Using chart.js, I have a bar chart with datapoints spread across many years:
If you look closely near the x-axis, you can see some grey bars. Here's a line chart with the same data for reference:
While using a line chart for this example could make sense, it makes the charts with less data a bit awkward:
and with bars instead of lines
Is there an option that could be used on bar charts to improve the readability when large x-axis are involved? I am representing occurrences of events over-time, another adapted kind of chart could be acceptable too.
Thanks.
I am not sure there will be an option on chart.js.
One way to deal with it is to render line charts initially and then switch the type to 'bar' when zoomed into certain date ranges.
Depending on the type of data, you could also group up the data by summing (or averaging) the data by day (or week or month). Then pass it into the chart and the time series option should be able to display the x axis dates in a more sensible manner.
Otherwise you will have to look into more power charting libraries that can handle and manipulate bigger datasets like amCharts: https://www.amcharts.com/demos/stock-chart-candlesticks/
Or look into using D3 that is highly customisable, but a bit more complex to work with.
Related
I want to plot bars composed of a small but variable number of colored regions, with the same (three) colors appearing multiple times per bar. I'm aware of stacked bar charts in chart.js, but this uses the same number of colored regions (datasets) for each bar. Hacking it to plot a bunch of zero-length datasets to get the right number of colored regions in each bar feels wrong. That said, the tooltips, etc. in chart.js are nice, so if there's no more natural solution, maybe zero-length datasets are the way to go. Any thoughts?
So, instead of using chart.js, I think I'll use d3.js. Won't be hard to just plot the individual rectangles using d3.
For reference, an example that only has one bar per entry, but won't be hard to extend is the horizontal barplot shown here. (There's a simple intro to d3.js on the same site.)
I want to display the labels and datasets of pie & doughnut charts on their sides. I searched for many options on the internet including stackoverflow, but couldn't find a relative solution for my case. Maybe I missed something.
Now I have:
I need to display the chart data on its side like this: (For my pie and doughnut charts above)
First of all, I dont see any bar chart here. Second, what library are you using for making charts? If you couldn't find proper option to display label in that library, I can recommend you to use Amcharts, its more flexible. Let me know if you get your desired results
d3 is pretty cool and I just got started with it as a novice. There are several examples for histograms and I settled on this one. And I did a brief search for cumulative line chart, cumulative distribution, and cumulative frequency, all with respect to d3 but didn't find anything like what I was looking for, but the closest I came to was this, and in light of a better solution, I will try to pursue that and see if I can customize it for my needs. Ideally though, I'm looking for something akin to what Excel offers in terms of histogram with a cumulative frequency/distribution line overlaid on top (with its axis/label being the y-axis on the right). Is there such an equivalent capability with d3 (ideally available as an example/demo to work off of)? That way I have 1 chart rather than 2.
If no readily available examples/demo, any tips for extending my chosen histogram implementation with the cumulative frequency line on same chart with an axis label to the right? As I'm a novice, it will be hard/tricky for me to figure out on my own.
Would this example be close to what you are looking for? D3 has a histogram layout that does a lot of the computational legwork for you and can be plotted like any other bar graph. Just sum up the count data to create the CDF.
I am trying to make a dynamic graph something like as below:
Y-axis gives no. of users and x axis date range(For continuous graph )
x axis gives release of an algo on that date.(For discontinued graph)
I tried combined charts of highchart this and looked in google charts library.
Is there any way by how i can either directly generate a similar chart or merge two chart types in to one? Preferably using high charts or google graphs.
I guess we can merge two highcharts in to one but I am not very sure about it, also if we can Iam not sure how to do that.
Any help is appreciated.
Thanks
I am aware that you said "Preferably using high charts or google graphs", but I want to point out that this can be done very easily in C3.js using the "types" parameter to specify the graph type for each data item.
Demo: http://c3js.org/samples/chart_combination.html
I would suggest using plot bands to indicate release dates and types. You can dynamically add them using the addPlotBand() method (see http://api.highcharts.com/highcharts#Axis.addPlotBand). They would then overlay your "run of the mill" line chart showing number of users over time.
Assuming you have data that can distinguish between the release types, you could write code that adds a plot band of the desired color at the specific points on the x-axis.
I'd suggest making the plot bands have a from and to value thin enough (say, one interval or one date's worth) so it shows up as the thin stripes in your example.
You'd need to add a manual legend to show users what those colors mean, since plot bands wouldn't automatically show up in a Highcharts legend.
I hope this helps!
Looking through the documentation for Highstocks, I found this example:
Shown here is two series on the same chart, therefore with a linked range selector - this is really really useful, but I wish to display something different which is proving to be very difficult.
What I'm looking for is a normal line graph on the top series, representing data plotted onto time (almost like in this example), but a bar chart or horizontal candle chart in the lower graph, representing one or more timelines.
I've drawn an image of what I'm looking for:
I apologise for the crude drawing, but hopefully it shows what I am aiming to achieve: standard graph on top, bar/candle on bottom.
I have attempted various techniques to render this, but I can't find a way to have both series drawn on the same timescale, linked with the same range selector.
In case it helps, here's a starting point on JSFiddle, with all the unnecessary code removed: http://jsfiddle.net/g105b/8JhXv/
and a link to the original demo: http://jsfiddle.net/gh/get/jquery/1.7.2/highslide-software/highcharts.com/tree/master/samples/stock/demo/candlestick-and-volume/
Answer taken from official Highcharts forum
it is possible, but with some limitations. In the fact you want to show gantt chart. Bar charts aren't possible in your case - bar chart = inverted whole chart (yAxis becames xAxis, etc). Instead take a look at example for gantt chart: http://jsfiddle.net/highcharts/r6emu/
You can combine them into one, ane effect: http://jsfiddle.net/8JhXv/1/
About limits:
tooltip fo bottom chart is availabe only when you mouseover start and end date
bars are on lines, not between them