On a Method of Investigating Periodicities in Disturbed Series, with Special Reference to Wolfer's Sunspot Numbers

@article{YuleOnAM,
  title={On a Method of Investigating Periodicities in Disturbed Series, with Special Reference to Wolfer's Sunspot Numbers},
  author={G. Yule},
  journal={Philosophical Transactions of the Royal Society A},
  volume={226},
  pages={267-298}
}
  • G. Yule
  • Mathematics
  • Philosophical Transactions of the Royal Society A
  • If we take a curve representing a simple harmonic function of the time, and superpose on the ordinates small random errors, the only effect is to make the graph somewhat irregular, leaving the suggestion of periodicity still quite clear to the eye. Fig. 1 ( a ) shows such a curve, the random errors having been determined by the throws of dice. If the errors are increased in magnitude, as in fig. 1 ( b ), the graph becomes more irregular, the suggestion of periodicity more obscure, and we have… CONTINUE READING
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