We Keep Coding

Mixed chart scatter plot with chart.js

I'm trying to create a scatter-plot chart in chart.js mixing a line chart and a bubble chart to graph the dispersion of some data vs the "ideal" of a predictive math model.
I'm using the scales to scatter the xAxes and make a straight line (which represents the "ideal"). The problem is in the bubble chart, the data of bubble can't be exactly over the line, is technically impossible (in theory), but they are exactly over the "ideal" line.
Here is my example code for the chart:
var chart = new Chart(ctx, {
type: 'bubble',
data: {
labels: makeLabels().labels,
datasets: [
{
type: 'line',
label: 'Data',
data: makeLabels().labels,
fill: false,
backgroundColor: "rgba(218,83,79, .7)",
borderColor: "rgba(218,83,79, .7)",
pointRadius: 0
},
{
type: 'bubble',
label: 'Data2',
data: makeBubbles(),
backgroundColor: "rgba(76,78,80, .7)",
borderColor: "transparent"
}
]
},
options: {
scales: {
xAxes: [{
type: 'linear',
position: 'bottom',
ticks: {
min: 0,
max: Math.max(...makeLabels().array)
}
}]
}
}
});
And here is the complete code with the dummie data and the playground in codepen.
Anyway, this is the actual result:
And this is the expected result:
The position of the line is irrelevant (the charts in the captures aren't plotted with the same data), but what i want is to cause the bubbles to disperse.
¿Any idea how to achieve it?

The reason your points are coming out linearly is because you are setting each data point's x and y value to be the same in makeBubbles(). This results in points that are positioned linearly.
To get the points to scatter just use point that don't fall into a linear pattern. To demonstrate what I mean, I have modified your makeBubbles() function so that your x and y values aren't equal. Now you get a very broad scatter.
arr = arr.map(function(item, i) {
return {x: item, y:arr[i - 1]}
});
Here is an example.

How to display several labels in Highchart.js?

I have basic Waterfall chart (HighChart.js) basic Waterfall chart image example
How display two labels on each column? Besides, first label must be at top of column and another label must be on bottom of column. So it should be exactly like on image.
Now I have two ideas:
First label is rendered on first chart, second value will be rendered on additional hidden chart (link to example: [http://jsfiddle.net/gk14kh3q/1/][3])
$(function () {
$('#container').highcharts({
chart: {
type: 'waterfall'
},
title: {
text: 'Highcharts Waterfall'
},
xAxis: {
type: 'category'
},
yAxis: {
title: {
text: 'USD'
}
},
legend: {
enabled: false
},
series: [{
dataLabels: {
enabled: true,
// here need align label
}
}, {
dataLabels: {
enabled: true,
// here need align label
}
}]
});
});
Combine two label in one by using formatting function and useHTML property. And after that set position to labels by using css or external js
May be some others practices exist? I'll be very pleased for help. Even discussion can be usefull. Thank you!
P.S. How I could insert icons to chart like on provided image?

You can use chart.renderer.label for adding new dataLabels for your column points. You can also use chart.renderer.image for adding arrows to your chart:
var addLabels = function(chart) {
$('.custom').remove();
var series = chart.series[0],
url;
Highcharts.each(series.data, function(p, i) {
if (i) {
chart.renderer.label(p.secondLabel, p.plotX + chart.plotLeft, p.yBottom + chart.plotTop).attr({
'text-anchor': 'middle'
}).addClass('custom').add();
if (p.y > 0) {
url = 'https://upload.wikimedia.org/wikipedia/commons/thumb/d/d1/Arrow_up.svg/1000px-Arrow_up.svg.png';
} else {
url = 'https://upload.wikimedia.org/wikipedia/en/f/f1/Down_Arrow_Icon.png'
}
chart.renderer.image(url, p.plotX + chart.plotLeft, chart.plotTop + chart.plotHeight - 15, 8, 13).addClass('custom').add()
}
});
};
Here you can find an example how it can work:
http://jsfiddle.net/zc2fb8vt/

Bar graph colors based on value in c3.js

I have the following bar chart in c3.js (here's a fiddle):
var chart = c3.generate({
data: {
x: 'Letter',
columns:
[
['Letter', 'A','B','C','D'],
['value', 25,50,75,100]
],
type: 'bar',
colors: {
value: '#FF0000'
},
},
axis: {
x: {
type: 'category'
}
},
legend: {
show: false
}
});
This sets all the bars to red. What I would like is the colors of the bars to be this gradient from FF0000 to 10FF00, which I believe is just in increments of adding 4096 to the decimal value of the color.
I'd like the gradient to start at 50 and end at 100 (that is, anything green and below would be solid red FF0000, and 100 would be green 10FF00).
I was trying to follow this example to set the color of a data point on a c3.js graph based on its value. In the example, the value of data3 is darkened as its value goes up. I've been trying to modify the color: function (color, d), but I can't seem to get it to do anything that I want it to.
Any help would be appreciated. Thanks!

