Filter matrix to keep only first of repeated lines
This function aims to reduce the complexity of a matrix (or data.frame) in case column 'refCol' has multiple lines with same value.
In this case, it reduces the input-data to 1st line of redundant entries and returns a matrix (or data.frame) without lines identified as redundant entries for 'refCol').
in sum, this functions works lile useng unique on a given column, and propagates the same treatment to all other columns.
firstLineOfDat(dat, refCol = 2, silent = FALSE, callFrom = NULL)
dat |
(matrix or data.frame) main input |
refCol |
(integer) column number of reference-column |
silent |
(logical) suppress messages |
callFrom |
(character) allosw easier tracking of message(s) produced |
matrix (same number of columns as input)
(mat1 <- matrix(c(1:6,rep(1:3,1:3)),ncol=2,dimnames=list(letters[1:6],LETTERS[1:2]))) firstLineOfDat(mat1)
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