Conventions used

There are a number of text conventions used throughout this book.

Code in text: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: “The plotmap function from OpenStreetMapX can take the MapData object and plot the stored map.”

A block of code is set as follows:

plot([sin, cos], 0:0.1:2pi, 

labels=["sin" "cos"],

linecolor=[:orange :green],

linewidth=[1, 5])

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

plt = plot(data_block.geometry, 

fill_z = permutedims(data_block.deaths),

colorbar_title = "cholera deaths",

seriescolor = :Greys_3, 

linecolor = :darkgray, 

framestyle = :none)

Any command-line input or output is written as follows:

julia script.jl

Bold: Indicates a new term, an important word, or words that you see onscreen. For instance, words in menus or dialog boxes appear in bold. Here is an example: “Click New in the Edit environment variable window.”

Tips or Important Notes

Appear like this.