For a rails web application I need a timeline with on the top (stacked) bar charts and on the bottom single events that should be recognizably different using e.g. forms (squares, rhombus, circles) and colors.
It's also important that I get some kind of picture back in order to reuse it to build a pdf.
At the moment I do the bar chart part with google charts, but I can't find a way to do the events. Those could also be on a separate chart that I then align in html or the pdf.
have you ever try the highcharts.
Here is an example of time series with events made with amCharts: http://www.amcharts.com/stock-chart/stock-events/
You can have any number of graphs stacked on each other, if this is what you want to do.
Disclaimer: I am the author of amCharts.
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I have designed a treemap using highcharts with custom algorithm.It has a drilldown to 1 level. There is a drop down for my chart and it has two options for selection. treemap is displayed on the basis of dropdown selection which has a group by feature implemented using underscore.js library. The feature is working fine. But the problem is, all the tiles which are grouped together, are placed next to each other. My requirement is : i want all those tiles to be packed in one big tile with one label. something like header title in D3(exactly the same). Please let me know how to go about it. Is it something like treemap within a treemap? Also i wanted to know if its feasible to have different labels and tooltips for parent and children in the same treemap. any leads would be helpful.
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I'm looking for a way to indicate key dates on a highchart with a label eg Public Holiday. I can't find a way to add labeled guidelines or add an opened callout to a point? Help appreciated.
In Highstock you have series type called flags which is a opened callout (similar to Dygraphs annotation). This is probably the closest fit to the indicators you referred. See this JSFiddle example of how it looks. Note how this example uses the Highstock source file, but builds a Highcharts chart. See this documentation for official information.
In Highcharts you can highlight points, labels and value in a wide variety of ways. First of you can add data labels to your points, which renders text next to it. Secondly you can use plot lines to highlight certain values along an axis. See this JSFiddle example of how both of these options can be used.
Of course there are lots of ways to improve and build upon this out of the box functionality, but that is up to your specific demands and desires.
Can one provide me a example for the Custom Legend Tool. I Want to Show Data in a tabular Format at the bottom of the chart. Can't use Data Table since it display the Value which are used for the drawing the chart. I want to provide some product related Data in tabular format.
This tool isn't still fully usable in TeeChart ActiveX as you can read here.
Feel free to add your mail to the CC list to be automatically notified when an update arrives.
In the meanwhile, the only solution I can think on would be using custom drawing techniques: manually drawing your texts and shapes at OnAfterDraw event.
Is there a way to make the Highcharts stacked bar graph work like a timeline? What I'd like to achieve is demonstrated in this Google Timeline Chart example.
Of key importance is that values can be repeated on the same bar. I haven't been able to figure this out, and currently suspect I may need to fall back to the Renderer and draw this chart manually, or switch to Google Charts, both of which I'd prefer to avoid. Thanks for any thoughts!
Yes, it is possible. This is called a gantt chart. That link has various examples. Some dont work. In that case update the jsFiddle's jquery and change the highcharts.js inclusion url.
I'm looking for a free iOS component that allows me to draw a doughnut chart with text in the center. So far I've only used Code Plot, but that is a full pie chart.
I'm attaching an example of the requirement.
Any help will be much appreciated.
I suggest searching on cocoacontrols.com. They have lots of open source controls for iOS and Mac. I didn't se any specifically called "doughnut chart" but some of the pie charts controls might offer that option.
In fact, it seems that this one does include what you're calling a doughnut chart. It doesn't look like it has built-in support for a label in the middle, but it does create a ring-shaped chart like you want.
You could also always create a pie chart and then put a view on top of it that is transparent except for a white circle in the middle, and then put a label on top of that.
Getting a little more complex you could modify the CorePlot control and add a filled CAShapeLayer to it.
Another option is to create svg chart and use UIWebView to display it. With svg chart, you get much more flexibility with libraries like highcharts and d3js. Here's an example with donut chart:
http://vida.io/documents/Byh8tTakzB59oGa9f
You can embed the link or save svg and display in UIWebView. Saving svg works offline.