R: R Interface to the tth/ttm TeX to HTML Converter
tth
R Documentation
R Interface to the tth/ttm TeX to HTML Converter
Description
Convert TeX or LaTeX markup to HTML or HTML+MathML. Works
for snippets as well as complete documents.
Usage
tth(x, ..., fixup = TRUE, Sweave = TRUE, mode = NULL)
ttm(x, ..., fixup = TRUE, Sweave = TRUE, mode = NULL)
tth.control(a = FALSE, c = FALSE, d = FALSE, e = 2, f = NULL, g = FALSE,
i = FALSE, j = NULL, L = TRUE, n = NULL, p = NULL, r = TRUE,
t = FALSE, u = FALSE, w = NULL, y = 2, xmakeindxcmd = NULL, v = FALSE)
Arguments
x
character vector of (La)TeX code.
fixup
logical. Should the resulting code be fixed up by deleting blank or
empty lines and by replacing certain math symbols (such as not lower/greater etc.)?
Sweave
logical. Should the Sweave code environments Sinput/Soutput be
replaced by verabtim (and Schunk deleted) prior to conversion with tth/ttm?
mode
character. If this is set to "hex", "dec", or "named",
the corresponding mode is enforced for all character entity references. See also the details.
...
arguments passed to tth.control.
a
logical. Attempt automatic picture environment conversion
using latex2gif? Default omit.
c
logical. Prefix header "Content-type: text/HTML" (for direct web serving)?
d
logical. Disable definitions with delimited arguments? Default enable.
e
numeric specifying epsfbox handling: 0 no conversion, just ref.
1 convert to png/gif using user-supplied ps2png/gif.
2 (default) convert and include inline.
f
numeric specifying limit for built-up fraction nesting in display
equations to 0 to 9. Default is 5. For tth only.
g
logical. Remove (instead of guessing intent of) font commands. Default guess font/size.
i
logical. Use italic font for equations (like TeX)? Default roman.
For tth only.
j
numeric specifying index page length. Default is 20 lines.
L
logical or character. If logical: Should LaTeX commands (e.g., frac) be enabled
without a docmentclass line? If character: The base file (no extension) for LaTeX
auxiliary input.
n
numeric HTML title format control: 0 raw, 1 expand macros, 2 expand
equations.
p
character specifying additional directories (paths) to search for input files.
r
logical. Raw HTML output (omit header and tail) for inclusion in other files?
t
logical. Display built-up items in textstyle equations? Default is inline.
For tth only.
u
logical. Use unicode character encoding? Default is ISO-8859-1 (latin1).
w
numeric specifying HTML writing style. Default is no head/body tags,
0 no title, 1 single title only, head/body tags. 2 XHTML.
For tth only.
character specifying command for making index. Default is makeindex.
v
logical or numeric. Give verbose commentary? Verbosity level can also be
0 (none, same as FALSE), 1 (same as TRUE),
2 (even higher verbosity for debugging).
Details
tth and ttm are simple R wrapper functions,
calling command line tools of the same name which either need to be
provided by the R package tth or be installed on the system (and
available in the search path). The command line tools have been
written by Hutchinson (2012) and a detailed manual is available online
at http://hutchinson.belmont.ma.us/tth/manual.cgi (which
actually produces an HTML version of the manual in real time using
tth).
By default, the results of tth and ttm are processed further
to accomodate the Sweave environments and fixup certain
math symbols. Furthermore, optionally a particular mode for character
entity references (mathematical symbols, greek letters, and other special characters)
can be enforced. For example, the greek small letter mu
can be represented in "named" mode (&mgr; or μ),
in "hex" mode (μ) or "dec" model (μ).
Plain tth employs "dec" mode while plain ttm employs
"named" mode. But setting mode = "hex" would convert all
character entity references to hex mode etc.
See http://www.w3.org/TR/xml-entity-names/bycodes.html for the list of
character entity references employed and http://dev.w3.org/html5/html-author/charref
for a somewhat nicer display.
Value
tth/ttm return a character vector with HTML
code. tth.control returns a character vector with collapsed
(non-default) control arguments.
providing 
.