function renderWordCloud (dataset,dom_element_to_append_to,type, positiveColorScheme, negativeColorScheme){

        var margin = {top: 20, right: 20, bottom: 20, left: 20};

        var width = $(dom_element_to_append_to).width() - margin.left - margin.right,
            height = 400 - margin.top - margin.bottom;

        var maxValue = d3.max(dataset, function(d) { return d.size; });

        var scaleFontSize = d3.scale.linear().domain([ 0, maxValue ]).range([ 16, 48 ]);

        var color = d3.scale.linear()
                .domain([ 0, maxValue ])
                .range(type==1?positiveColorScheme:negativeColorScheme);

        d3.layout.cloud().size([width,height])
                .words(dataset)
                .rotate(0)
                .fontSize(function(d) { return d.size; })
                .on("end", draw)
                .start();

        function draw(words) {
            d3.select(dom_element_to_append_to).append("svg")
                    .attr("width", width)
                    .attr("height", height)
                    .attr("class", "wordcloud")
                    .append("g")
                    .attr("transform", "translate(" + (width/2 ) + "," + (height-margin.top)/2 + ")")
                    .attr("class", "gElement") //used to transform the words
                    .selectAll("text")
                    .data(words)
                    .enter().append("text")
                    .style("font-size", function(d) { return scaleFontSize(d.size) + "px"; })
                    .style("fill", function(d, i) { return color(i); })
                    .attr("transform", function(d) {
                        return "translate(" + [d.x, d.y] + ")rotate(" + d.rotate + ")";
                    })
                    .text(function(d) { return d.text; });


/*
            d3.select(dom_element_to_append_to + " svg g")
            .attr("transform","translate(" + (width/2 - $('.gElement')[0].getBoundingClientRect().width/2) + "," + (height*2/3 - $('.gElement')[0].getBoundingClientRect().height/2) + ")")
      */  }
}