Opacidade da cor da escala D3
var color = d3.scaleLinear()
.domain([1,10])
.range(["rgba(0,0,0,0)","rgba(0,0,0,1)"]);
Horrible Hummingbird
var color = d3.scaleLinear()
.domain([1,10])
.range(["rgba(0,0,0,0)","rgba(0,0,0,1)"]);