Add placeholder view and visuals, add express and d3

1 files changed, 53 insertions, 0 deletions

diff --git a/public/graph.js b/public/graph.js
new file mode 100644
index 0000000..11ed599
--- /dev/null
+++ b/public/graph.js
@@ -0,0 +1,53 @@
+var n = 40,
+    random = d3.randomNormal(0, .2),
+    data = d3.range(n).map(random);
+var svg = d3.select("svg"),
+    margin = {top: 20, right: 20, bottom: 20, left: 40},
+    width = +svg.attr("width") - margin.left - margin.right,
+    height = +svg.attr("height") - margin.top - margin.bottom,
+    g = svg.append("g").attr("transform", "translate(" + margin.left + "," + margin.top + ")");
+var x = d3.scaleLinear()
+    .domain([0, n - 1])
+    .range([0, width]);
+var y = d3.scaleLinear()
+    .domain([-1, 1])
+    .range([height, 0]);
+var line = d3.line()
+    .x(function(d, i) { return x(i); })
+    .y(function(d, i) { return y(d); });
+g.append("defs").append("clipPath")
+    .attr("id", "clip")
+  .append("rect")
+    .attr("width", width)
+    .attr("height", height);
+g.append("g")
+    .attr("class", "axis axis--x")
+    .attr("transform", "translate(0," + y(0) + ")")
+    .call(d3.axisBottom(x));
+g.append("g")
+    .attr("class", "axis axis--y")
+    .call(d3.axisLeft(y));
+g.append("g")
+    .attr("clip-path", "url(#clip)")
+  .append("path")
+    .datum(data)
+    .attr("class", "line")
+  .transition()
+    .duration(500)
+    .ease(d3.easeLinear)
+    .on("start", tick);
+function tick() {
+  // Push a new data point onto the back.
+  data.push(random());
+  // Redraw the line.
+  d3.select(this)
+      .attr("d", line)
+      .attr("transform", null);
+  // Slide it to the left.
+  d3.active(this)
+      .attr("transform", "translate(" + x(-1) + ",0)")
+    .transition()
+      .on("start", tick);
+  // Pop the old data point off the front.
+  data.shift();
+}