Description Usage Arguments Value Note Author(s) References See Also Examples

Calculates vector of ratios of a numeric vector, i.e. ratio of `x[2]`

to `x[1]`

, ratio of `x[3]`

to `x[2]`

, and so forth.

1 | ```
ratios(x)
``` |

`x` |
Numeric vector. |

Numeric vector.

This function uses C++ code to achieve a 1.5-2 times speed increase compared to the base R code: `len <- length(prices); prices[2: len] / prices[1: (len - 1)]`

.

Dane R. Van Domelen

Acknowledgment: This material is based upon work supported by the National Science Foundation Graduate Research Fellowship under Grant No. DGE-0940903.

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