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Equation chunk — as_equation • flextable

This function is used to insert equations into flextable.

It is used to add it to the content of a cell of the flextable with the functions compose(), append_chunks() or prepend_chunks().

To use this function, package 'equatags' is required; also equatags::mathjax_install() must be executed only once to install necessary dependencies.

as_equation(x, width = 1, height = 0.2, unit = "in", props = NULL)

x

values containing the 'MathJax' equations

width, height

size of the resulting equation

unit

unit for width and height, one of "in", "cm", "mm".

props

an fp_text_default() or officer::fp_text() object to be used to format the text. If not specified, it will be the default value corresponding to the cell.

Other chunk elements for paragraph: as_b(), as_bracket(), as_chunk(), as_highlight(), as_i(), as_image(), as_sub(), as_sup(), as_word_field(), colorize(), gg_chunk(), grid_chunk(), hyperlink_text(), linerange(), minibar(), plot_chunk()

library(flextable)
if (require("equatags")) {
  eqs <- c(
    "(ax^2 + bx + c = 0)",
    "a \\ne 0",
    "x = {-b \\pm \\sqrt{b^2-4ac} \\over 2a}"
  )
  df <- data.frame(formula = eqs)
  df


  ft <- flextable(df)
  ft <- compose(
    x = ft, j = "formula",
    value = as_paragraph(as_equation(formula, width = 2, height = .5))
  )
  ft <- align(ft, align = "center", part = "all")
  ft <- width(ft, width = 2)
  ft
}
#> Loading required package: equatags

           
formula
           

               
                
                 
                  (
                  a
                  x2
                  +
                  b
                  x
                  +
                  c
                  =
                  0
                  )
                 
                 
                  (ax^2 + bx + c = 0)
                 
                
               (ax2+bx+c=0)
           

               
                
                 
                  a
                  ≠
                  0
                 
                 
                  a \ne 0
                 
                
               a=0
           

               
                
                 
                  x
                  =
                  
                   
                    −
                    b
                    ±
                    
                     
                      b2
                      −
                      4
                      a
                      c
                     
                    
                   
                   
                    2
                    a
                   
                  
                 
                 
                  x = {-b \pm \sqrt{b^2-4ac} \over 2a}
                 
                
               x=2a−b±b2−4ac ​​

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