convert_unit: Modify a vector or dataframe-columns by converting units.
In forestgeo/fgeo.misc: Miscellaneous Functions

Description Usage Arguments Value See Also Examples

convert_unit() of a vector or convert_unit_at() specific columns of a dataframe.

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convert_unit(x, from, to)

convert_unit_at(x, .at, from, to)

`x`	A vector or dataframe.
`from`	the unit in which the measurement was made.
`to`	the unit to which the measurement is to be converted.
`.at`	A character vector of names, positive numeric vector of positions to include, or a negative numeric vector of positions to exlude. Only those elements corresponding to `.at` will be modified. If the `tidyselect` package is installed, you can use `vars()` and the `tidyselect` helpers to select elements.

An object with the same structure as x (vector or dataframe).

measurements::conv_unit(), purrr::map_at().

Other general functions to perform common transforms: standardize_at

# For all units see ?measurements::conv_unit()
convert_unit(10, "mm2", "hectare")
convert_unit(1:3, from = "m", to = "mm")
convert_unit(1:3, "mph", "kph")

dfm <- data.frame(dbh = c(10, 100), name = c(10, 100))
convert_unit_at(dfm, .at = "dbh", from = "mm2", to = "hectare")
# All columns
convert_unit_at(dfm, .at = c("dbh", "name"), from = "mm2", to = "hectare")
# Same
convert_unit_at(dfm, .at = names(dfm), from = "mm2", to = "hectare")