Computes shortest edit script to convert a into b by removing
elements from a and adding elements from b. Intended primarily
for debugging or for other applications that understand that particular
format. See http://www.gnu.org/software/diffutils/manual/diffutils.html#Detailed-Normal
for how to interpret the symbols.
integer(1L), number of differences after which we
abandon the O(n^2) diff algorithm in favor of a naive element by
element comparison. Set to -1L to always stick to the original
algorithm (defaults to 50000L).
warn
TRUE (default) or FALSE whether to warn if we hit `max.diffs`.
Value
character
Details
ses will be much faster than any of the
diff* methods, particularly for large inputs with
limited numbers of differences.
NAs are treated as the string “NA”. Non-character inputs are coerced
to character.