Add single row to definitions table of conditions that will be used to add data to an existing definitions table

defCondition(
  dtDefs = NULL,
  condition,
  formula,
  variance = 0,
  dist = "normal",
  link = "identity"
)

Arguments

dtDefs

Name of definition table to be modified. Null if this is a new definition.

condition

Formula specifying condition to be checked

formula

An R expression for mean (string)

variance

Number

dist

Distribution. For possibilities, see details

link

The link function for the mean, see details

Value

A data.table named dtName that is an updated data definitions table

See also

Examples

# New data set def <- defData(varname = "x", dist = "noZeroPoisson", formula = 5) def <- defData(def, varname = "y", dist = "normal", formula = 0, variance = 9) dt <- genData(10, def) # Add columns to dt defC <- defCondition( condition = "x == 1", formula = "5 + 2*y", variance = 1, dist = "normal" ) defC <- defCondition(defC, condition = "x <= 5 & x >= 2", formula = "3 - 2*y", variance = 1, dist = "normal" ) defC <- defCondition(defC, condition = "x >= 6", formula = 1, variance = 1, dist = "normal" ) defC
#> condition formula variance dist link #> 1: x == 1 5 + 2*y 1 normal identity #> 2: x <= 5 & x >= 2 3 - 2*y 1 normal identity #> 3: x >= 6 1 1 normal identity
# Add conditional column with field name "z" dt <- addCondition(defC, dt, "z") dt
#> id z x y #> 1: 1 12.60493882 5 -4.8401325 #> 2: 2 0.06657201 4 1.1153079 #> 3: 3 9.88180241 2 -2.7703308 #> 4: 4 16.58747478 5 -6.9123133 #> 5: 5 4.97777186 5 -0.8299244 #> 6: 6 5.80134321 4 -1.6118639 #> 7: 7 0.91513328 8 -0.2025508 #> 8: 8 1.49741504 6 -4.9571323 #> 9: 9 2.67471877 10 4.1792946 #> 10: 10 3.76736873 5 -1.0166581