D3.js scatterplot in CoffeeScript

gistfile1.coffee

dataset = []
w = 500
h = 400
padding = 30

dataset.push [ Math.random() * w, Math.random() * h ] for [0..50]

svg = d3.select("body")
        .append("svg")
        .attr("width", w)
        .attr("height", h)
            
circles = svg.selectAll("circle")
        		  .data(dataset)
        		  .enter()
        		  .append("circle")
        		  
xScale = d3.scale.linear()
                 .domain([0, d3.max(dataset, (d) -> d[0])])
                 .range([padding, w - padding * 2.5])

xAxis = d3.svg.axis()
              .scale(xScale)
              .orient("bottom")
              .ticks(5)

yScale = d3.scale.linear()
                .domain([0, d3.max(dataset, (d) -> d[1])])
                .range([h - padding, padding])

yAxis = d3.svg.axis()
              .scale(yScale)
              .orient("left")
              .ticks(5)

rScale = d3.scale.linear()
                 .domain([0, d3.max(dataset, (d) -> d[1] )])
                 .range([2, 8])
        		  
circles.attr("cx", (d) -> xScale d[0])
circles.attr("cy", (d) -> yScale d[1])
circles.attr("r", (d) -> rScale d[1])


svg.append("g")
  .attr("class", "axis")
  .attr("transform", "translate(0, #{h - padding})")
  .call(xAxis)

svg.append("g")
  .attr("class", "axis")
  .attr("transform", "translate(#{padding}, 0)")
  .call(yAxis)

The indentation for continued lines is haphazard. There's isn't really a standard style, but stick one and pick with it.

Many CoffeeScripters (jashkenas included) like to line up = for assignments, e.g.

dataset = []
w       = 500
h       = 400
padding = 30

Good point. Multi-lined method chains are not really something I've dealt with in the past and I am still making up my mind on how I think they should look/be aligned.

As for lining up =, that has always seemed like a good way to create extra work for myself for which I've never understood the appeal. Adding a new, long variable name means you have to go edit every line you already had aligned, and that seems like a huge waste of time.