wrMisc (version 1.15.3.1)

nonAmbiguousMat: Transform matrix to non-ambiguous matrix (in respect to given column)

Description

nonAmbiguousMat makes values of matrix 'mat' in col 'byCol' unique.

Usage

nonAmbiguousMat(
  mat,
  byCol,
  uniqOnly = FALSE,
  asList = FALSE,
  nameMod = "amb_",
  callFrom = NULL
)

Value

sorted non-ambigous numeric vector (or list if 'asList'=TRUE and 'uniqOnly'=FALSE)

Arguments

mat

numeric or character matrix (or data.frame), column specified by 'byCol' must be/will be used as.numeric, 1st column of 'mat' will be considered like index & used for adding prefix 'nameMod' (unless byCol=1, then 2nd col will be used)

byCol

(character or integer-index) column by which ambiguousity will be tested

uniqOnly

(logical) if =TRUE return unique only, if =FALSE return unique and single representative of non-unique values (with '' added to name), selection of representative of repeated: first (of sorted) or middle if >2 instances

asList

(logical) return result as list

nameMod

(character) prefix added to 1st column of 'mat' (expect 'by') for indicating non-unique/ambiguous values

callFrom

(character) allow easier tracking of message(s) produced

See Also

for non-numeric use firstOfRepeated - but 1000x much slower !; get1stOfRepeatedByCol

Examples

set.seed(2017); mat2 <- matrix(c(1:100,round(rnorm(200),2)),ncol=3,
  dimnames=list(1:100,LETTERS[1:3]));
head(mat2U <- nonAmbiguousMat(mat2,by="B",na="_",uniqO=FALSE),n=15)
head(get1stOfRepeatedByCol(mat2,sortB="B",sortS="B"))