# BOD

Documentation |
---|

## Biochemical Oxygen DemandThe ## UsageBOD ## FormatThis data frame contains the following columns: `Time` -
A numeric vector giving the time of the measurement (days). `demand` -
A numeric vector giving the biochemical oxygen demand (mg/l).
## SourceBates, D.M. and Watts, D.G. (1988), Originally from Marske (1967), ## Examplesrequire(stats) # simplest form of fitting a first-order model to these data fm1 <- nls(demand ~ A*(1-exp(-exp(lrc)*Time)), data = BOD, start = c(A = 20, lrc = log(.35))) coef(fm1) fm1 # using the plinear algorithm fm2 <- nls(demand ~ (1-exp(-exp(lrc)*Time)), data = BOD, start = c(lrc = log(.35)), algorithm = "plinear", trace = TRUE) # using a self-starting model fm3 <- nls(demand ~ SSasympOrig(Time, A, lrc), data = BOD) summary(fm3) |

Title | Authored on | Content type |
---|---|---|

OpenIntro Statistics Dataset - dream | August 9, 2020 - 12:25 PM | Dataset |

OpenIntro Statistics Dataset - winery_cars | August 9, 2020 - 2:38 PM | Dataset |

R Dataset / Package HSAUR / toothpaste | March 9, 2018 - 1:06 PM | Dataset |

R Dataset / Package HSAUR / pottery | March 9, 2018 - 1:06 PM | Dataset |

R Dataset / Package HistData / Guerry | March 9, 2018 - 1:06 PM | Dataset |

Attachment | Size |
---|---|

dataset-93773.csv | 53 bytes |