# LaTeX back-end

The following options are available when the LaTeX backend is used. Those can be passed as keywords when calling the function pretty_table:

• body_hlines::Vector{Int}: A vector of Int indicating row numbers in which an additional horizontal line should be drawn after the row. Notice that numbers lower than 1 and equal or higher than the number of printed rows will be neglected. This vector will be appended to the one in hlines, but the indices here are related to the printed rows of the body. Thus, if 1 is added to body_hlines, then a horizontal line will be drawn after the first data row. (Default = Int[])
• highlighters::Union{LatexHighlighter, Tuple}: An instance of LatexHighlighter or a tuple with a list of LaTeX highlighters (see the section LaTeX highlighters).
• hlines::Union{Nothing, Symbol, AbstractVector}: This variable controls where the horizontal lines will be drawn. It can be nothing, :all, :none or a vector of integers. (Default = nothing)
• If it is nothing, which is the default, then the configuration will be obtained from the table format in the variable tf (see LatexTableFormat).
• If it is :all, then all horizontal lines will be drawn.
• If it is :none, then no horizontal line will be drawn.
• If it is a vector of integers, then the horizontal lines will be drawn only after the rows in the vector. Notice that the top line will be drawn if 0 is in hlines, and the header and subheaders are considered as only 1 row. Furthermore, it is important to mention that the row number in this variable is related to the printed rows. Thus, it is affected by filters, and by the option to suppress the header noheader. Finally, for convenience, the top and bottom lines can be drawn by adding the symbols :begin and :end to this vector, respectively, and the line after the header can be drawn by adding the symbol :header.
Info

The values of body_hlines will be appended to this vector. Thus, horizontal lines can be drawn even if hlines is :none.

• label::AbstractString: The label of the table. If empty, then no label will be added. (Default = "")
• longtable_footer::Union{Nothing, AbstractString}: The string that will be drawn in the footer of the tables before a page break. This only works if table_type is :longtable. If it is nothing, then no footer will be used. (Default = nothing)
• noheader::Bool: If true, then the header will not be printed. Notice that all keywords and parameters related to the header and sub-headers will be ignored. (Default = false)
• nosubheader::Bool: If true, then the sub-header will not be printed, i.e. the header will contain only one line. Notice that this option has no effect if noheader = true. (Default = false)
• row_number_alignment::Symbol: Select the alignment of the row number column (see the section Alignment). (Default = :r)
• table_type::Union{Nothing, Symbol}: Select which LaTeX environment will be used to print the table. Currently supported options are :tabular for tabular or :longtable for longtable. If it is nothing then the default option of the table format will be used. (Default = nothing)
• tf::LatexTableFormat: An instance of the structure LatexTableFormat that defines the general format of the LaTeX table.
• vlines::Union{Nothing, Symbol, AbstractVector}: This variable controls where the vertical lines will be drawn. It can be :all, :none or a vector of integers. In the first case (the default behavior), all vertical lines will be drawn. In the second case, no vertical line will be drawn. In the third case, the vertical lines will be drawn only after the columns in the vector. Notice that the left border will be drawn if 0 is in vlines. Furthermore, it is important to mention that the column number in this variable is related to the printed columns. Thus, it is affected by filters, and by the columns added using the variable show_row_number. Finally, for convenience, the left and right border can be drawn by adding the symbols :begin and :end to this vector, respectively. (Default = :none)
• wrap_table::Union{Nothing, String}: This variable controls whether to wrap the table in a environment defined by the variable wrap_table_environment. Defaults to true. When false, the printed table begins with \\begin{tabular}. This option does not work with :longtable. If it is nothing then the default option of the table format will be used. (Default = nothing)
• wrap_table_environment::Union{Nothing, String}: Environment that will be used to wrap the table if the option wrap_table is true. If it is nothing then the default option of the table format will be used. (Default = nothing)

## LaTeX highlighters

A set of highlighters can be passed as a Tuple to the highlighters keyword. Each highlighter is an instance of the structure LatexHighlighter. It contains the following two fields:

• f::Function: Function with the signature f(data, i, j) in which should return true if the element (i, j) in data must be highlighted, or false otherwise.
• fd::Functions: A function with the signature f(data, i, j, str)::String in which data is the matrix, (i, j) is the element position in the table, and str is the data converted to string. This function must return a string that will be placed in the cell.

The function f has the following signature:

f(data, i, j)

in which data is a reference to the data that is being printed, i and j are the element coordinates that are being tested. If this function returns true, then the highlight style will be applied to the (i, j) element. Otherwise, the default style will be used.

Notice that if multiple highlighters are valid for the element (i, j), then the applied style will be equal to the first match considering the order in the Tuple highlighters.

If the function f returns true, then the function fd(data, i, j, str) will be called and must return the LaTeX string that will be placed in the cell.

If only a single highlighter is wanted, then it can be passed directly to the keyword highlighter without being inside a Tuple.

There are two helpers that can be used to create LaTeX highlighters:

LatexHighlighter(f::Function, envs::Union{String,Vector{String}})
LatexHighlighter(f::Function, fd::Function)

The first will apply recursively all the LaTeX environments in envs to the highlighted text whereas the second let the user select the desired decoration by specifying the function fd.

Thus, for example:

LatexHighlighter((data,i,j)->true, ["textbf", "small"])

will wrap all the cells in the table in the following environment:

\textbf{\small{<Cell text>}}
Info

If only a single highlighter is wanted, then it can be passed directly to the keyword highlighter without being inside a Tuple.

Note

If multiple highlighters are valid for the element (i, j), then the applied style will be equal to the first match considering the order in the tuple highlighters.

Note

If the highlighters are used together with Formatters, then the change in the format will not affect the parameter data passed to the highlighter function f. It will always receive the original, unformatted value.

julia> t = 0:1:20;

julia> data = hcat(t, ones(length(t)) * 1, 1 * t, 0.5 .* t.^2);

julia> header = (["Time", "Acceleration", "Velocity", "Distance"],
[ "[s]",  "[m/s\$^2\$]",    "[m/s]",      "[m]"]);

julia> hl_v = LatexHighlighter((data, i, j) -> (j == 3) && data[i, 3] > 9, ["color{blue}","textbf"]);

julia> hl_p = LatexHighlighter((data, i, j) -> (j == 4) && data[i, 4] > 10, ["color{red}", "textbf"])

julia> hl_e = LatexHighlighter((data, i, j) -> (i == 10), ["cellcolor{black}", "color{white}", "textbf"])

julia> pretty_table(data, backend = Val(:latex), header = header, highlighters = (hl_e, hl_p, hl_v))

Note

The following LaTeX packages are required to render this example: colortbl and xcolor.

## LaTeX table formats

The following table formats are available when using the LaTeX back-end:

tf_latex_default (Default)

tf_latex_simple

tf_latex_modern

Note

You need the LaTeX package array to use the vertical divisions with this format.

tf_latex_booktabs

Note

You need the LaTeX package booktabs to render this format.