Description Usage Arguments Details Value Note Author(s) References See Also Examples
Create a table of downweighted observations based on a rrfit object within a cgPairedDifferenceFit object. A cgPairedDifferenceDownweightedTable class object is created.
1 2 | ## S4 method for signature 'cgPairedDifferenceFit'
downweightedTable(fit, cutoffwt, display = "print",...)
|
fit |
A fit object of class |
cutoffwt |
It has no default and must be specified as a numeric between 0 and 1
exclusive. It is a threshold. All
observations that fall beneath the threshold will be
identified. For example, a |
display |
One of three valid values:
|
... |
Additional arguments. None are currently defined for this method. |
If no observations meet the cutoff criteria, a text message of the
cgPairedDifferenceDownweightedTable
content emptiness is output
instead.
The reported weights are in the scale of the observation, not the
sum of squared errors representation for the likelihood. Thus they are
derived from the square root of the $w
component from
a MASS::rlm
fit object.
An object of class cgPairedDifferenceDownweightedTable
, with the
following slots:
contents
A data frame where each row is an observation from the fitted data set that meets the cutoff criteria, and these columns:
expunit
The experimental unit name identified from the fitted data.
grp1
The observed response value from group 1.
grp2
The observed response value from group 2.
weight
The weight associated to the observation from the resistant / robust fit.
pct down-weighted
An expression of the weight in terms of percent reduction from the maximum of 1.
Simple Diff
The difference of observed response value between the two groups.
Ratio Diff
The percent difference of observed response value
between the two groups. NOTE this only occurs when
logscale=TRUE
from the
cgPairedDifferenceFit
object settings
in the fit
argument.
Pct Diff
The percent difference of observed response value
between the two groups. NOTE this only occurs when
logscale=TRUE
from the
cgPairedDifferenceFit
object settings
in the fit
argument.
If no observations meet the cutoff criteria,
the contents
slot is set to NULL
.
messages
A message when the contents
slot is set to NULL
.
settings
A list of settings carried from the
cgPairedDifferenceFit
object. These are used for the
print.cgPairedDifferenceDownweightedTable
method,
invoked for example when display="print"
.
Contact cg@billpikounis.net for bug reports, questions, concerns, and comments.
Bill Pikounis [aut, cre, cph], John Oleynick [aut], Eva Ye [ctb]
Venables, W. N. and Ripley, B. D. (2002), Modern Applied Statistics with S. Fourth edition. Springer.
cgPairedDifferenceFit
, MASS::rlm
1 2 3 4 5 6 7 8 9 10 11 12 13 14 | data(anorexiaFT)
anorexiaFT.data <- prepareCGPairedDifferenceData(anorexiaFT, format="groupcolumns",
analysisname="Anorexia FT",
endptname="Weight",
endptunits="lbs",
expunitname="Patient",
digits=1,
logscale=TRUE)
anorexiaFT.fit <- fit(anorexiaFT.data)
downweightedTable(anorexiaFT.fit, cutoffwt=0.25) ## No observation
downweightedTable(anorexiaFT.fit, cutoffwt=0.75) ## downweighted at least 25%
|
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