ynadir {arse}

Calculates the nadir point of measured 'y' values.

Description

This function takes a series of y-coordinates and returns the lowest value.

Usage

ynadir(data, ycoord, yinvert = FALSE, saveout = FALSE)

Arguments

data

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

ycoord

A specified selection of the y-coordinate values within the dataframe.

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 ynadir 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 ynadir values.

Value

When the parameter 'saveout' is set to 'FALSE', a vector of calculated ynadir 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 ynadir values.

Examples

yc <- t(c(75,53,37,25,27,35,50,75,75,75))
dataset1 <- data.frame(yc)
ynadir(data = dataset1, ycoord = yc, saveout = TRUE)