mayo/README.md

## README.md

      
    Raw
  

              README.md
            
          
    Playground gist for bl.ocks.org

  
## data.csv

          
            date
            value

            
              01/5/2014
              1

            
              02/5/2014
              2

            
              05/5/2014
              1

            
              06/5/2014
              2

            
              08/5/2014
              2

## index.html
<!DOCTYPE html>
<html>
  <head>
<meta charset="utf-8">

<script src="http://d3js.org/d3.v3.min.js"></script>
  <title>Scale test</title>
  <style>
  body {
    font-family: 'helvetica neue';
    font-size: .8em;
  }
  .line {
    fill: none;
    stroke: black;
    stroke-width: 1px;
  }

  .axis line,
  .axis path {
    stroke-width: 1px;
    stroke: black;
    fill: none;
  }

  .dots circle {
    fill: #555;
    fill-opacity: .5;
  }
  </style>
</head>
<body>
  <div id="chart"></div>
  <script>
var margin = {top: 20, right: 50, bottom: 50, left: 20},
    width = 960 - margin.left - margin.right,
    height = 502 - margin.top - margin.bottom;

  var parseDate = d3.time.format("%d/%m/%Y").parse;

  var dayCount = 0;

  var x = d3.time.scale()
      .range([0, width - margin.right]);

   var y = d3.scale.linear()
    .range([0, height - margin.left]);

  var dateFormat = d3.time.format('%a %b %d');

  var xAxis = d3.svg.axis()
    .scale(x)
    .orient("below");

  var yAxis = d3.svg.axis()
    .scale(y)
    .orient("right");

  var line = d3.svg.line()
    .x(function(d) { return x(d.date); })
    .y(function(d) { return y(d.value); });

  var svg = d3.select("#chart").append("svg")
    .attr("width", width + margin.left + margin.right)
    .attr("height", height + margin.top + margin.bottom);

  d3.csv("data.csv", type, function(error, data) {
    x.domain(d3.extent(data, function(d) { return d.date; }));
    y.domain(d3.extent(data, function(d) { return parseFloat(d.value); }))

    svg.append("path")
        .datum(data)
        .attr("class", "line")
        .attr("transform", "translate(" + margin.left + "," + margin.top + ")")
        .attr("d", line);

    svg.append("g")
        .attr("class", "x axis")
        .attr("transform", "translate(" + margin.left + "," + (margin.top + height + 20) + ")")
        .call(xAxis)
      .selectAll("text")
        .attr("dy", ".35em");

    svg.append("g")
        .attr("class", "y axis")
        .attr("transform", "translate(" + (width + 20) + "," + margin.top + ")")
        .call(yAxis)
      .selectAll("text")
        .attr("dy", ".35em");

    svg.append("g")
        .attr("class", "dots")
        .attr("transform", "translate(" + margin.left + "," + margin.top + ")")
      .selectAll("circle")
        .data(data)
        .enter()
        .append("circle")
        .attr("r", 5)
        .attr("cx", function(d) { return x(d.date); })
        .attr("cy", function(d) { return y(d.value); });;
  });

  function type(d) {
    d.date = parseDate(d.date);

    return d
  }
  </script>
</body>
</html>

## weekday.js
  weekday = (function() {

    cache = {};

    // Returns the weekday number for the given date relative to January 1, 1970.
    function weekday(date) {
      c = cache[date];
      if (c != null) {
        return c;
      }

      var weekdays = weekdayOfYear(date),
          year = date.getFullYear();
      while (--year >= 1970) weekdays += weekdaysInYear(year);

      cache[date] = weekdays;

      //if we're looking up a weekend day, make sure we cache the correct weekday
      if (cache[weekdays] == null) {

        newDate = new Date(date);
        offset = newDate.getDay() == 0 ? -2 : newDate.getDay() == 6 ? -1 : 0;

        if (offset > 0) {
          date.setDate(date.getDate() + offset);

          //cache the new date as well
          cache[newDate] = lookupWeekdays;
        }

        cache[lookupWeekdays] = newDate;
      }

      return weekdays;
    }

    //multiplier to go from weekday number to miliseconds (javascript timestamp)
    weekday.factor = 864e5;

    // Returns the date for the specified weekday number relative to January 1, 1970.
    weekday.invert = function(weekdays) {
      c = cache[weekdays];
      if (c != null) {
        return c;
      }

      var lookupWeekdays = weekdays;
      var year = 1970,
          yearWeekdays;

      // Compute the year.
      while ((yearWeekdays = weekdaysInYear(year)) <= weekdays) {
        ++year;
        weekdays -= yearWeekdays;
      }

      // Compute the date from the remaining weekdays.
      var days = weekdays % 5,
          day0 = ((new Date(year, 0, 1)).getDay() + 6) % 7;
      if (day0 + days > 4) days += 2;

      date = new Date(year, 0, (weekdays / 5 | 0) * 7 + days + 1);

      cache[date] = lookupWeekdays;
      cache[lookupWeekdays] = date;

      return date;
    };

    // Returns the number of weekdays in the specified year.
    function weekdaysInYear(year) {
      return weekdayOfYear(new Date(year, 11, 31)) + 1;
    }

    // Returns the weekday number for the given date relative to the start of the year.
    function weekdayOfYear(date) {
      var days = d3.time.dayOfYear(date),
          weeks = days / 7 | 0,
          day0 = (d3.time.year(date).getDay() + 6) % 7,
          day1 = day0 + days - weeks * 7;
      return Math.max(0, days - weeks * 2
          - (day0 <= 5 && day1 >= 5 || day0 <= 12 && day1 >= 12) // extra saturday
          - (day0 <= 6 && day1 >= 6 || day0 <= 13 && day1 >= 13)); // extra sunday
    }

  return weekday;

