Hi Elaheh,
> Thank you for reply, The txt file is created for me but all of the numbers > in the txt file are "nan" . > not all of them, just scroll to the end of the file :-) the reason is here: def addPlotData(): if not isinstance(O.bodies[-1].shape,Wall): plot.addData(); return # plot.addPlotData() with no argument will add nan values ... use def addPlotData(): if not isinstance(O.bodies[-1].shape,Wall): return # just return without empty addPlotData call ... instead and it should work ok cheers Jan
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