explain group as dimension

for #929
artifacts and attribution

AUTHORS

@@ -58,3 +58,4 @@ Alan Kavanagh <[email protected]>
 Johnny Peck <[email protected]>
 Kevin Kirsche <[email protected]>
 Meyfarth
+Ion Alberdi <[email protected]>

Changelog.md

@@ -1,5 +1,6 @@
 # 2.0 Series
 ## 2.0.0 beta 13
+* Example of a table showing group-aggregated data, by Ion Alberdi ([#929](https://github.com/dc-js/dc.js/pull/929))
 * Filtered items were not displayed after render in coordinate grid charts, by Matt Traynham ([#900](https://github.com/dc-js/dc.js/pull/900))
 * grammar/spelling/formatting fixes to annotated stock example, by Johnny Peck and Enrico Spinielli ([#956](https://github.com/dc-js/dc.js/pull/956), [#875](https://github.com/dc-js/dc.js/pull/875))
 * document bower install, by Mayfarth ([#899](https://github.com/dc-js/dc.js/pull/899))

web/examples/index.html

@@ -37,6 +37,7 @@ <h2>Examples of using dc.js</h2>
 <tr>
   <tr>
     <td><a href="stacked-bar.html">stacked bar</a></td>
+    <td><a href="table-on-aggregated-data.html">table on aggregated data</a></td>
 <tr>
 </table>
 </div></body></html>

web/examples/table-on-aggregated-data.html

@@ -33,6 +33,9 @@
      - the .order() is defined & defined to something else than the default value which seems to
        be either d3.ascending or descending. (a method that is undefined for .reduce()-d
        dimension groups is called else).
+
+     This demonstrates that a crossfilter group can (oddly, but usefully) be passed
+     as the dimension for a dc.dataTable, because it's just using `dimension.all()`.
   */
   var ndx              = crossfilter(experiments),
       exptDimension    = ndx.dimension(function(d) {return +d.Expt;}),