umx (version 4.0.0)

umx: Functions for Structural Equation Modeling in OpenMx

Description

umx allows you to more easily build, run, modify, and report structural models, building on the OpenMx package. All core functions are organized into families, so they are easier to find (see "families" below under See Also)

All the functions have full-featured and well commented examples, some even have figures, so use the help, even if you think it won't help :-) Have a look, for example at umxRAM()

Check out NEWS about new features at news(package = "umx")

Details

Introductory working examples are below. You can run all demos with demo(umx) When I have a vignette, it will be: vignette("umx", package = "umx")

There is a helpful blog at https://tbates.github.io

(Only) if you want the bleeding-edge version:

devtools::install_github("tbates/umx")

References

• https://www.github.com/tbates/umx

See Also

Other Teaching and testing Functions: tmx_genotypic_effect(), tmx_is.identified()

Other Core Modeling Functions: umxAlgebra(), umxMatrix(), umxModify(), umxPath(), umxRAM(), umxRun(), umxSummary(), umxSuperModel()

Other Reporting Functions: loadings.MxModel(), umxAPA(), umxFactorScores(), umxGetParameters(), umxParameters(), umxReduce(), umx_aggregate(), umx_names(), umx_time()

Other Modify or Compare Models: umxEquate(), umxFixAll(), umxMI(), umxModify(), umxSetParameters(), umxUnexplainedCausalNexus()

Other Plotting functions: plot.MxLISRELModel(), plot.MxModel(), umxPlotACEcov(), umxPlotACEv(), umxPlotACE(), umxPlotCP(), umxPlotGxEbiv(), umxPlotGxE(), umxPlotIP(), umxPlotSexLim(), umxPlotSimplex()

Other Super-easy helpers: umxEFA(), umxMendelianRandomization()

Other Twin Modeling Functions: plot.MxModelTwinMaker(), power.ACE.test(), umxACEcov(), umxACEv(), umxACE(), umxCP(), umxDoCp(), umxDoC(), umxGxE_window(), umxGxEbiv(), umxGxE(), umxIP(), umxRotate.MxModelCP(), umxSexLim(), umxSimplex()

Other Twin Reporting Functions: umxPlotCP(), umxPlotDoC(), umxReduceACE(), umxReduceGxE(), umxReduce(), umxSummarizeTwinData(), umxSummaryACEcov(), umxSummaryACEv(), umxSummaryACE(), umxSummaryCP(), umxSummaryDoC(), umxSummaryGxEbiv(), umxSummaryGxE(), umxSummaryIP(), umxSummarySexLim(), umxSummarySimplex()

Other Twin Data functions: umx_long2wide(), umx_make_TwinData(), umx_make_twin_data_nice(), umx_residualize(), umx_scale_wide_twin_data(), umx_wide2long()

Other Get and set: umx_get_checkpoint(), umx_get_options(), umx_set_auto_plot(), umx_set_auto_run(), umx_set_checkpoint(), umx_set_condensed_slots(), umx_set_cores(), umx_set_data_variance_check(), umx_set_mvn_optimization_options(), umx_set_optimizer(), umx_set_plot_file_suffix(), umx_set_plot_format(), umx_set_separator(), umx_set_silent(), umx_set_table_format()

Other Check or test: umx_check_names(), umx_is_class(), umx_is_endogenous(), umx_is_exogenous(), umx_is_numeric(), umx_is_ordered()

Other Data Functions: umxFactor(), umxHetCor(), umx_as_numeric(), umx_cont_2_quantiles(), umx_lower2full(), umx_make_MR_data(), umx_make_TwinData(), umx_make_fake_data(), umx_make_raw_from_cov(), umx_polychoric(), umx_polypairwise(), umx_polytriowise(), umx_read_lower(), umx_rename(), umx_reorder(), umx_select_valid(), umx_stack()

Other File Functions: dl_from_dropbox(), umx_file_load_pseudo(), umx_make_sql_from_excel(), umx_move_file(), umx_open(), umx_rename_file(), umx_write_to_clipboard()

Other String Functions: umx_explode_twin_names(), umx_explode(), umx_grep(), umx_names(), umx_paste_names(), umx_rot(), umx_str_chars(), umx_str_from_object(), umx_trim()

Other Miscellaneous Stats Helpers: FishersMethod(), SE_from_p(), oddsratio(), reliability(), umxCov2cor(), umxHetCor(), umxWeightedAIC(), umx_apply(), umx_cor(), umx_means(), umx_r_test(), umx_round(), umx_scale(), umx_var()