  })();
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8">

	<script src="http://d3js.org/d3.v3.min.js"></script>
	<title>Scale test</title>
	<style>
	body {
	font-family: 'helvetica neue';
	font-size: .8em;
	}
	.line {
	fill: none;
	stroke: black;
	stroke-width: 1px;
	}

	.axis line,
	.axis path {
	stroke-width: 1px;
	stroke: black;
	fill: none;
	}

	.dots circle {
	fill: #555;
	fill-opacity: .5;
	}
	</style>
	</head>
	<body>
	<div id="chart"></div>
	<script>
	var margin = {top: 20, right: 50, bottom: 50, left: 20},
	width = 960 - margin.left - margin.right,
	height = 502 - margin.top - margin.bottom;

	var parseDate = d3.time.format("%d/%m/%Y").parse;

	var dayCount = 0;

	var x = d3.time.scale()
	.range([0, width - margin.right]);

	var y = d3.scale.linear()
	.range([0, height - margin.left]);

	var dateFormat = d3.time.format('%a %b %d');

	var xAxis = d3.svg.axis()
	.scale(x)
	.orient("below");

	var yAxis = d3.svg.axis()
	.scale(y)
	.orient("right");

	var line = d3.svg.line()
	.x(function(d) { return x(d.date); })
	.y(function(d) { return y(d.value); });

	var svg = d3.select("#chart").append("svg")
	.attr("width", width + margin.left + margin.right)
	.attr("height", height + margin.top + margin.bottom);

	d3.csv("data.csv", type, function(error, data) {
	x.domain(d3.extent(data, function(d) { return d.date; }));
	y.domain(d3.extent(data, function(d) { return parseFloat(d.value); }))

	svg.append("path")
	.datum(data)
	.attr("class", "line")
	.attr("transform", "translate(" + margin.left + "," + margin.top + ")")
	.attr("d", line);

	svg.append("g")
	.attr("class", "x axis")
	.attr("transform", "translate(" + margin.left + "," + (margin.top + height + 20) + ")")
	.call(xAxis)
	.selectAll("text")
	.attr("dy", ".35em");

	svg.append("g")
	.attr("class", "y axis")
	.attr("transform", "translate(" + (width + 20) + "," + margin.top + ")")
	.call(yAxis)
	.selectAll("text")
	.attr("dy", ".35em");

	svg.append("g")
	.attr("class", "dots")
	.attr("transform", "translate(" + margin.left + "," + margin.top + ")")
	.selectAll("circle")
	.data(data)
	.enter()
	.append("circle")
	.attr("r", 5)
	.attr("cx", function(d) { return x(d.date); })
	.attr("cy", function(d) { return y(d.value); });;
	});

	function type(d) {
	d.date = parseDate(d.date);

	return d
	}
	</script>
	</body>
	</html>
	weekday = (function() {

	cache = {};

	// Returns the weekday number for the given date relative to January 1, 1970.
	function weekday(date) {
	c = cache[date];
	if (c != null) {
	return c;
	}

	var weekdays = weekdayOfYear(date),
	year = date.getFullYear();
	while (--year >= 1970) weekdays += weekdaysInYear(year);

	cache[date] = weekdays;

	//if we're looking up a weekend day, make sure we cache the correct weekday
	if (cache[weekdays] == null) {

	newDate = new Date(date);
	offset = newDate.getDay() == 0 ? -2 : newDate.getDay() == 6 ? -1 : 0;

	if (offset > 0) {
	date.setDate(date.getDate() + offset);

	//cache the new date as well
	cache[newDate] = lookupWeekdays;
	}

	cache[lookupWeekdays] = newDate;
	}

	return weekdays;
	}

	//multiplier to go from weekday number to miliseconds (javascript timestamp)
	weekday.factor = 864e5;

	// Returns the date for the specified weekday number relative to January 1, 1970.
	weekday.invert = function(weekdays) {
	c = cache[weekdays];
	if (c != null) {
	return c;
	}

	var lookupWeekdays = weekdays;
	var year = 1970,
	yearWeekdays;

	// Compute the year.
	while ((yearWeekdays = weekdaysInYear(year)) <= weekdays) {
	++year;
	weekdays -= yearWeekdays;
	}

	// Compute the date from the remaining weekdays.
	var days = weekdays % 5,
	day0 = ((new Date(year, 0, 1)).getDay() + 6) % 7;
	if (day0 + days > 4) days += 2;

	date = new Date(year, 0, (weekdays / 5 \| 0) * 7 + days + 1);

	cache[date] = lookupWeekdays;
	cache[lookupWeekdays] = date;

	return date;
	};

	// Returns the number of weekdays in the specified year.
	function weekdaysInYear(year) {
	return weekdayOfYear(new Date(year, 11, 31)) + 1;
	}

	// Returns the weekday number for the given date relative to the start of the year.
	function weekdayOfYear(date) {
	var days = d3.time.dayOfYear(date),
	weeks = days / 7 \| 0,
	day0 = (d3.time.year(date).getDay() + 6) % 7,
	day1 = day0 + days - weeks * 7;
	return Math.max(0, days - weeks * 2
	- (day0 <= 5 && day1 >= 5 \|\| day0 <= 12 && day1 >= 12) // extra saturday
	- (day0 <= 6 && day1 >= 6 \|\| day0 <= 13 && day1 >= 13)); // extra sunday
	}

	return weekday;

	})();