Description Usage Arguments Value Examples

This function takes a series of 'x,y' coordinates and a specified 'y'
baseline value. For a given set of x-coordinates over time and repeated
measures of a 'y' variable, this function calculates the area of
resilience to a stress event (arse) that is formed below the specified
baseline value of 'y' using an implementation of the shoelace formula
(Gauss's area formula) for the area of irregular polygons. With arse
calculated, the arse is scaled in reference to the end state value
by multiplying the arse value by the division of baseline value over
the end state value (i.e., last measured value of 'y') or
*arse value * (baseline value/end state value)*. Smaller arse_s values
are indicative of better resilience on the measured variable.

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`data` |
A dataframe with x- and y-coordinates in wide format. |

`xcoord` |
A specified selection of the x-coordinate values within the dataframe. The first x-coordinate value should correspond to the baseline input of 'y'. |

`ycoord` |
A specified selection of the y-coordinate values within the dataframe. The first y-coordinate value should correspond to the baseline value of 'y'. The second y-coordinate value should be the first measure of 'y' after the intrusion of a stress event. The last value of 'y' should correspond to the last measurement of 'y' over the measured timeframe. |

`ybase` |
A specified selection of the baseline of the 'y' measured variable. Users are advised to place baseline as the first instance of the y-coordinate values. Function defaults to use the first y-coordinate value in the series. |

`yend` |
A specified selection of the end state of the 'y' measured variable. Users are advised to place end state as the last instance of the y-coordinate values. Function defaults to use the last y-coordinate value in the series. |

`yinvert` |
Specifies whether resilience occurs above or below the baseline depending on the meaning of high and low 'y' values. When parameter 'yinvert' is set to 'FALSE' (the default), it is assumed that higher numbers are indicative of positive (i.e., desired) 'y' values (e.g., exam grade). When 'yinvert' is set to 'TRUE', it is assumed that lower numbers are indicative of positive (i.e., desired) 'y' values (e.g., blood pressure). |

`saveout` |
When the parameter 'saveout' is set to 'FALSE' (the default), a vector of calculated arse_s values are given for each case. When 'saveout' is set to 'TRUE', a dataframe of the original inputted dataset is returned with a new column of calculated arse_s values. |

When the parameter 'saveout' is set to 'FALSE', a vector of calculated arse_s values are given for each case. When 'saveout' is set to 'TRUE', a dataframe of the original inputted dataset is returned with a new column of calculated arse_s values.

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