d3js brushes
<script>
// Draw a circle
var myCircle = d3.select("#dataviz_brushing")
.append("svg")
.append("circle")
.attr("cx", 200)
.attr("cy", 200)
.attr("r", 40)
.attr("fill", "#69a3b2")
// Add brushing
d3.select("#dataviz_brushing")
.call( d3.brush() // Add the brush feature using the d3.brush function
.extent( [ [400,0], [400,400] ] ) // initialise the brush area: start at 0,0 and finishes at width,height: it means I select the whole graph area
)
</script>