brew.md
In brew: Templating Framework for Report Generation

brew test catprint

Code
  brew("catprint.brew", envir = new.env(), extendedErrorReport = TRUE)
Output
  DATA FRAME OUTPUT (LISTS TOO)

  Let's run this: <% data(iris) %>

  Let's look at some R output:

  If we say this: <% head(iris) %>
  the output is this:

  nothing right?

  if we say this: <%= head(iris) %>
  it's an error because cat() cannot handle lists.

  But if we say this: <% print(head(iris)) %>
  the output is this:
    Sepal.Length Sepal.Width Petal.Length Petal.Width Species
  1          5.1         3.5          1.4         0.2  setosa
  2          4.9         3.0          1.4         0.2  setosa
  3          4.7         3.2          1.3         0.2  setosa
  4          4.6         3.1          1.5         0.2  setosa
  5          5.0         3.6          1.4         0.2  setosa
  6          5.4         3.9          1.7         0.4  setosa


  VECTOR OUTPUT

  We'll work with v: <% v <- head(iris)$Sepal.Length %>


  If we say this: <%= v %>
  the output is this:
  5.1 4.9 4.7 4.6 5 5.4
  because 'cat()' coerces v to a character vector

  How about <%= v > 5 %>
  TRUE FALSE FALSE FALSE FALSE TRUE
  So cat() can deal with any vector

  And if we say this: <% print(v) %>
  the output is:
  [1] 5.1 4.9 4.7 4.6 5.0 5.4