seq.ymon: Sequence generation
In DavisVaughan/datea: Extended Date Classes

Description Usage Arguments Examples

View source: R/ymon-seq.R

This seq() method generates regular sequences of ymon objects. It functions the same as the default seq() method, except that fractional sequences that might be generated by seq(to =, length.out =) are not allowed.

seq() methods require a from argument, and any combination of two of the other arguments. The only combination not allowed is length.out and along.with, because they represent the same information.

1 2	## S3 method for class 'ymon' seq(from, to, by, length.out, along.with, ...)

`from`	`[ymon]` A ymon.
`to`	`[ymon]` Optional. A ymon.
`by`	`[integer(1)]` Optional. A single integer representing the step size. Must be negative if `to` is supplied and the sequence between `from` and `to` is decreasing.
`length.out`	`[integer(1)]` Optional. A single integer representing the final output size. If `to` is supplied, this must divide the distance between `from` and `to` into equally spaced pieces, otherwise an error is thrown.
`along.with`	`[vector]` Optional. A vector to take the length of. The length of the vector is used as the `length.out` value.
`...`	Not used.

x <- ymon(1970, 1)

seq(x, by = 3, length.out = 10)

seq(x, to = ymon(1980, 1), by = 6)

seq(x, to = ymon(1980, 1), length.out = 5)

# 4 values between 1970-01 and 1970-04, there
# is no way to divide these evenly into 3 equally spaced pieces!
try(seq(x, to = ymon(1970, 4), length.out = 3))