Well, I did not found any documentation for the graph chart except the API documentation which is cryptic for me, so if any of the PHPspreadsheet saw this please consider document this class.
My question is how to draw a pie chart and implement it into an excel sheet, view it directly or save it to a file or all the previous if possible
Have you looked at the examples at all? In Samples/Charts, the 33_Chart_create_pie.php example is fairly clear, showing how to create a pie chart, with plenty of comments explaining what each line of code is doing
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I am using the iOS-charts library in (Swift 3) to plot my data into a scatter chart. I can do this part easily but now I am trying to get a non-linear best fit line to display too. Does the charts library have any easy functions for finding a best fit line, and if not how do I create a line from a function if a have to derive the best fit line function myself. I know how to create a line graph from data points but do not know if charts allows you to make one from a function. An example of what I'm trying to do is above. Any help is appreciated thanks.
Link to iOS-charts
http://www.appcoda.com/ios-charts-api-tutorial/
I got an situation like this. I would like to using line chart to draw stacked value. I have tried google search but i can't find the solution.
For example: On date May/23 i got 3 values, i would like to display these on line-chart.
How could i achieve this? Does highcharts support to do this one. Please take a look at the link attach to clearer the question
Stacked line chart image
Addition info: Im using highcharts to do this one
Thanks for any comment or answer
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I should use scatter-chart to achieve this one
Regarding the tooltip, I would suggest using a scatter series instead of a line. Set the lineWidth in the plotOptions and it will plot just like a line series, but the tool tips are handled differently. Example: jsfiddle.net/jlbriggs/c1o8Lwgv
I can do it in a area chart, but for the life of me it can't get it to work on a scatter plot. Is it at all possible? Google's tutorial is incredibly short and mysterious: https://support.google.com/docs/answer/2382813?hl=en
End of the first paragraph in your link:
They’re currently available for line and area charts only.
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.