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Check for observed variables in qml/lms, and throw an error
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| Original file line number | Diff line number | Diff line change |
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| checkModel <- function(model, covModel = NULL, method = "lms") { | ||
| checkCovModelVariables(covModel = covModel, modelXis = model$info$xis) | ||
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| checkNodesLms(parTableMain = model$parTable, | ||
| parTableCov = covModel$parTable, | ||
| nodes = model$quad$m, method = method) | ||
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| checkOVsInStructuralModel(parTableMain = model$parTable, | ||
| parTableCov = covModel$parTable) | ||
| NULL | ||
| } | ||
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| checkCovModelVariables <- function(covModel, modelXis) { | ||
| if (is.null(covModel$info)) return(NULL) # nothing to check | ||
| covModelEtas <- covModel$info$etas | ||
| covModelXis <- covModel$info$xis | ||
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| stopif(!all(c(covModelXis, covModelEtas) %in% modelXis), | ||
| "All latent variables in the cov-model must be an ", | ||
| "exogenous variable in the main model") | ||
| stopif(!all(modelXis %in% c(covModelXis, covModelEtas)), | ||
| "All exogenous variables in main model must be ", | ||
| "part of the cov-model") | ||
| } | ||
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| checkNodesLms <- function(parTableMain, | ||
| parTableCov, | ||
| nodes, | ||
| method = "lms", | ||
| minNodesXiXi = 16, | ||
| minNodesXiEta = 32, | ||
| minNodesEtaEta = 48) { | ||
| if (method != "lms") return(NULL) | ||
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| parTable <- rbind(parTableMain, parTableCov) | ||
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| etas <- getEtas(parTable, isLV = TRUE) | ||
| xis <- getXis(parTable, etas = etas, isLV = TRUE) | ||
| varsInts <- getVarsInts(getIntTermRows(parTable)) | ||
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| nodesXiXi_ok <- TRUE | ||
| nodesXiEta_ok <- TRUE | ||
| nodesEtaEta_ok <- TRUE | ||
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| lapply(varsInts, FUN = function(x) { | ||
| if (all(x %in% xis)) nodesXiXi_ok <<- nodes >= minNodesXiXi | ||
| else if (all(x %in% etas)) nodesEtaEta_ok <<- nodes >= minNodesEtaEta | ||
| else if (any(x %in% etas)) nodesXiEta_ok <<- nodes >= minNodesXiEta | ||
| else warning2("Unable to classify latent variables in interaction terms") | ||
| }) | ||
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| warnif(!nodesXiXi_ok, "It is recommended that you have at least ", | ||
| minNodesXiXi, " nodes for interaction effects between ", | ||
| "exogenous variables in the lms approach 'nodes = ", nodes, "'") | ||
| warnif(!nodesXiEta_ok, "It is recommended that you have at least ", | ||
| minNodesXiEta, " nodes for interaction effects between exogenous ", | ||
| "and endogenous variables in the lms approach 'nodes = ", nodes, "'") | ||
| warnif(!nodesEtaEta_ok, "It is recommended that you have at least ", | ||
| minNodesEtaEta, " nodes for interaction effects between endogenous ", | ||
| "variables in the lms approach 'nodes = ", nodes, "'") | ||
| } | ||
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| checkOVsInStructuralModel <- function(parTableMain, parTableCov) { | ||
| parTable <- rbind(parTableMain, parTableCov) | ||
| xisLVs <- getXis(parTable, isLV = TRUE) | ||
| xisAll <- getXis(parTable, isLV = FALSE) | ||
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| stopif(length(xisAll) != length(xisLVs) || !all(xisLVs %in% xisAll), | ||
| "Observed variables are not allowed in the structural model in LMS/QML directly. ", | ||
| "Please redefine them as latent.\nSee:\n", | ||
| " vignette(\"observed_lms_qml\", \"modsem\")") | ||
| } |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,49 @@ | ||
| devtools::load_all() | ||
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| m1 <- ' | ||
| # Outer Model | ||
| X =~ x1 + x2 +x3 | ||
| Y =~ y1 + y2 + y3 | ||
| Z =~ z1 + z2 + z3 | ||
| # Inner model | ||
| Y ~ X + Z + X:Z + x1 | ||
| ' | ||
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| testthat::expect_error(modsem(m1, oneInt, method = "lms"), | ||
| regexp = "Observed variables are not allowed in .*") | ||
| testthat::expect_error(modsem(m1, oneInt, method = "qml"), | ||
| regexp = "Observed variables are not allowed in .*") | ||
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| m2 <- ' | ||
| # Outer Model | ||
| X =~ x1 + x2 +x3 | ||
| Y =~ y1 + y2 + y3 | ||
| Z =~ z1 + z2 + z3 | ||
| # Inner model | ||
| Y ~ X + Z + X:Z + jk | ||
| ' | ||
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| testthat::expect_error(modsem(m2, oneInt, method = "lms"), | ||
| regexp = "Observed variables are not allowed in .*") | ||
| testthat::expect_error(modsem(m2, oneInt, method = "qml"), | ||
| regexp = "Observed variables are not allowed in .*") | ||
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| m3 <- ' | ||
| # Outer Model | ||
| X =~ x1 + x2 +x3 | ||
| Y =~ y1 + y2 + y3 | ||
| Z =~ z1 + z2 + z3 + jk | ||
| # Inner model | ||
| Y ~ X + Z + X:Z | ||
| ' | ||
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| testthat::expect_error(modsem(m3, oneInt, method = "lms"), | ||
| regexp = "Missing observed variables in data:.*jk.*") | ||
| testthat::expect_error(modsem(m3, oneInt, method = "qml"), | ||
| regexp = "Missing observed variables in data:.*jk.*") |