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In my application, I have been wanting to curve the lines connecting my datapoints using the GraphView library to give it a parabolic look. Currently, they are all sharp straight lines.

Is there any method in the GraphView library that allows curving the lines.

Or am I better off manually creating curved lines using Android SurfaceView and draw tools to overlay the GraphView?

All advice is appreciated, thanks.

CodeWizard
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redlime9
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1 Answers1

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I had a similar problem because my application plots quadratics, which as you know are curved. I ended up just creating a data set with data points that were very close to one another so the curve appeared to be curved even though it is just a sum of tiny little straight lines. Here is how you would generate that data set: 

            double f, x = -1000;
            double iterations = 1000000;
            for (int i = 0; i < iterations; i++) {
                x = x + 0.1;
                f = Math.pow(x,2);
                series.appendData(new DataPoint(x, f), true, 1000000);
            }
            graph.addSeries(series);

If you can find a better way I would like to know because this is quite memory intensive.

mitch
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  • Thanks for the answer, I was wondering where I would input the x and y coordinates into this. In my program, the plot is not created at a single moment rather is created in real time while calculations are still going on. How could I implement this in such a case? Thanks again – redlime9 Apr 23 '16 at 21:40