zoo (version 1.6-2)

na.trim: Trim Leading/Trailing Missing Observations

Description

Generic function for removing leading and trailing NAs.

Usage

na.trim(object, ...)
## S3 method for class 'default':
na.trim(object, sides = c("both", "left", "right"), 
	is.na = c("any", "all"), ...)

Arguments

object
an object.
sides
character specifying whether NAs are to be removed from both sides, just from the left side or just from the right side.
is.na
If "any" then a row will be regarded as NA if it has any NAs. If "all" then a row will be regarded as NA only if all elements in the row are NA. For one dimensional zoo objects this argument has
...
further arguments passed to methods.

Value

  • An object in which leading and/or trailing NAs have been removed.

See Also

na.approx, na.contiguous, na.locf, na.omit, na.spline, stinterp, zoo

Examples

Run this code
# 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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