calc.max.in.range: Calculate the x and y values in a model where y is maximum
In ctriandafillou/cat.extras:

This function is designed to evaluate a polynomial model (either calculating it from scratch using general.poly.fit or with a dataframe that already contains the output of general.poly.fit) between two variables, specified by the user, and then returns the (x,y) value where y is maximal in a given range. Since the model is a polynomial function, there should only ever be one max y.

1 2	calc.max.in.range(df, poly.degree = 2, compute.model = F, y.col = NULL, x.col = NULL, x.min = 30, x.max = 200)

`df`	dataframe or dataframe group
`poly.degree`	degree of the polynomial model; default is 2. Only 2 and 3 are currently available.
`compute.model`	logical; whether or not to fit the underlying model. Default is F. If T, x.col and y.col must be specified.
`y.col`	y column to fit in the model; required if compute.model = T
`x.col`	x column to fit in the model; required if compute.model = T
`x.min`	Minimum value of the range over which the maximum is to be computed
`x.max`	Maximum value of the range over which the maximum is to be computed

Returns a one-row dataframe with all grouping variables and the (x,y) values corresponding to the value at which y is maximal in the range (xmin, xmax).

ctriandafillou/cat.extras documentation built on Aug. 27, 2020, 11:04 p.m.