This is the chart I'm currently using: https://www.highcharts.com/demo/stock/stock-tools-gui
I wanted to know if its possible to get the coordinates of the line segment (in code) drawn using their inbuilt line tool.
Shapes added by using stock tools are stored as annotations and you can refer to them by:
chart.annotations[x].points;
Live demo: https://jsfiddle.net/BlackLabel/yf2c8oqk/
API Reference: https://api.highcharts.com/highcharts/annotations
Related
I need to show a graph in my iOS app something like
We have been using CorePlot for all the graphs and now I need to add a new kind as shown above. I found I could draw a graph like the above with CPTRangePlot. My problem is I can only draw a horizontal graph as shown below.
Is there any way to make it vertical? For a single curve we can easily do that by switching the value on X-axis and Y-axis. But for this kind of "range plot", I could not find a way to make it work for drawing the upper-bound and lower-bound lines and filling range with color can only be achieved on a normal horizontal graph. And yes, I can easily rotate the container view by 90 degrees, as I did in my testbed app. But I just cannot do this in our current app because this new added "range plot" graph is not the only one on the view. We have many other curves sharing the same plot space. So is there any hidden property or method to achieve the job? Thanks in advance!
I just added a fillDirection property to the range plot to enable this feature. You'll need to use the latest code from the release-2.3 branch.
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 am using core plot framework for drawing the line graph in iPhone and it is working fine.I am displaying system time on X- axis and Temperature on Y- axis.I need to draw the cross hair vertical line that indicate the selected value on the line graph. for example
I would highly appreciate if someone can give me some suggestion to solve this issue.
Thanks in advance.
You can use another axis or scatter plot to draw the line. Using an axis is simpler if all you need is a single horizontal or vertical line. Set all of the tick and grid line styles to nil and use the orthogonalCoordinateDecimal to position it in the correct location. There is a demo using a scatter plot to draw a crosshairs over the selected point in the Mac version of the CPTTestApp example app.
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.
I want to use core-plot for drawing line graph dynamically. data won't come at a time, we will be receiving point by point dynamically.
Is it possible to draw the chart dynamically using core-plot i.e drawing point by point as on when we receive the (x,y) point?
Please help me, Thanks.
Yes, you can do this reasonably easily. For each received data point, append it to an array of values to display. As these data points come in, call -reloadData on the Core Plot graph (or just the particular plot) to redraw the graph, passing in the array you just added a value to in response to the -numbersForPlot:field:recordIndexRange: delegate method.
If you need to adjust the plot range to track your data points (for a moving ticker), recalculate the new CPPlotRange for the X axis and set the plot space's xRange property to that.
Use the CPTestApp-iPhone, AAPLot, or StockPlot examples as templates for how to set up the line chart overall, and modify from that starting point.
I do something similar to this on the Mac in a scientific application:
(source: sunsetlakesoftware.com)
Sounds like you could make use of a demo project I put together and wrote about here (not core plot related though).
It draws a EKG graph but should easily be modified to use another input than the repeated "heart beat"...See line 320 in EAGLView.m where the indata is entered into the array.