Description Objects from the Class Slots Methods Author(s) See Also Examples
Missing information imposing on the complete dataset
Objects can be created by miss
function.
cov
:Column indices of any normally distributed covariates used in the data set.
pmMCAR
:Decimal percent of missingness to introduce completely at random on all variables.
pmMAR
:Decimal percent of missingness to introduce using the listed covariates as predictors.
logit
:The script used for imposing missing values by logistic regression. See miss
for further details.
nforms
:The number of forms for planned missing data designs, not including the shared form.
itemGroups
:List of lists of item groupings for planned missing data forms. Without this, items will be divided into groups sequentially (e.g. 1-3,4-6,7-9,10-12)
twoMethod
:Vector of (percent missing, column index). Will put a given percent missing on that column in the matrix to simulate a two method planned missing data research design.
prAttr
:Probability (or vector of probabilities) of an entire case being removed due to attrition at a given time point. See imposeMissing
for further details.
m
:The number of imputations. The default is 0 such that the full information maximum likelihood is used.
package
:The package to be used in multiple imputation. The default value of this function is "default"
. For the default option, if m
is 0, the full information maximum likelihood is used. If m
is greater than 0, the mice
package is used.
convergentCutoff
:If the proportion of convergent results across imputations are greater than the specified value (the default is 80%), the analysis on the dataset is considered as convergent. Otherwise, the analysis is considered as nonconvergent. This attribute is applied for multiple imputation only.
timePoints
:Number of timepoints items were measured over. For longitudinal data, planned missing designs will be implemented within each timepoint.
ignoreCols
:The columns not imposed any missing values for any missing data patterns
threshold
:The threshold of covariates that divide between the area to impose missing and the area not to impose missing. The default threshold is the mean of the covariate.
covAsAux
:If TRUE
, the covariate listed in the object will be used as auxiliary variables when putting in the model object. If FALSE
, the covariate will be included in the analysis.
logical
:A matrix of logical values (TRUE/FALSE
). If a value in the dataset is corresponding to the TRUE
in the logical matrix, the value will be missing.
args
:A list of additional options to be passed to the multiple impuatation function in each package.
summary
To summarize the object
impose
To impose missing information into data
Patrick Miller (University of Notre Dame; pmille13@nd.edu) Alexander M. Schoemann (East Carolina University; schoemanna@ecu.edu) Kyle Lang (University of Kansas; kylelang@ku.edu) Sunthud Pornprasertmanit (psunthud@gmail.com)
imposeMissing
for directly imposing missingness into a dataset.
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Loading required package: lavaan
This is lavaan 0.6-3
lavaan is BETA software! Please report any bugs.
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This is simsem 0.5-14
simsem is BETA software! Please report any bugs.
simsem was first developed at the University of Kansas Center for
Research Methods and Data Analysis, under NSF Grant 1053160.
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Attaching package: 'simsem'
The following object is masked from 'package:lavaan':
inspect
MISSING OBJECT
The method of missing data handling: Maximum Likelihood
Covariates: none
Ignored Variables: none
Proportion of MCAR: 0.2
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