Custom different grid lines and ticks style (like background color) in bar chart

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Giovanni

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Sep 16, 2017, 9:54:49 AM9/16/17
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Hi!

I need to draw a chart like this in this link: Chart
How can I do that?

Anyone can give me an example?

Because when I use the ticksValues function it give me an error: "Error: attribute transform: Expected number, "translate(NaN,0)" (for the x I use the scaleBand). And how can I customize the tick style? (like the background-color:red for the first, background-color:green for the second and black for the others)
Here is the initial code:

<!DOCTYPE html>
<meta charset="utf-8">
<style>

.bar {
  fill: steelblue;
    opacity: 0.5
}

.bar:hover {
  fill: brown;
}

.axis--x path {
  display: none;
}

.grid .tick {
    stroke: lightgrey;
    opacity: 0.7;
}
.grid path {
      stroke-width: 0;
}

</style>
<svg width="460" height="500"></svg>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script>

var svg = d3.select("svg"),
    margin = {top: 20, right: 20, bottom: 30, left: 40},
    width = +svg.attr("width") - margin.left - margin.right,
    height = +svg.attr("height") - margin.top - margin.bottom;

var x = d3.scaleBand().rangeRound([0, width]).padding(0),
    y = d3.scaleLinear().rangeRound([height, 0]);

var g = svg.append("g")
    .attr("transform", "translate(" + margin.left + "," + margin.top + ")");

// gridlines in x axis function
function make_x_gridlines() {       
    return d3.axisBottom(x)
        .ticks(5)
}

// gridlines in y axis function
function make_y_gridlines() {       
    return d3.axisLeft(y)
        .ticks(10)
}

d3.tsv("data.tsv", function(d) {
  d.frequency = +d.frequency;
  return d;
}, function(error, data) {
  if (error) throw error;

  x.domain(data.map(function(d) { return d.letter; }));
  y.domain([0, d3.max(data, function(d) { return d.frequency; })]);

     // add the X gridlines
  svg.append("g")           
      .attr("class", "grid")
      .attr("transform", "translate(-10," + (height + 20) + ")")
      .call(make_x_gridlines()
          .tickSize(-height)
          .tickFormat("")
      )

  // add the Y gridlines
  g.append("g")         
      .attr("class", "grid")
      .call(make_y_gridlines()
          .tickSize(-width)
          .tickFormat("")

      )

  g.append("g")
      .attr("class", "axis axis--x")
      .attr("transform", "translate(0," + height + ")")
      .call(d3.axisBottom(x)   
    )


  g.append("g")
      .attr("class", "axis axis--y")
      .call(d3.axisLeft(y).ticks(11))
    .append("text")
      .attr("transform", "rotate(-90)")
      .attr("y", 6)
      .attr("dy", "0.71em")
      .attr("text-anchor", "end")
      .text("Frequency");

  g.selectAll(".bar")
    .data(data)
    .enter().append("rect")
      .attr("class", "bar")
      .attr("x", function(d) { return x(d.letter); })
      .attr("y", function(d) { return y(d.frequency); })
      .attr("width", x.bandwidth())
      .attr("height", function(d) { return height - y(d.frequency); });


});

</script>
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