbl>,
## # rain_today <fct>, risk_mm <dbl>, rain_tomorrow <fct>References
Bache, Stefan Milton, and Hadley Wickham. 2020. Magrittr: A Forward-Pipe Operator for r. https://CRAN.R-project.org/package=magrittr.
Dahl, David B., David Scott, Charles Roosen, Arni Magnusson, and Jonathan Swinton. 2019. Xtable: Export Tables to LaTeX or HTML. http://xtable.r-forge.r-project.org/.
Harrell, Frank E, Jr. 2021. Hmisc: Harrell Miscellaneous. https://CRAN.R-project.org/package=Hmisc.
Soetaert, Karline. 2020. Diagram: Functions for Visualising Simple Graphs (Networks), Plotting Flow Diagrams. https://CRAN.R-project.org/package=diagram.
Wickham, Hadley, Winston Chang, Lionel Henry, Thomas Lin Pedersen, Kohske Takahashi, Claus Wilke, Kara Woo, Hiroaki Yutani, and Dewey Dunnington. 2020. Ggplot2: Create Elegant Data Visualisations Using the Grammar of Graphics. https://CRAN.R-project.org/package=ggplot2.
Wickham, Hadley, Romain François, Lionel Henry, and Kirill Müller. 2021. Dplyr: A Grammar of Data Manipulation. https://CRAN.R-project.org/package=dplyr.
Williams, Graham. 2020. Rattle: Graphical User Interface for Data Science in r. https://rattle.togaware.com/.
Williams, Graham J. 2017. The Essentials of Data Science: Knowledge Discovery Using r. The r Series. CRC Press.
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