readModels: Read Parameters, Summary Statistics, and Savedata from Mplus...

In MplusAutomation: An R Package for Facilitating Large-Scale Latent Variable Analyses in Mplus

Read Parameters, Summary Statistics, and Savedata from Mplus Output

Description

Extracts information from one or more Mplus output files, including fit statistics and parameters. Its is to parse all (supported) aspects of Mplus output and to combine these into a list object, with one element per output file identified.

Usage

readModels(
  target = getwd(),
  recursive = FALSE,
  filefilter,
  pathfilter,
  what = "all",
  quiet = TRUE
)

Arguments

target	the directory containing Mplus output files (.out) to parse OR the single output file to be parsed. May be a full path, relative path, or a filename within the working directory. Defaults to the current working directory. Example: "C:/Users/Michael/Mplus Runs"
recursive	optional. If TRUE, parse all models nested in subdirectories within target. Defaults to FALSE.
filefilter	a Perl regular expression (PCRE-compatible) specifying particular output files to be parsed within directory based on their file name. See regex or https://www.pcre.org/pcre.txt for details about regular expression syntax.
pathfilter	a Perl regular expression (PCRE-compatible) specifying particular paths to be parsed within directory based on their absolute paths.
what	a character vector denoting what aspects of Mplus output to extract. Defaults to "all", which will extract all supported output sections. See details for additional information.
quiet	whether to suppress printing to the screen the file currently being processed. Defaults to TRUE.

Details

The what parameter defaults to "all", which extracts all supported output. If you would like to extract a reduced set of output sections (especially to speed up the function when reading many files), specify the sections as a character vector from the following options:

c("input", "warn_err", "data_summary", "sampstat", "covariance_coverage", "summaries", "parameters", "class_counts", "indirect", "mod_indices", "residuals", "savedata", "bparameters", "tech1", "tech3", "tech4", "tech7", "tech8", "tech9", "tech10", "tech12", "fac_score_stats", "lcCondMeans", "gh5", "output")

Value

A list with one mplus.model per file. Each mplus.model object is composed of elements containing major output sections, as detailed below. If target is a single file, then the top-level elements will be a single mplus.model object, not a list of files. Specific elements are:

• input: Mplus input syntax parsed into a list by major section

• warnings: Syntax and estimation warnings as a list

• errors: Syntax and estimation errors as a list

• data_summary: Output of SUMMARY OF DATA section, including cluster sizes and ICCs

• sampstat: Sample statistics provided by OUTPUT: SAMPSTAT, if specified

• covariance_coverage: Covariance coverage matrix for checking missingness patterns

• summaries: Summary statistics from extractModelSummaries, having structure as specified by that function

• parameters: Model parameters from extractModelParameters, having structure as specified by that function

• class_counts: Latent class counts and proportions for models that include a categorical latent variable

• indirect: Output of MODEL INDIRECT if available in output. Contains $overall and $specific data.frames for each indirect effect section

• mod_indices: Model modification indices from extractModIndices, having structure as specified by that function

• residuals: a list containing relevant information from OUTPUT: RESIDUALS

• savedata_info: File information about SAVEDATA files related to this output

• savedata: SAVEDATA file as an R data.frame, as described in getSavedata_Data

• bparameters: an mcmc.list object containing the draws from the MCMC chains for a Bayesian model that uses the SAVEDATA: BPARAMETERS command

• tech1: a list containing parameter specification and starting values from OUTPUT: TECH1

• tech3: a list containing parameter covariance and correlation matrices from OUTPUT: TECH3

• tech4: a list containing means, covariances, and correlations for latent variables from OUTPUT: TECH4

• tech7: a list containing sample statistics for each latent class from OUTPUT: TECH7

• tech8: a list containing optimization history of the model. Currently only supports potential scale reduction in BAYES. OUTPUT: TECH8

• tech9: a list containing warnings/errors from replication runs for MONTECARLO analyses from OUTPUT: TECH9

• tech10: a list containing model fit information from OUTPUT: TECH10

• tech12: a list containing observed versus estimated sample statistics for TYPE=MIXTURE analyses from OUTPUT: TECH12

• fac_score_stats: factor score mean, correlation, and covariance structure from SAMPLE STATISTICS FOR ESTIMATED FACTOR SCORES section

• lcCondMeans: conditional latent class means and pairwise comparisons, obtained using auxiliary(e) syntax in latent class models

• r3step: predictors of latent class membership using the 3-step procedure (R3STEP)

• gh5: a list containing data from the gh5 (graphics) file corresponding to this output. (Requires rhdf5 package)

• h5results: a list containing data from h5results file produced by Mplus v8.11+. (Requires rhdf5 package)

• output: The entire, raw output file.

Author(s)

Michael Hallquist

Examples

## Not run: 
  allOutput <- readModels(
    "C:/Program Files/Mplus/Mplus Examples/User's Guide Examples", recursive=TRUE)

## End(Not run)

MplusAutomation documentation built on Sept. 9, 2025, 5:25 p.m.