I'm trying to plot a line chart with dates along the x axis and time in minutes and seconds on the y axis.
The axis are all fine but when I try to plot the line graph it's not displaying as I expected.
I end up with lines along the axis.
Here is my js code.
/**
* Function for sorting times
*/
function numOrdA(a, b){ return (a[1]-b[1]); }
/**
* Array of timestamps and times in seconds
*/
var data = [
[1395237411, 130],
[1395950916, 90],
[1397557328, 95],
[1398353666, 87]
];
/**
* Sort the data by the time in seconds
*/
data.sort(numOrdA);
var width = 700,
height = 400,
padding = 100;
/**
* Create an svg container
*/
var vis = d3.select("body").
append("svg:svg")
.attr("width", width)
.attr("height", height);
/**
* Create min and max dates for x axis
*/
var mindate = new Date,
maxdate = new Date;
mindate.setTime(data[0][0] * 1000);
maxdate.setTime(data[data.length - 1][0] * 1000);
/**
* Create min and max times for y axis
*/
var mintime = new Date,
maxtime = new Date;
mintime.setTime(data[0][1] * 1000);
maxtime.setTime(data[data.length - 1][1] * 1000);
/**
* Create y scale using min and max times
*/
var yScale = d3.time.scale()
.domain([mintime, maxtime])
.range([height - padding, padding]);
/**
* Create x scale with min and max dates
*/
var xScale = d3.time.scale()
.domain([mindate, maxdate])
.range([padding, width - padding * 2]);
/**
* Create the y axis with time in minutes and seconds
*/
var yAxis = d3.svg.axis()
.orient("left")
.scale(yScale)
.tickFormat(d3.time.format("%M:%S"));
/**
* Create the x axis with a date format
*/
var xAxis = d3.svg.axis()
.orient("bottom")
.scale(xScale)
.tickFormat(d3.time.format("%a %x"));
/**
* Append y axis
*/
vis.append("g")
.attr("transform", "translate("+padding+",0)")
.call(yAxis);
/**
* Append the x axis
*/
vis.append("g")
.attr("class", "xaxis")
.attr("transform", "translate(0," + (height - padding) + ")")
.call(xAxis);
/**
* Rotate the text on the x axis
*/
vis.selectAll(".xaxis text")
.attr("transform", function(d) {
return "translate(" + this.getBBox().height*-2 + "," + this.getBBox().height + ")rotate(-45)";
});
/**
* Line function to plot the times (y axis) against dates (x axis)
*/
var line = d3.svg.line()
.x(function(d) {
return xScale(d[1]);
})
.y(function(d) {
return yScale(d[0]);
});
/**
* Add the path to the svg
*/
vis.append("svg:path").attr("d", line(data));
Here is the current code on jsfiddle
Thanks for any help