I`m struggling with the esthetic aspect of my chart. Actually it lookes like this:
Chart is showing data over time in 10mins intervals. With that number of labels it`s hard to see what column matches to time.
I would like to create ticks like on the image, so the chart would be way more readable. I looked into documentatnion and tried this but without effect:
scales: {
xAxes: [
{
ticks: {
drawTicks: true,
},
},
],
Pasting the answer from the comment section,
best way to work with ticks is by using callback function eg:
ticks: {
callback: function (value: any, index: any, ticks: any) {
return 'What you want to return';
},
}
what is the best performing way to render a time cursor in an echarts graph?
The idea is to synchronize the vertical cursor shown on one graph with another graph on the same page. While the mouse moves over one graph a vertical line is drawn. Now I'd like to have a similar line being shown at the same time location on the other graph.
I'm currently do this by sending a message with a timestamp to the other graph and add a series to the config with a markline:
{
type: 'line',
animation: false,
markLine: {
symbol: 'none',
label: {
show: false
},
lineStyle: {
type: 'solid',
color: '#000',
opacity: 1
},
data: [
{ xAxis: 0 }
]
}
}
On receiving the timestamp, the graph updates data[0].xAxis and the chart is re-rendered. With many charts being connected, it still feels sluggish and I believe that the rendering of the graph with just changing the markline series is still too expensive.
There are a few merge options wrt. the config, but I can't find one, that updates just the markline series or better just moves a line.
I was also trying 'connect', but that was connecting too much (e.g. selection, tooltip, etc.) and even slower than my current method.
There might be another option to render the line with ZRender, but I have not gone that far yet.
Any suggestions?
Cheers,
klaus
I want to change the color of plot numeric values(1000, 2000...9000) as shown in below snapshot. I couldn't find an option to do so in highcharts api.
Whilst your comments are't that clear I believe you want the xAsis lines color changed:
xAxis: {
lineColor: '#FFFFFF'
}
Add the above to the highcharts object: graph.highcharts({});
See here for more details: http://api.highcharts.com/highcharts#xAxis
Edit
In that case you'll still want the xAsis. Thankfully highCharts let us do things as simply as CSS:
xAxis: {
labels: {
style: {
color: '#fff'
}
}
I'm wondering if it is possible to zoom in on a slice in a pie chart.
My chart is modeled after this example jsfiddle example
chart: {
renderTo: 'container',
type: 'area',
zoomType: 'x',
}
But it doesn't seem to work with pie charts. Am I missing something here?
Ideally, I would have a pie chart with 2 layers, where the outer layer serves as a child of the inner layer. When selecting a child slice, I could then have an entire pie chart showing that slice alone, along with its own children, etc.
Unfortunaltely zoom is not allowed for Pie Charts as its properties show you
x: to zoom in x-axis
y: to zoom in y-axis
xy: to zoom in both axes
but you can use size property with JavaScript to show zooming.
size property demo
I think I found what I was actually looking for. It isn't zoom, but rather the option of capturing click events on slices.
In order to do that, one must use the allowPointSelect attribute, which can be added to a pie chart like this (just one of several different ways):
plotOptions: {
pie: {
shadow: false,
allowPointSelect: true,
},
}
Then in order to capture clicks one has to declare the events attribute in the series being used:
series: [{
name: 'Example',
data: [
{
name: 'Firefox',
value: 45.0
},
{
name: 'IE',
value: 26.8
},
{
name: 'Chrome',
value: 12.8,
},
],
size: '100%',
point: {
events: {
click: function() {
// some code to execute when clicking a slice
alert('Slice name: ' + this.name + ' and value: ' + this.value);
}
}
}
}]
Then in that click function, any javascript code can be executed, and the declared fields in the data can also be accessed. So a second pie chart could theoretically be created on the fly.
I'm looking for a way to create what come to know to be called a "bubble chart" for a website I'm building. It needs to be compatible with IE7 and above, and of course all the good browsers like Firefox, Chrome and Safari. And no flash since this thing will need to run on iOS.
