The function set_limits() adjusts the limits according to the number
of relevant decimal places and according to the transformation requirement.
set_limits(
rl,
rl_sf,
sl,
sl_sf,
sf_option = "loose",
xform = c("no", "no"),
shift = c(0, 0),
ivl_side = "lower"
)A list with the following elements is returned:
A character string specifying the option concerning the significant figures.
A vector of two character strings specifying the transformation of the response and the time variable.
A vector of two values to be added to the values of the
transformed \(x\) and/or \(y\) variables (specified via the
xform parameter).
An optional element containing a numeric value or a numeric vector specifying the release limit(s) on the original scale.
An optional element containing a numeric value or a numeric vector specifying the significant figures of the release limit(s).
An optional element containing a numeric value or a numeric vector
of the adjusted (as specified by the sf.option parameter) release
limit(s).
An optional element containing a numeric value or a numeric
vector of the adjusted and transformed, if applicable (as specified by the
the sf.option parameter and the second element of the xform
parameter, respectively), release limit(s), otherwise the same as
rl.
A numeric value or a numeric vector of length 2
specifying the specification limit(s) on the original scale.
A numeric value or a numeric vector of length 2
specifying the significant figures of the specification limit(s).
A numeric value or a numeric vector of length 2 of the
adjusted (as specified by the sf.option parameter) specification
limit(s).
A numeric value or a numeric vector of length 2 of
the adjusted and transformed, if applicable (as specified by the the
sf.option parameter and the second element of the xform
parameter, respectively) specification limit(s), otherwise the same as
sl.
A numeric value or a numeric vector of length 2 specifying
the specification limit or limits. If a vector is provided it must be of
the form c(lower limit, upper limit).
A positive integer or a vector of positive integers specifying
the number of “significant figures” (sf) of sl. It must have
the same length as sl.
A character string specifying if the limits (rl
or sl) should be regarded as “tight” or “loose”, i.e.
either "tight" or "loose", respectively. The option
"tight" means that the limits are rounded to the specified number
of significant figures specified by the parameters rl_sf and
sl_sf. In case of the option "loose" the limits are rounded
to the specified number of significant figures (\(n\)), followed by the
subtraction of \(1\) from the \(n^{th}\) digit and addition of
\(5\) to the \((n + 1)^{th}\) digit if ivl_side is
"lower", or followed by the addition of \(4\) to the
\((n + 1)^{th}\) digit if ivl_side is "upper".
A vector of two character strings specifying the transformation
of the response and the time variable. The default is “no”
transformation, i.e. c("no", "no"), where the first element
specifies the transformation of the \(x\) variable and the second
element the transformation of the \(y\) variable. Valid alternatives
for \(x\) and/or \(y\) variable transformation are "log"
(natural logarithm), "sqrt" (square root) and "sq" (square).
A vector of two values which will be added to the variables
\(x\) and/or \(y\) before they are transformed as specified by the
xform parameter, where the first element will be added to the
\(x\) variable and the second element to the \(y\) variable. The
purpose is to prevent an undefined state which could arise when variables
with values of \(\leq 0\) are log or square root transformed. The
default is c(0, 0).
A character string specifying if the “upper” or the
“lower” limit is the relevant limit, i.e. either "upper" or
"lower", respectively. The default is "lower".
The function set_limits() adjusts the limits according to
rl_sf and sl_sf and, if necessary, transforms the limits
(rl and sl) as specified by the parameters xform and
shift.