where {ape} | R Documentation |
This function finds patterns in a single or a set of DNA sequences.
where(x, pattern)
x |
an object of class |
pattern |
a character string to be searched in |
If x
is a vector, the function returns a single vector giving
the position(s) where the pattern was found. If x
is a matrix
or a list, it returns a list with the positions of the pattern for
each sequence.
Patterns may be overlapping. For instance, if pattern = "tata"
and the sequence starts with ‘tatata’, then the output will be c(1, 3).
a vector of integers or a list of such vectors.
Emmanuel Paradis
data(woodmouse) where(woodmouse, "tata")