Def data enhancements

NAMESPACE

@@ -17,6 +17,8 @@ export(defMiss)
 export(defRead)
 export(defReadAdd)
 export(defReadCond)
+export(defRepeat)
+export(defRepeatAdd)
 export(defSurv)
 export(delColumns)
 export(gammaGetShapeRate)

R/define_data.R

@@ -216,6 +216,147 @@ defDataAdd <- function(dtDefs = NULL,
   return(defNew[])
 }
 
+#' Add multiple (similar) rows to definitions table
+#'
+#' @param dtDefs Definition data.table to be modified
+#' @param nVars Number of new variables to define
+#' @param prefix Prefix (character) for new variables
+#' @param formula An R expression for mean (string)
+#' @param variance Number or formula
+#' @param dist Distribution. For possibilities, see details
+#' @param link The link function for the mean, see details
+#' @param id A string indicating the field name for the unique record identifier
+#' @return A data.table named dtName that is an updated data definitions table
+#' @seealso [distributions]
+#' @details The possible data distributions are: `r paste0(.getDists(),collapse = ", ")`.
+#'
+#' @examples
+#' def <- defRepeat(
+#'   nVars = 4, prefix = "g", formula = "1/3;1/3;1/3",
+#'   variance = 0, dist = "categorical"
+#' )
+#' def <- defData(def, varname = "a", formula = "1;1", dist = "trtAssign")
+#' def <- defRepeat(def, 8, "b", formula = "5 + a", variance = 3, dist = "normal")
+#' def <- defData(def, "y", formula = "0.10", dist = "binary")
+#'
+#' def
+#' @export
+#' @concept define_data
+defRepeat <- function(dtDefs = NULL,
+                      nVars,
+                      prefix,
+                      formula,
+                      variance = 0,
+                      dist = "normal",
+                      link = "identity",
+                      id = "id") {
+  assertNotMissing(
+    nVars = missing(nVars),
+    prefix = missing(prefix),
+    formula = missing(formula)
+  )
+
+  varnames <- paste0(prefix, 1:nVars)
+
+  if (is.null(dtDefs)) {
+    defNew <- defData(
+      varname = varnames[1], formula = formula,
+      variance = variance, dist = dist, link = link, id = id
+    )
+
+    for (i in (2:nVars)) {
+      defNew <- defData(defNew,
+        varname = varnames[i],
+        formula = formula, variance = variance,
+        dist = dist, link = link, id = id
+      )
+    }
+  } else {
+    defNew <- data.table::copy(dtDefs)
+
+    for (i in 1:nVars) {
+      defNew <- defData(defNew,
+        varname = varnames[i],
+        formula = formula, variance = variance,
+        dist = dist, link = link, id = id
+      )
+    }
+  }
+
+  return(defNew[])
+}
+
+#' Add multiple (similar) rows to definitions table that will be used to add data to an
+#' existing data.table
+#'
+#' @param dtDefs Definition data.table to be modified
+#' @param nVars Number of new variables to define
+#' @param prefix Prefix (character) for new variables
+#' @param formula An R expression for mean (string)
+#' @param variance Number or formula
+#' @param dist Distribution. For possibilities, see details
+#' @param link The link function for the mean, see details
+#' @param id A string indicating the field name for the unique record identifier
+#' @return A data.table named dtName that is an updated data definitions table
+#' @seealso [distributions]
+#' @details The possible data distributions are: `r paste0(.getDists(),collapse = ", ")`.
+#'
+#' @examples
+#' def <- defRepeatAdd(
+#'   nVars = 4, prefix = "g", formula = "1/3;1/3;1/3",
+#'   variance = 0, dist = "categorical"
+#' )
+#' def <- defDataAdd(def, varname = "a", formula = "1;1", dist = "trtAssign")
+#' def <- defRepeatAdd(def, 8, "b", formula = "5 + a", variance = 3, dist = "normal")
+#' def <- defDataAdd(def, "y", formula = "0.10", dist = "binary")
+#'
+#' def
+#' @export
+#' @concept define_data
+defRepeatAdd <- function(dtDefs = NULL,
+                         nVars,
+                         prefix,
+                         formula,
+                         variance = 0,
+                         dist = "normal",
+                         link = "identity",
+                         id = "id") {
+  assertNotMissing(
+    nVars = missing(nVars),
+    prefix = missing(prefix),
+    formula = missing(formula)
+  )
+
+  varnames <- paste0(prefix, 1:nVars)
+
+  if (is.null(dtDefs)) {
+    defNew <- defDataAdd(
+      varname = varnames[1], formula = formula,
+      variance = variance, dist = dist, link = link
+    )
+
+    for (i in (2:nVars)) {
+      defNew <- defDataAdd(defNew,
+        varname = varnames[i],
+        formula = formula, variance = variance,
+        dist = dist, link = link
+      )
+    }
+  } else {
+    defNew <- data.table::copy(dtDefs)
+
+    for (i in 1:nVars) {
+      defNew <- defDataAdd(defNew,
+        varname = varnames[i],
+        formula = formula, variance = variance,
+        dist = dist, link = link
+      )
+    }
+  }
+
+  return(defNew[])
+}
+
 #' Read external csv data set definitions
 #'
 #' @param filen String file name, including full path. Must be a csv file.
@@ -450,11 +591,10 @@ defSurv <- function(dtDefs = NULL,
                     formula = 0,
                     scale,
                     shape = 1) {
-
   if (is.null(dtDefs)) {
     dtDefs <- data.table::data.table()
   }
-  
+
   dt.new <- data.table::data.table(
     varname,
     formula,
@@ -520,57 +660,42 @@ defSurv <- function(dtDefs = NULL,
     newvar <- ensureValidName(newvar, call = sys.call(-1))
     assertNotInDataTable(vars = newvar, dt = defVars)
 
