Highcharts - accessing overlaying data points - javascript

I have a scatter series with two points that have the same coordinates. Each point has different data associated with it (for example weight and height of different people - two different people can have exactly the same height and weight):
series: [ {
data: [{x:193.5, y:80.7, name:'danny'},
{x:193.7, y:90.7, name:'oren'},
{x:193.7, y:90.7, name:'josef'},
{x:195.5, y:80.3, name:'thomas'}]
}]
Full example at jsfiddle.
When viewing the tooltips of the chart, the tooltip of the second point shows:
Oren: 193.7,90.7
Making the data of josef inaccessible.
I would like to make the data of both josef and oren accessible, for example by putting them inside of the same tooltip.
Oren: 193.7,90.7
Josef: 193.7,90.7
How would you achieve this effect?
assume a very large data set - iteration over the entire series each time is not an option.

You could use the Tooltip formatter ( http://api.highcharts.com/highcharts#tooltip ) to manually format your tooltips.
In the formatter compare x and y value of all other points in the series(this.series) If the values are the same, add the name of these points to the tooltip.

Related

When having mulitple Y lines data, how can I let the chart automatically scale to show them all?

Suppose I have a linechart with multiple lines (the number is dynamic) and I would need to always scale the Y so that all lines are shown - so the scale should always be based on the range with highest values. Is there a way how to it automatically? I found some example with automatic yScaling using d3.max but that is done for a known dataset. In my case, I do not know what range will be the one to use.

Adding dynamic mean to time series chart

I will try to explain my problem as much accurate as possible. I am looking for a javascript chart library filling the two following conditions:
From an ajax request retrieving time series,
display dynamically data when changing the time window.
such as it is perfectly done on highstocks: http://www.highcharts.com/stock/demo/basic-line
And
plot an horizontal line corresponding to the mean,
changing when the user update the time window on the chart.
Actually it is possible to display an horizontal line. But they are fixed on the whole data and do not change accordingly when the time window is modified:
http://www.highcharts.com/stock/demo/yaxis-plotlines
I am quite new to the topic and would like to know if it'sp ossible to modify Highstock classes to have such a result. Or maybe some other js libraries exists?
Using a combination of the answer here:
Highchart, get total of visible series data after setExtremes
And an example of dynamic average using all visible series that I made for a previous question, here:
http://jsfiddle.net/jlbriggs/gweuLegq/
I put together this example, using the afterSetExtremes event, like this:
xAxis : {
events:{
afterSetExtremes:function() {
var ext = this.getExtremes();
getAverage(this.chart, ext.min, ext.max, show, width, avgColor, dashStyle);
}
}
},
Working example here:
http://jsfiddle.net/jlbriggs/c93543yL/
The idea is:
1) capture the afterSetExtremes event
2) get the resulting axis min and max
3) loop through the series data
4) if a point is between the min and max, increment the count, and add the
point's y value to the sum
5) calculate the average accordingly, check for existence of average series, if exists, update, if not, add
It could as easily use a plot line that you add/remove as needed instead of a series, but I like having it as a series so that it has a legend entry.

Strange tooltip behavior with long series in highcharts

I'm using Highcharts for a project in which I have to display two series with about a thousand points each. The x-axis represents a date, and the y-axis a quantity. In addition, each point has an associated list of namesMy data is day-by-day without gaps, with a structure such as
var mydata = [ ...
{x: theDate, y: theValue, names: theNames},
... ]
where theNames is an array of strings. I can access these in the tooltip formatter through this.points.point.names, given that the range displayed on the chart is small enough. If I change the x-axes so that the start date and end date are more than roughly a year apart, then the tooltip is not rendered at all.
One of the possible avenues that I have tried but failed with so far is setting the turboThreshold limit to the length of the longest series plus 1. Setting this lets me at least display a graph when mydata.length > 1000 (the default value). However, this only displays the tooltip if the x-axis range is less than 261. Otherwise, the tooltip disappears entirely, as does the point.data object where I'm getting the name from.
I'm also not great at JavaScript, but I was wondering if there were a way to separate the names of the points from the array containing them (in my examples, myData1 and myData2) and somehow access those names from the tooltip function without going through the current point.
Here is the link to the jsFiddle demonstrating this issue.
All help is appreciated!
The problem is in dataGrouping, when disabled works fine: http://jsfiddle.net/34tfg/1/
DataGrouping is method in Highcharts to approximate points and display them when width of the chart is not enough, e.g. how to display 10 000points in a chart of width 1 000px -> 10 points in a one pixel..? And when dataGrouping is used, new points are created, so all your custom options like 'names' etc. are lost (at least not accessible).
Code:
plotOptions: {
line: {
dataGrouping: {
enabled: false
},
turboThreshold: 10000
}
},

Can jqplot show different series' legends in different locations?

I have a graph (http://jsfiddle.net/CfVZP/12/) with several series where the y-axis data is on two different scales. I'm using the yaxis for one scale and the y2axis for the other. I'd like to be able to display the legend for the series using the yaxis on the left side of the graph (location: 'nw') and the legends for the series using the y2axis on the right side (location: 'ne'). Is there a way to set different legend properties for different series?
Something like:
{series: [
showMarker: true,
color: "#00FF00",
legend: { // This doesn't actually work.
location: 'ne', // I'm looking for a substitute
} // for this functionality.
],
// Additional series with different legend locations
}
It doesn't seem possible to do this using the standard legend options (I tried playing with the position and the EnhancedLegendRenderere column options), but I was wondering if there is a different plugin that might be able to make this happen, or some other option that can be altered to cause the same result.
I'm not sure if this is going to be possible. Looking at the jqplot source code, each plot holds only a single Legend object - for this to work you would most likely need it to hold an array of them.
Is there a particular reason you would like to do this? It would be a little unusual to have a plot with multiple legends. Would it not suffice to have a single legend but give each series a good, descriptive name?

Grouped and stacked multiBarChart with NVD3

Possible duplicate question to Bar chart in Javascript: stacked bars + grouped bars
I'm trying to create a stacked bar chart that lets you compare 2 values (dark and mid blue) to last week's data points (the secondary light blues 'behind').
Starting with multiBarChart() with .stacked(true) first I tried merging both weeks into a single array of 14 bars, where the x position could help group the bars. I tried to form my combined array of objects where .x properties' values are 0, 0.3, 1, 1.3, 2, 2.3, etc.
Unfortunately unlike lineChart() it doesn't use the x value for positioning.
Another idea is to exploit the group .stacked(false), providing 4 items (instead of 2) with the same x value. These then appear overlaid on top of each other instead of stacked.
Here the spacing looks good, but how do I stack these 2 by 2?
Hey I just developed grouped+stacked bar chart on d3.js. It is not NVD3 but it may help you.
Source
Demo
Let me just say up front that I am SO not an nvd3 expert. I'm barely past the getting-started stage myself.
That said, it looks like you're making this too hard on yourself.
I think you really want to send nvd3 two sets of data, with the x's matching between the two. (E.g., (1,y1a) corresponding to (1,y2a), then (2,y2a) with (2,y2b), etc.)
You can see this more clearly by the following:
Head to their Live Code page
Select the Group/Stacked Bar Chart.
Select the Data (JSON) tab.
Replace the first function with the following, and observe the resulting x values.:
function() {
return stream_layers(2,10,.1).map(function(data, i) {
alert( 'Stream '+i+': '+JSON.stringify(data));
return {
key: 'Stream' + i,
values: data
};
});
}
Best as I understand it, that's the model you're looking for.

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