code: def manipulate_shown_xdata(fx, fxname=1, **kwargs):
      
      def f(x,y): return fx(x), y
      f.__name__ = fx.__name__
      manipulate_shown_data(f, fxname=fxname, fyname=None, **kwargs)
docs: This defines a function f(xdata,ydata) returning fx(xdata), ydata and
      runs manipulate_shown_data() with **kwargs sent to this. See
      manipulate_shown_data() for more info.