-    switch(
-      newdist,
-
+    switch(newdist,
       binary = {
         .isValidArithmeticFormula(newform, defVars)
         .isIdLogit(link)
       },
-
       beta = ,
       binomial = {
         .isValidArithmeticFormula(newform, defVars)
         .isValidArithmeticFormula(variance, defVars)
         .isIdLogit(link)
       },
-
       noZeroPoisson = ,
-
       poisson = ,
-
       exponential = {
         .isValidArithmeticFormula(newform, defVars)
         .isIdLog(link)
       },
-
       gamma = ,
-
       negBinomial = {
         .isValidArithmeticFormula(newform, defVars)
         .isValidArithmeticFormula(variance, defVars)
         .isIdLog(link)
       },
-
       nonrandom = .isValidArithmeticFormula(newform, defVars),
-
       normal = {
         .isValidArithmeticFormula(newform, defVars)
         .isValidArithmeticFormula(variance, defVars)
       },
-
       categorical = .checkCategorical(newform),
-
       mixture = {
         .isValidArithmeticFormula(newform, defVars)
         .checkMixture(newform)
       },
-
       uniform = ,
-
       uniformInt = .checkUniform(newform),
-      trtAssign =  .checkCategorical(newform),
-
+      trtAssign = .checkCategorical(newform),
       stop("Unknown distribution.")
     )
 
@@ -651,7 +776,7 @@ defSurv <- function(dtDefs = NULL,
 
 #' Check uniform formula
 #'
-#' @description Unifom formulas must be of the form "min;max"
+#' @description Uniform formulas must be of the form "min;max"
 #' @param formula Formula as string.
 #' @return Invisible, error if formula not valid.
 #' @seealso distributions

tests/testthat/test-add_data.R

@@ -31,4 +31,27 @@ test_that("addColumns works.", {
   def2 <- defDataAdd(varname = "y", formula = "2.3 * (1/x)", dist = "normal")
 
   expect_silent(addColumns(def2, dt))
-})
+})
+
+test_that("defRepeatAdd works", {
+  expect_silent(
+    defRepeatAdd(nVars = 4, prefix = "g", formula = "1/3;1/3;1/3", variance = 0, dist = "categorical")
+  )
+
+  def <- defDataAdd(varname = "a", formula = "1;1", dist = "trtAssign")
+  expect_silent(
+    defRepeatAdd(def, 8, "b", formula = "5 + a", variance = 3, dist = "normal")
+  )
+
+  expect_silent(defRepeatAdd(nVars = 4, prefix = "b", formula = "5 + a", variance = 3, dist = "normal"))
+
+})
+
+test_that("defRepeatAdd throws errors correctly.", {
+  expect_error(defRepeatAdd(prefix = "b", formula = 5, variance = 3, dist = "normal"),
+    class = "simstudy::missingArgument")
+  expect_error(defRepeatAdd(nVars = 8, formula = 5, variance = 3, dist = "normal"),
+    class = "simstudy::missingArgument")
+  expect_error(defRepeatAdd(nVars = 8, prefix = "b", variance = 3, dist = "normal"),
+    class = "simstudy::missingArgument")
+})