Other Miscellaneous Utility Functions: install.OpenMx(), qm(), umxBrownie(), umxLav2RAM(), umxRAM2Lav(), umxVersion(), umx_array_shift(), umx_find_object(), umx_msg(), umx_open_CRAN_page(), umx_pad(), umx_print(), umx_score_scale()

Other datasets: Fischbein_wt, GFF, docData, iqdat, us_skinfold_data

Other Advanced Model Building Functions: umxJiggle(), umxLabel(), umxThresholdMatrix(), umxValues()

Other xmu internal not for end user: umxModel(), umxRenameMatrix(), umxTwinMaker(), umx_APA_pval(), umx_fun_mean_sd(), umx_get_bracket_addresses(), umx_make(), umx_standardize(), umx_string_to_algebra(), xmuHasSquareBrackets(), xmuLabel_MATRIX_Model(), xmuLabel_Matrix(), xmuLabel_RAM_Model(), xmuMI(), xmuMakeDeviationThresholdsMatrices(), xmuMakeOneHeadedPathsFromPathList(), xmuMakeTwoHeadedPathsFromPathList(), xmuMaxLevels(), xmuMinLevels(), xmuPropagateLabels(), xmuRAM2Ordinal(), xmuTwinSuper_Continuous(), xmuTwinUpgradeMeansToCovariateModel(), xmu_CI_merge(), xmu_CI_stash(), xmu_DF_to_mxData_TypeCov(), xmu_PadAndPruneForDefVars(), xmu_cell_is_on(), xmu_check_levels_identical(), xmu_check_needs_means(), xmu_check_variance(), xmu_clean_label(), xmu_data_missing(), xmu_data_swap_a_block(), xmu_describe_data_WLS(), xmu_dot_make_paths(), xmu_dot_make_residuals(), xmu_dot_maker(), xmu_dot_move_ranks(), xmu_dot_rank_str(), xmu_extract_column(), xmu_get_CI(), xmu_lavaan_process_group(), xmu_make_TwinSuperModel(), xmu_make_bin_cont_pair_data(), xmu_make_mxData(), xmu_match.arg(), xmu_name_from_lavaan_str(), xmu_path2twin(), xmu_path_regex(), xmu_safe_run_summary(), xmu_set_sep_from_suffix(), xmu_show_fit_or_comparison(), xmu_simplex_corner(), xmu_standardize_ACEcov(), xmu_standardize_ACEv(), xmu_standardize_ACE(), xmu_standardize_CP(), xmu_standardize_IP(), xmu_standardize_RAM(), xmu_standardize_SexLim(), xmu_standardize_Simplex(), xmu_start_value_list(), xmu_starts(), xmu_twin_add_WeightMatrices(), xmu_twin_check(), xmu_twin_get_var_names(), xmu_twin_upgrade_selDvs2SelVars()

Examples

# NOT RUN {
require("umx")
data(demoOneFactor)
manifests = names(demoOneFactor)
m1 = umxRAM("One Factor", data = demoOneFactor, type="cov",
	umxPath("G", to = manifests),
	umxPath(var = manifests),
	umxPath(var = "G"  , fixedAt= 1)
)

# umx added informative labels, created starting values, 
# Ran you model (if autoRun is on), and displayed a brief summary
# including a comparison if you modified a model...!

# Let's get some journal-ready fit information for standardized parameters

umxSummary(m1, std = TRUE)
# You can get the coefficients of an MxModel with coef(), just like for lm etc.
coef(m1)

# But with more control using "parameters", for example just the G loadings
# above .3, rounded to 2-digits.
parameters(m1, thresh="above", b=.3, pattern = "G_to.*", digits = 2)

# ==================
# = Model updating =
# ==================
# We'll use umxModify to modify the model...
# Can we set the loading of x1 on G to zero? (nope...)
m2 = umxModify(m1, "G_to_x1", name = "no_effect_of_g_on_X1", comparison = TRUE)

# note1: umxSetParameters can do this with some additional flexibility
# note2 "comparison = TRUE" above is the same as calling 
# umxCompare, like this
umxCompare(m1, m2)


# ========================
# = Confidence intervals =
# ========================

# umxSummary() will show these, but you can also use the confint() function
confint(m1) # OpenMx's SE-based confidence intervals


# }
# NOT RUN {
# umxConfint formats everything you need nicely, and allows adding CIs (with parm=)
umxConfint(m1, parm = 'all', run = TRUE) # likelihood-based CIs

# And make a Figure and open in browser
plot(m1, std = TRUE)

# If you just want the .dot code returned set file = NA
plot(m1, std = TRUE, file = NA)
# }
# NOT RUN {
# }