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Text File  |  1993-10-10  |  226b  |  8 lines
  1. #    This is demo for diff(f(x), x=x0)
  2.  
  3. diff(ln(x), x=0)        # derivative at x=0 is discont
  4. diff(ln(x), x=0+zero)        # right-sided derivative at x=0
  5. diff(ln(x), x=0-zero)        # left-sided derivative at x=0
  6. ln'(0+zero)
  7. ln'(0-zero)
  8.