D3 Examples - bar chart 4

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<!DOCTYPE html>
<meta charset="utf-8">
<style>
​
.title {
  font: 20px sans-serif;
  fill: black;
}
  
.bar {
  stroke: black;
}
​
.bar:hover {
  fill: green;
}
​
.axis {
  font: 10px sans-serif;
}
​
.axis path,
.axis line {
  fill: none;
  stroke: #000;
  shape-rendering: crispEdges;
}
​
.x.axis path {
  /*display: none;*/
}
​
  .d3-tip {
  line-height: 1;
  font-weight: bold;
  padding: 12px;
  background: rgba(0, 0, 0, 0.9);
  color: #fff;
  border-radius: 2px;
}
​
/* Creates a small triangle extender for the tooltip */
.d3-tip:after {
  box-sizing: border-box;
  display: inline;
  font-size: 10px;
  width: 100%;
  line-height: 1;
  color: rgba(0, 0, 0, 0.8);
  content: "\25BC";
  position: absolute;
  text-align: center;
}
​
/* Style northward tooltips differently */
.d3-tip.n:after {
  margin: -1px 0 0 0;
  top: 100%;
  left: 0;
}
</style>
<body>
<script src="https://d3js.org/d3.v3.min.js"></script>
<script src="https://labratrevenge.com/d3-tip/javascripts/d3.tip.v0.6.3.js"></script>
<script>
​
var margin = {top: 20, right: 20, bottom: 80, left: 40},
    width = 960 - margin.left - margin.right,
    height = 500 - margin.top - margin.bottom;
  
var padding = 0.01, outerPadding = 0.03,
    x = d3.scale.ordinal()
        .rangeRoundBands([0, width], padding, outerPadding);
​
//var x = d3.scale.ordinal()
//    .rangeRoundBands([0, width], .1);
​
var y = d3.scale.linear()
    .range([height, 0]);
​
var xAxis = d3.svg.axis()
    .scale(x)
    .orient("bottom");
​
var yAxis = d3.svg.axis()
    .scale(y)
    .orient("left");
    //.ticks(10, "%");
​
var tip = d3.tip()
  .attr('class', 'd3-tip')
  .offset([-10, 0])
  .html(function(d) {
    return "<strong>Function:</strong> <span style='color:yellow'>" + d.Function + "</span>";
  })  
  
var svg = d3.select("body").append("svg")
    .attr("width", width + margin.left + margin.right)
    .attr("height", height + margin.top + margin.bottom)
  .append("g")
    .attr("transform", "translate(" + margin.left + "," + margin.top + ")");
​
svg.call(tip);  
  
/*d3.csv("data.csv", type, function(error, data) {
  if (error) throw error;
    data = data.filter(function(row) {
        return row['TimePoint'] == '5';
    })
  x.domain(data.map(function(d) { return d.GeneNumber; }));
  y.domain([0, d3.max(data, function(d) { return d.Expression; })]);*/
​
d3.csv("data.csv", type, function (error, data) {
    data = data.filter(function(row) {
        return row['TimePoint'] == '30';
    });
        var a = alpha(data, v),   //scale factor between value and bar width
          mid = Midi(data, v, a),   //mid-point displacement of bar i
          w = Wi(data, v, a);         //width of bar i
​
        x.range(data.map(mid)); //force irregular intervals based on value
​
        x.domain(data.map(function (d) {
          return d.GeneNumber;
        }));
        //y.domain([0, d3.max(data, v)]);
            y.domain([0, d3.max(data, function(d) { return d.Expression; })]);
​
  svg.append("text")
    .attr("class", "title")
    .attr("text-anchor", "middle")
    .attr("x", width/2)
    .attr("y", 26)
    .attr("shape-rendering", "crispEdges")
    .text("Kampy Gene Number versus Expression");
​
  x_group = svg.append("g")
    .attr("class", "x axis")
    .attr("transform", "translate(0," + height + ")")
    .call(xAxis);
​
  x_group
    .selectAll("text")
    .attr("transform", function (d) {return "rotate(-60," + 0 + "," + 14 +  ")"});
  
  //x_group.selectAll(".tick").selectAll("text");
​
  svg.append("g")
    .attr("class", "axis")
    .append("text")
      .attr("font-size", 16)
    .attr("text-anchor", "end")
    .attr("x", width)
    .attr("y", height + margin.bottom/2)
    .attr("shape-rendering", "crispEdges")
    .text("Kampy Gene Number");
   
  svg.append("g")
    .attr("class", "y axis")
    .call(yAxis)
    .append("text")
    .attr("font-size", 16)
    .attr("transform", "rotate(-90)")
    .attr("y", 6)
    .attr("dy", ".71em")
    .style("text-anchor", "end")
    .text("Expression (RPKM)");
  
   svg.selectAll(".bar")
     .data(data)
     .enter().append("rect")
     .attr("class", "bar")
     .attr("x", function (d, i) {
            return x(d.GeneNumber) - a * (d.Stop-d.Start)/2;    //center the bar on the tick
        })
     //using x.range sets x.rangeBands to zero, compute width as a function of value
     .attr("width", x.rangeBand() || function (d) {
            return a * (+d.Stop - +d.Start);    //`a` already accounts for both types of padding
        })
     .attr("y", function (d) {
            return y(d.Expression);
        })
     .attr("height", function (d) {
            console.log(d.Expression);
            return height - y(d.Expression);
        })
     .attr("fill", function (d) {
      if (d.Orientation == 'direct') { return "blue"}
        else { return "orange"}
      })
    .on('mouseover', tip.show)
    .on('mouseout', tip.hide);
  
      function wrap(text, width) {
        text.each(function (d, i) {
          var text = d3.select(this),
            words = text.html(d).text().split(/\s+/).reverse(), //reset html to clear any tspans added before
            word,
            line = [],
            lineNumber = 0,
            lineHeight = 1.1, // ems
            y = text.attr("y"),
            dy = parseFloat(text.attr("dy")),
            tspan = text.text(null).append("tspan").attr("x", 0).attr("y", y).attr("dy", dy + "em"),
          //[edit]add dWidth
            dWidth = typeof width === "function" ? width(d, i) : width;
          while (word = words.pop()) {
            line.push(word);
            tspan.text(line.join(" "));
            if (tspan.node().getComputedTextLength() > dWidth/*[edit]*/) {
              line.pop();
              tspan.text(line.join(" "));
              line = [word];
              tspan = text.append("tspan").attr("x", 0).attr("y", y).attr("dy", ++lineNumber * lineHeight + dy + "em").text(word);
            }
          }
        });
      }
});
  
   /*function type(d) {
        d.value = +d.value;
        return d;
   }*/
   function v(d) {
        len = +d.Stop - +d.Start;
        return len;
   }
   function alpha(values, value) {
        var n = values.length, total = d3.sum(values, value);
      return (width - (n - 1) * padding * width / n - 2 * outerPadding * width / n) / total
   }
   function Wi(values, value, alpha) {
        return function (i) {
        return value(values[i]) * alpha
      }
   }
   function Midi(values, value, alpha) {
        var w = Wi(values, value, alpha), n = values.length;
      return function (_, i) {
        var op = outerPadding * width / n, p = padding * width / n;
        return op + d3.sum(values.slice(0, i), value) * alpha + i * p + w(i) / 2;
        }
   }
​
function type(d) {
  //d.value = +d.Expression;
  d.Expression = +d.Expression;
  return d;
}
​
</script>
    