The data in these vectors are stored on disk (partially buffered for speed) allowing one to work with more data than fits into available memory.
the size of the vector
the type of the vector. Should be one of the following value:
in case of a vector of type
The minimum value of
strlen is two. When a value smaller than that is
given it is automatically set to two. This is because a minimum of two bytes
is necessary to also store missing values correctly.
Returns an object of type
lvec. Elements of this vector are stored on
file (partially buffered in memory for speed) allowing one to work with more
data than fits into memory.
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# create an integer vector of length 100 x <- lvec(100, type = "integer") # Get the first 10 values; values are initialised to 0 by default lget(x, 1:10) # Set the first 10 values to 11:20 lset(x, 1:10, 11:20) # set maximum length of the string to 1, strings longer than that get # truncated. However, minimum value of strlen is 2. x <- lvec(10, type = "character", strlen = 1) lset(x, 1:3, c("a", "foo", NA)) lget(x, 1:3)
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