Count Widget

Code

// Javascript to load the information (this requires jQuery)
// You can put this in the head of the page or in the page body.
<script type="text/javascript">
jQuery(document).ready(function($) {
  var group = 'economics';
  var url = 'http://thedatahub.org/api/search/dataset?groups=' + group;
  $.getJSON(url, function(data) {
    // class selector for the page element where info should be inserted
    $('.ckanjs-widget-count').html(data.count);
  });
});
</script>

// And somewhere in the body of the html page ...
// this is where dataset count will be inserted
<span class="ckanjs-widget-count"></span>
  

Demo (view source to see HTML and javascript)

Datasets in the group: (this number computed live from the API).