knitr - How to get R to output body scripts to format HTML tables using a similar approach as gvisTable? -


i work out how generate formatted html tables in way not require use of styles placed in html header. i've broadly asked question already, received 1 answer mentioned using header , answer involves using pandoc (update: see bottom of post regarding new answer posted since asking question. i'd have r function writes html formatting required formatted html table in 1 place.

i've been playing around gvistable , capable of writing relevant information in 1 place:

the following code

```{r results='asis'} simpledata <- data.frame(matrix(1:9, nrow=3)) tab2 <- gvistable(simpledata,                     options=list(width = 600, height = 300)) print(tab2, "chart") ```

will output following r markdown document:

<!-- jsheader --> <script type="text/javascript" src="http://www.google.com/jsapi"> </script> <script type="text/javascript">  // jsdata  function gvisdatatableid273f3d05cccd () {   var data = new google.visualization.datatable();   var datajson = [  [  1, 4, 7  ], [  2, 5, 8  ], [  3, 6, 9  ]  ]; data.addcolumn('number','x1'); data.addcolumn('number','x2'); data.addcolumn('number','x3'); data.addrows(datajson); return(data); }  // jsdrawchart function drawcharttableid273f3d05cccd() {   var data = gvisdatatableid273f3d05cccd();   var options = {}; options["allowhtml"] = true; options["width"] =    600; options["height"] =    300;       var chart = new google.visualization.table(        document.getelementbyid('tableid273f3d05cccd')      );      chart.draw(data,options);   }   // jsdisplaychart  function displaycharttableid273f3d05cccd() {   google.load("visualization", "1", { packages:["table"] });    google.setonloadcallback(drawcharttableid273f3d05cccd); }  // jschart  displaycharttableid273f3d05cccd()  <!-- jsfooter -->   //--> </script>  <!-- divchart -->  <div id="tableid273f3d05cccd"   style="width: 600px; height: 300px;"> </div>

and when placed in context, gvistable produced. see the second table in output.

thus, simple r function has outputted necessary html creation of sophisticated table. i'd have same degree of table formatting control seen in latex, r markdown. , given such posts appear on blogs, through syndication, in rss readers, , on formatting commands in body.

questions

  • is possible use approach similar gvis (e.g., scripts in html body) format html tables (e.g., lines, cell formatting, cell height , width, fonts, etc.)?
  • are there existing r functions support production of such tables?
  • do assumptions of question make sense, or there other way achieve broader aims of precise html table formatting r markdown?

update

joe has added answer previous question mentions 3 options (style in body; javascript embeds style in header; , scoped style blocks). guess main question remains whether there interfaces exist faciliate using such approaches r markdown code blocks.

from rstudio docs, can set knitr use custom stylesheet using:

# set custom css options(rstudio.markdowntohtml=   function(inputfile, outputfile) {           require(markdown)     markdowntohtml(inputfile, outputfile, stylesheet='custom.css')      } )

just replace stylesheet='custom.css' file path stylesheet.

then, can combine xtable , printwith option type="html" in chunk , you'll well-formatted table.

xtable produces latex if that's desirable.


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