function choroplether(data){
        // get the currently selected style
        cartodb.createVis('map', 'http://team.cartodb.com/api/v2/viz/d4c88194-7bc7-11e4-ab0a-0e853d047bba/viz.json')
        .done(function(vis, layers) {
          var subLayer = layers[1].getSubLayer(0);
          var sql, style, arr = [], min, max, step;
          for (i in data){
            if(data[i].trim().length>0){
              var d = data[i].split(',');
              arr.push( "('"+d[0]+"',"+d[1]+")");
              var k = parseFloat(d[1]);
              if(k<min || min==null){min = k}
              if(k>max || max==null){max = k}
            }
            // console.log(sql)
          }
          step = (max-min)/7;
          sql = "WITH c AS (SELECT * FROM (VALUES "+arr.join(',')+") n (iso, val)) "
              + "SELECT c.val, c.iso, the_geom, the_geom_webmercator, cartodb_id FROM "
              + "choroplether t, c WHERE t.iso2 = c.iso";
          style = "#choroplether{ polygon-fill:  #0C2C84; polygon-opacity: 0.6; line-color: #0C2C84; line-width: 0.5; line-opacity: 1; } "
                + "#choroplether [ val <= "+(max-step)+"] { polygon-fill: #225EA8; } "
                + "#choroplether [ val <= "+(max-2*step)+"] { polygon-fill: #1D91C0; } "
                + "#choroplether [ val <= "+(max-3*step)+"] { polygon-fill: #41B6C4; } "
                + "#choroplether [ val <= "+(max-4*step)+"] { polygon-fill: #7FCDBB; } "
                + "#choroplether [ val <= "+(max-5*step)+"] { polygon-fill: #C7E9B4; } "
                + "#choroplether [ val <= "+(max-6*step)+"] { polygon-fill: #FFFFCC; } "
          subLayer.set({sql: sql, cartocss: style});
          console.log(style)
        })
        .error(function(err) {
          console.log(err);
        });
      }