Bounds of a Numeric Vector
Find the ‘bounds’ (i.e. start, end and length) of consecutive numbers within a larger set of numbers in a given vector.
bounds(nums, dup.inds=FALSE, pre.sort=TRUE)
nums |
a numeric vector. |
dup.inds |
logical, if TRUE the bounds of consecutive duplicated elements are returned. |
pre.sort |
logical, if TRUE the input vector is ordered prior to bounds determination. |
This is a simple utility function useful for summarizing the contents of a numeric vector. For example: find the start position, end position and lengths of secondary structure elements given a vector of residue numbers obtained from a DSSP secondary structure prediction.
By setting ‘dup.inds’ to TRUE then the indices of the first (start) and last (end) duplicated elements of the vector are returned. For example: find the indices of atoms belonging to a particular residue given a vector of residue numbers (see below).
Returns a three column matrix listing starts, ends and lengths.
Barry Grant
Grant, B.J. et al. (2006) Bioinformatics 22, 2695–2696.
test <- c(seq(1,5,1),8,seq(10,15,1)) bounds(test) test <- rep(c(1,2,4), times=c(2,3,4)) bounds(test, dup.ind=TRUE)
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