Android Question Dynamically plot line graphs based on user input change.

[Meigionel TS]

Is there a way to plot line graphs in B4A dynamically? What I mean is, taking inputs of two editbox where the first edit box would represent x axis value and the second edit box would represent y axis value, and with a button event the graph replots with the new values. And when the app starts it would always be a blank graph with no plots. I wrote a program in python using matplotlib which allows us to do such things, but here I could not find any example of how to proceed with the problem.

 

[eurojam]

Hi welcome to the forum,
if you are familiar with matplotlib you can try to use ABExtDrawing Library, which is very powerfull,but it is not just a Chart-Library: https://www.b4x.com/android/forum/threads/abextdrawing-1-0.14638/
then there are serveral other chart possibilities:
google chart service (only online with internet connection): https://www.b4x.com/android/forum/threads/add-charts-with-google-charts-service.39197/
or
MPAndroidCharts: https://www.b4x.com/android/forum/t...-most-recent-library-files-in-post-322.58017/
or...

best
stefan

 

[Meigionel TS]

I get the part where we can plot a graph when the activity starts, but it is static, I cannot understand how to redraw or insert new data (x/y values) to the existing graph when someone adds new values in an editbox and clicks a button.

Do we have any example code from where I can take reference from?

 

[klaus]

When you have new data you need to clear the current graph and redraw it.
You may have a look at the B4A User's Guide, there you have a chapter treating this subject, link in my signature.
You could also have a look at the Oscilloscope project.

 

[Johan Schoeman]

https://www.b4x.com/android/forum/t...ta-passed-from-b4a-project.61521/#post-388909