I'm creating a chart that has a range [2010 January, 2014 December]. I might have data for each month in between (if no data, it's null) and my idea was to use the grouped-categories plugin in order to create a x axis that shows every month (not the label itself) and group the months in years.
I achieved it using the grouped-categories plugin. I'm using primefaces that calls a Javascript function to display the JSON content as a chart.
[a link] http://jsfiddle.net/TFhd7/161/
The main issue is that in the x-axis I'd like to make it like a ruler:
- decrease the x-axis height (the thicks size)
I tried tickLength but it doesn't work for grouped-categories chart. Any ideas?
Related
Is it possible to remove certain days in highcharts? I have a chart that only get data intervals from Monday to Friday. The problem Is that Saturday and Sunday is auto added to the graph even when there is no data for these days. I cant find anything that helps on api.highcharts.com they usually have solutions to all graph related problems but I cant seem to find anything about my problem. It's probably some easy option in the chart but I cant find anything that works.
You have two options, use highcharts and breaks.
An array defining breaks in the axis, the sections defined will be left out and all the points shifted closer to each other.
Requires that the broken-axis.js module is loaded.
It would look something like this, in a datetime axis:
xAxis: {
tickInterval: 1,
breaks: [{
from: 1537567200000,
to: 1537740000000,
breakSize: 1
}]
}
Working example: http://jsfiddle.net/ewolden/L3ykegzq/
Or switch to highstock where you can have an ordinal axis (ordinal is used by default):
In an ordinal axis, the points are equally spaced in the chart regardless of the actual time or x distance between them. This means that missing data periods (e.g. nights or weekends for a stock chart) will not take up space in the chart. Having ordinal: false will show any gaps created by the gapSize setting proportionate to their duration.
Working example: http://jsfiddle.net/gh/get/library/pure/highcharts/highcharts/tree/master/samples/stock/xaxis/ordinal-true/
I've got a chart that uses time data for both the X and Y axis. I'm able to get both axes to convert my millisecond data into HH:MM:SS. How do I get Y axis tooltip to display HH:MM:SS too? API suggests it's possible, however I'm unable to replicate.
tooltipValueFormat: String
Parallel coordinates only. Format that will be used for point.y and available in tooltip.pointFormat as point.formattedValue If not set, point.formattedValue will use other options, in this order:
yAxis.labels.format will be used if set
if yAxis is a category, then category name will be displayed
if yAxis is a datetime, then value will use the same format as yAxis labels
https://api.highcharts.com/highstock/yAxis.tooltipValueFormat
See my fiddle for example
https://jsfiddle.net/gramlich/jpnsujo8/1/
Not to further complicate things- I am doing this in a Django View, and passing the chart options via JSON to minimize my need for JS. If possible, I'd like to use a solution using only objects found in the Highcharts API; rather than resorting to writing my own Formatter function in JS.
Thank you for your help!
You can use pointFormat passing the formatting string like:
tooltip: {
pointFormat: '{point.y:%M:%S}'
}
Here's a working fiddle: https://jsfiddle.net/w4f9suzb/
So I had some issues with previous versions of Chartjs (namely 2.5) when I was working with a combo chart (bar + line) and had difficulties with time-series data.
For context, I'm using financial data (stock price and volume). Since the market is only open 5 days a week, there is a "gap" in the data. I don't worry too much about this gap, but when using Chartjs's re-written functionality for time-series data, the width of the bars becomes irregular. Here's an example:
You can see that each "Friday" and "Monday" of data, the bars get larger to compensate for the gap. The xAxes code that creates this is:
type: 'time',
time: {
unit: 'day',
distribution: 'linear'
}
....
Now if I remove the type: time distinction, I get the standard bars, but the labels are pulling straight from my data, rather than being parsed as dates and correctly managed by Moment.js:
....
To sum it up: how can I get regular-spaced bars when my data is not regularly linear while utilizing Chartjs's time-series axises?
This was addressed in a bug fix and merged as a part of the v2.8 release of Chartjs (see here).
I am currently working with NVD3 using Angular Directive (angular-nvd3). I have a very simple line chart with very simple data.
The problem I have encountered now is that my data is wrongly aligned with the Axis. Example plunker available here: http://plnkr.co/edit/jWEYt6?p=preview ,
I am using dates on my xAxis, which are parsed using d3 library:
tickFormat: function(d) {return d3.time.format('%d/%m')(new Date(d))}
Description:
I would expect the xAxis labels to be correspondent to the grid.
In the example you can clearly notice that the xAxis is not evenly devided (values: 06/11, 08/11, 11/11, 13/11). So usually 2 days and sometimes 3 days :)
What is worse - the peaks are not matching the grid. Example: 06/11 tick is really not even close to the grid's line where I guess it is supposed to be.
I have also tried this on master's code from repo and it happens there too. There is a link in the HTML head section.
Is there a problem with my data, proper date formatting or something else? Thanks!
This bugged me for a while and I could not find an answer here. I even have opened a bug on GitHub: https://github.com/novus/nvd3/issues/1382#issuecomment-160694559 and I was clued in on the answer.
The problem:
The actual issue is hidden because of d3.time.format('%d/%m'). My example data is given in one tick per day manner, and the format was set accordingly. But d3 does not understand that. When drawing the grid it divides the max-min/someValue and the grid ticks does not have to occur on full day (midnight), but on any hour. And because of the formatting I could not see that.
The version showing this misconception is here: http://plnkr.co/edit/2iMHOp?p=preview
Solution:
So now, when I know what I could do, I managed to substitute the ticks by using tickValues parameter in nvd3 / angular wrapper.
The version with the solution is here:
http://plnkr.co/edit/23n3ll?p=preview
Yet another bug :)
Funny thing is that since the labels are too long to be displayed, I had to rotate them so they could fit. Another bug occurs here (I think). As you can see 2nd and last but one tick label is missing. First I tried using the solution mentioned here: NVD3 Line Chart X Axis Ticks Are Missing using the showMaxMin parameter but it does not work correctly. But if you rotate the labels to ~ -70 degrees the labels are displayed OK.
I guess this is not the end with my NVD3 journey ;)
Since the problem is, according to Atais:
The actual issue is hidden because of d3.time.format('%d/%m'). My example data is given in one tick per day manner, and the format was set accordingly. But d3 does not understand that. When drawing the grid it divides the max-min/someValue and the grid ticks does not have to occur on full day (midnight), but on any hour. And because of the formatting I could not see that.
I managed to pass the x's values as integer values (ex: 20160211) instead of formatted dates (ex: 2016-02-11 or similars) to nvd3, and then on tickFormatformat them to display properly.
I wrote another plunker with the problem and the commented solution (used momentjs):
Plunker with the simulated error: http://plnkr.co/edit/fXDQ0f?p=preview
Data is provided in format x: milliseconds, y: int, like {x: 1446418800000, y: 20}, and it is being formated with tickFormat:
xAxis: {
tickFormat: function(d) {
return moment(d).format('YYYY-MM-DD');
}
}
Plunker with the solution: http://plnkr.co/edit/KpALzo?p=preview
Data is provided in format x: int, y: int, like {x: 20160211, y: 20}, and it is being formated with tickFormat:
xAxis: {
tickFormat: function(d) {
moment(d, 'YYYYMMDD').format('YYYY-MM-DD');
}
}
Note that you can do it with time too, just by appending to the 'numeric date'.
As stated from #ajaybc, will not work well with dates from different months, since d3 will interpolate X axis with invalid filling dates (days 32, 33, 34 and so on)
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.