28.25 Adding a Flowchart
REVIEW LaTeX and R both support extensive
capability for generating pictures. Here we use the (Soetaert 2020)
package to draw a flow chart, something that is a common requirement
in documentation. The simple example shows the process of converting a
.Rnw file using knitr (Xie 2023) to a LaTeX file which can
then be processed by
pdflatex to generate the .pdf file. The
result can be seen in Figure @ref(fig:knitr:knitr_diagram_flowchart).
# Load package from the local library into the R session. library(diagram) # Identify some names for the nodes of the flowchart. <- c(".Rnw", ".tex", ".pdf") names # Set up the connectivity data. <- c(0, 0, 0, connect "knitr", 0, 0, 0, "pdflatex", 0) # Constract a connectivity matrix and plot the flowchart. matrix(nrow=3, ncol=3, byrow=TRUE, data=connect) %>% plotmat(pos=c(1, 2), name=names, box.col="orange")
There are many more possibilities provided by
diagram (Soetaert 2020) and if interested you can explore
Soetaert, Karline. 2020. Diagram: Functions for Visualising Simple Graphs (Networks), Plotting Flow Diagrams. https://CRAN.R-project.org/package=diagram.
———. 2023. Knitr: A General-Purpose Package for Dynamic Report Generation in r. https://yihui.org/knitr/.
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