I'm not sure what you did inside color: function, but it is the correct way to set it up. Regarding your desired gradient, it cannot be achieved by just increasing its hex value because going from yellow to green requires decreasing the value. The following example goes from red to yellow:
var chart = c3.generate({
data: {
x: 'Letter',
columns:
[
['Letter', 'A','B','C','D'],
['value', 25,50,75,100]
],
type: 'bar',
colors: {
value: function(d) {
return '#'+(0xff0000+(d.value-25)*256*3).toString(16);
}
},
},
axis: {
x: {
type: 'category
}
},
legend: {
show: false
}
});
fiddle

you can adding in your css like a
.c3-bar-0 {
fill:rgb(204, 0, 102)!important;
}
.c3-bar-1 {
fill:rgb(51, 153, 255)!important;
}
.c3-bar-2 {
fill: rgb(0, 255, 204)!important;
}

HighCharts - Add vertical lines from a desire point

Need to draw vertical lines from a desired point rather than starting from 0.
plotLines: [{
color: '#FF0000',
width: 1,
value: 4
}, {
color: '#FF0000',
width: 1,
value: 7
}],
Here is the fiddler link: http://jsfiddle.net/bpswt3tr/4/
My requirement is to draw first vertical line from when y value is 110.2 and 2nd line from when y value is 135.6 instead of starting from zero. i.e above the plot line only. Please suggest how can I achieve this? Thanks.

Considering the documentation it is unlikely that HighCharts supports this by default, as you are only allowed to associate a value of the current axis with the line.
You might need a preprocessing step that inverts you function to get the appropriate X values. Something like:
invert(data, Y) -> list of X values with data[X] = Y

You can do this on the chart.events.load call. If you know these are the points you want to add marker elements to then it is fairly straightforward. You first get the current max label value for the yAxis. Then you add a series to the chart with the starting point being your series' value and the second point being the max viewable yAxis value. Then do the same for the second point you want to add a bar to. Then, you need to re-set the yAxis max value to the initial state because highcharts will try to increase the scale to accommodate the new points.
chart: {
events: {
load: function () {
var yMAx = this.yAxis[0].max;
console.log(yMAx);
this.addSeries({
data: [{
x: 4,
y: 110.2,
marker: {
symbol: 'triangle'
}
}, {
x: 4,
y: yMAx,
marker: {
symbol: 'triangle-down'
}
}, ],
showInLegend: false,
color: 'red',
marker: {
enabled: true
}
});
this.addSeries({
data: [{
x: 7,
y: 135.6,
marker: {
symbol: 'triangle'
}
}, {
x: 7,
y: yMAx,
marker: {
symbol: 'triangle-down'
}
}, ],
showInLegend: false,
color: 'red',
marker: {
enabled: true
}
});
this.yAxis[0].update({
max: yMAx
});
}
}
}
Sample demo.

jqplot tooltip Content Editor

I m Facing Problem in Displaying tool tip for jq plot bar chart
My jqPlot Code Is
<script class="code" type="text/javascript">
$(document).ready(function(){
var s1 = [0,10,20,30,40,50,60,70,80,90,100];
var s2 = [-100,-90,-80,-70,-60,-50,-40,-30,-20,-10,-0];
var ticks = ['01-jun','02-jun','03s-jun','04-jun','05-jun','06-jun','07-jun','08-jun','09-jun','10-jun'];
var plot1 = $.jqplot('chart1', [s1, s2], {
animate: !$.jqplot.use_excanvas,
stackSeries: true,
seriesDefaults:{
renderer:$.jqplot.BarRenderer,
rendererOptions: {fillToZero: true, barPadding: 10,barMargin: 15},
pointLabels: { show: true }
},
series: [
{ color: '#68BA38',label:'Uptime' },
{ color: 'red',label:'Downtime' },
{ label:'abcd' }
],
legend: {
show: true,
placement: 'outsideGrid'
},
axes: {
// Use a category axis on the x axis and use our custom ticks.
xaxis: {
pad: 1,
renderer: $.jqplot.CategoryAxisRenderer,
ticks: ticks
},
// Pad the y axis just a little so bars can get close to, but
// not touch, the grid boundaries. 1.2 is the default padding.
yaxis: {
pad: 1,
min:-100,
max: 100,
}
},
highlighter:{
show:true,
tooltipContentEditor:tooltipContentEditor
},
});
});
function tooltipContentEditor(str, seriesIndex, pointIndex, plot) {
// display series_label, x-axis_tick, y-axis value
return plot.series[seriesIndex]["label"] + ", " + plot.data[seriesIndex][pointIndex];
}
</script>
Its Displaying Tooltip like this: uptime,20 or downtime,-20
i Want To display Tooltip contain my tick value like: 01-jun

Had exactly this question myself, so I used Firefox's Web Developer tools to examine the plot object in the tooltipContentEditor function to find where the x-axis labels are. It is in plot.options.axes.xaxis.ticks. So the code you want to get your data point's x-axis label is:
plot.options.axes.xaxis.ticks[pointIndex]
This is the x-axis label for the point index in question.
My complete code for the callback function I now use is:
function tooltipContentEditor(str, seriesIndex, pointIndex, plot) {
return plot.series[seriesIndex]["label"] + ": " + plot.options.axes.xaxis.ticks[pointIndex] + ", " + plot.data[seriesIndex][pointIndex];
}
This shows the series label, the x-axis tick label, then the data point value.

I think it might be something like
return ticks[pointIndex];