The chart needs to look like this, http://www.flickr.com/photos/jgrahamthomas/5591441300/
I've browse online and tried a few things, including:
Google Scatter Charts. This doesn't work as it seems Google Charts limits the size of a point to something smaller than I need. And Venn Diagrams are limited to three circles.
Protovis Dots. Great library, but isn't compatible with IE8.
Raphael Javascript. This one might be my best bet, but there's no explicit support for bubble charts.
Thanks for your help.
It looks like Raphael javascript is the way to go. It's compatible with IE6. I found a great tutorial at http://net.tutsplus.com/tutorials/javascript-ajax/an-introduction-to-the-raphael-js-library/ and am able to get the example working on my rails site with this code:
# window.onload = function() {
# var paper = new Raphael(document.getElementById('canvas_container'), 500, 500);
# var circle = paper.circle(100, 100, 80);
# for(var i = 0; i < 5; i+=1) {
# var multiplier = i*5;
# paper.circle(250 + (2*multiplier), 100 + multiplier, 50 - multiplier)
# }
# var rectangle = paper.rect(200, 200, 250, 100);
# var ellipse = paper.ellipse(200, 400, 100, 50);
# }
You can give Protovis a chance, the library looks good for your needs: http://vis.stanford.edu/protovis/ex/
Another charting library is Highcharts, but I haven't tried it yet: http://www.highcharts.com/
Have you had a look at flot?
It's a plotting library for jQuery. While it technically doesn't have any "native" support for bubble charts it is possible to create bubble charts with it by using a few tricks, the simplest one probably being to simply put each point in its own data series (thus allowing you to control the radius of each individual point.
By defining your points similar to this you'll be able to create a bubble chart:
var dataSet = [{
color:"rgba(0,0,0,0)", // Set the color so it's transparent
shadowSize:0, // No drop shadow effect
data: [[0,1],], // Coordinates of the point, normally you'd have several
// points listed here...
points: {
show:true,
fill:true,
radius: 2, // Here we set the radius of the point (or rather, all points
// in the data series which in this case is just one)
fillColor: "rgba(255,140,0,1)", // Bright orange :D
}
},
/* Insert more points here */
];
There is a bubble chart available for flot here
Note that you need to scale your bubbles size yourself if you don't want them to coverup the graph. Documentation is here.
To use it, add the following at the beggining of your html page:
and call it from a json result or any data object like in this sample:
$.getJSON('myQuery.py?'+params, function(oJson) {
// ... Some validation here to see if the query worked well ...
$.plot('#myContainer',
// ---------- Series ----------
[{
label: 'Line Sample',
data: oJson.lineData,
color: 'rgba(192, 16, 16, .2)',
lines: { show: true },
points: { show: false }
},{
label: 'Bubble Sample',
data: oJson.bubbleData, // arrays of [x,y,size]
color: 'rgba(80, 224, 80, .5)',
lines: { show: false },
points: { show: false },
},{
label: 'Points sample',
data: oJson.pointsData,
color: 'rgba(255, 255, 0, 1)',
lines: { show: false },
points: { show: true, fillColor: 'rgba(255, 255, 0, .8)' }
},{
...other series
}],
// ---------- Options ----------
{ legend: {
show: true,
labelBoxBorderColor: 'rgba(32, 32, 32, .2)',
noColumns: 6,
position: "se",
backgroundColor: 'rgba(224, 224, 224, .2)',
backgroundOpacity: .2,
sorted: false
},
series: {
bubbles: { active: true, show: true, fill: true, linewidth: 2 }
},
grid: { hoverable: true, clickable: true } },
xaxis: { tickLength: 0 }
}); // End of plot call
// ...
}); // End of getJSON call
I tried to do the same thing with jqPlot which has some advantages but doesn't work with bubbles and other kind of series on the same graph. Also Flot does a better job to synchronise common axis scale with many series. Highchart does a really good job here (mixing bubble chart with other kind of series) but isn't free for us (government context).