Description Usage Arguments Value Author(s) Examples

Choose a function and inverse based on a text string

1 | ```
choose.trans(tr)
``` |

`tr` |
A character string, or a list of two functions, they should be each other's inverse. Names of the list are ignored. |

`choose.trans`

returns a named list with two elements "trans"
and "inv", both functions which are each other's inverse. This is intended
to be stored as an attribute `"Transform"`

with the resulting object
and used in plotting and reporting. All results will be on the transformed
scale. If the `tr`

argument to `choose.trans`

is a character
constant, the appropriate named list of two functions will be generated.
Possibilities are: "exp", "log", "logit", "pctlogit" (transforms percentages
by the logit), "sqrt", "sq" (square), "cll" (complementary log-minus-log),
"ll" (log-minus-log). If there is no match `NULL`

is returned, which
will correspond to no transformation.

Bendix Carstensen, Steno Diabetes Center, http://bendixcarstensen.com/.

1 | ```
choose.trans( "logit" )
``` |

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