Description Usage Arguments Details Value Examples

`calc_rate`

calculates the rate of change in oxygen concentration over time
in a data frame. You can perform single or multiple regressions on subsets of
the data frame by calling the `from`

and `to`

arguments.

1 |

`x` |
data frame or object of class |

`from` |
numeric vector. Defaults to NULL. Defines the lower bound(s) of
the data frame to subset. Subsetting is based on the argument: |

`to` |
numeric vector. Defaults to NULL. Defines the upper bound(s) of the
data frame to subset. Subsetting is based on the argument: |

`by` |
string. |

`plot` |
logical. Defaults to TRUE. Plot the results. |

There are no units involved in `calc_rate`

. This is a deliberate decision.
Units are called in a later function when volumetric and/or mass-specific
rates of oxygen use are computed in `convert_rate()`

and `convert_DO()`

.

A list object of class `calc_rate`

.

1 2 3 4 5 6 7 8 9 10 11 | ```
calc_rate(sardine.rd, from = 200, to = 1800) # default subset by 'time'
calc_rate(sardine.rd, 93, 92, by = 'o2') # subset by O2
calc_rate(sardine.rd, 1, 1000, by = 'row') # subset by row
x <- calc_rate(sardine.rd, .8, .2, by = 'proportion') # subset by proportion
x
summary(x)
plot(x)
# Using a vector in 'from' and 'to' perform multiple measurements:
data(intermittent.rd)
calc_rate(intermittent.rd, c(200,2300,4100), c(1800,3200,4600), by = 'time')
``` |

januarharianto/respR documentation built on Nov. 19, 2018, 8:17 p.m.

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