Trim Leading/Trailing Missing Observations
Generic function for removing leading and trailing
na.trim(object, ...) ## S3 method for class 'default': na.trim(object, sides = c("both", "left", "right"), ...)
- an object.
- character specifying whether
NAs are to be removed from both sides, just from the left side or just from the right side.
- further arguments passed to methods.
- An object in which leading and/or trailing
NAs have been removed.
# examples of na.trim x <- zoo(c(1, 4, 6), c(2, 4, 6)) xx <- zoo(matrix(c(1, 4, 6, NA, 5, 7), 3), c(2, 4, 6)) na.trim(x) na.trim(xx) # using na.trim for alignment # cal defines the legal dates # all dates within the date range of x should be present cal <- zoo(,c(1, 2, 3, 6, 7)) x <- zoo(c(12, 16), c(2, 6)) na.trim(merge(x, cal))
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