d2rsq.2: New implmentation of 'd2rsq'
In JamesCuster/pjam:

Adds parameter checks and expands features

1 2	d2rsq.2(d, p = NULL, var.names = NULL, expand = FALSE, return.df = FALSE)

`d`	Either a `data.frame` which contains columns corresponding to Cohen's d and the proportion, or a numeric vector of Cohen's d values.
`p`	Numeric vector of proportions. The defualt value, `NULL`, should be used if `d` is a `data.frame`.
`var.names`	Ordered character vector with column names of columns corresponding to Cohen's d and the proportion. The name of the column corresponding to Cohen's d must come first `var.names` only needs to be specified if the columne names in the `data.frame` differ from "d" and "p".
`expand`	logical. If `TRUE` `expand.grid` is used to create all combinations of the provided Cohen's d values and proportions.
`return.df`	logical. If `FALSE` the function returns a vector of R squared values. If `TRUE` the function returns a `data.frame` containing all Cohen's d values and proportions with corresponding R squared values.