Edge case dataset with 90 patients where all test results are negative. Tests handling of degenerate scenarios.
Format
A data frame with 90 rows and 3 variables:
- patient_id
Character: Patient identifier (PT001-PT090)
- Test1
Factor: All "Negative"
- Test2
Factor: All "Negative"
- age
Numeric: Patient age in years (mean 52, SD 11)
Details
Zero variance scenario. Should trigger appropriate error messages or warnings about inability to estimate test characteristics.
Examples
data(nogoldstandard_allnegative)
# Should produce error or warning
if (FALSE) { # \dontrun{
nogoldstandard(data = nogoldstandard_allnegative,
test1 = "Test1", test1Positive = "Positive",
test2 = "Test2", test2Positive = "Positive")
} # }