ValidatePairLinksAreSymmetric: Verifies that the pair relationships are symmetric.

Description

Validates that the linksPair data frame is symmetric. In a symmetric linksPair, each row has a corresponding row with reversed SubjectTag_S1 and SubjectTag_S2, but the same R value. For certain analyses (like types of DF methods and some spatially-inspired methods), the pairs links (which can be considered a type of sparse matrix) need to be symmetric. For example, if Subject 201 is related to Subject 202 with a value of R=0.5, then there must be a reciprocal row where Subject 202 is related to Subject 201 with R=0.5.

Usage

ValidatePairLinksAreSymmetric(linksPair)

Value

Returns TRUE if symmetric. Throw an error with base::stop() if asymmetric.

Arguments

linksPair: A base::data.frame containing the pair relationships that should be symmetric

Author

Will Beasley

Examples

Run this code

dsSingleLinks <- data.frame(
  ExtendedID       = c(1, 1, 1, 2),
  SubjectTag_S1    = c(101, 101, 102, 201),
  SubjectTag_S2    = c(102, 103, 103, 202),
  R                = c(.5, .25, .25, .5),
  RelationshipPath = rep("Gen2Siblings", 4)
)
dsSingleOutcomes <- data.frame(
  SubjectTag = c(101, 102, 103, 201, 202),
  DV1        = c(11, 12, 13, 41, 42),
  DV2        = c(21, 22, 23, 51, 52)
)
dsDouble <- CreatePairLinksDoubleEntered(
  outcomeDataset         = dsSingleOutcomes,
  linksPairDataset       = dsSingleLinks,
  outcomeNames           = c("DV1", "DV2"),
  validateOutcomeDataset = TRUE
)
dsDouble # Show the 8 rows in the double-entered pair links
summary(dsDouble) # Summarize the variables

ValidatePairLinksAreSymmetric(dsDouble) # Should return TRUE.