# AddMonthsYM

From DescTools v0.99.19
by Andri Signorell

##### Add a Month to a Date

The format YYYYMM for dates can sometimes be convenient. Adding a number of months to such a date however is tedious, as the date structure should going to be preserved. Think of e.g. 201201 - 2 months, which would be expected to yield 201111. AddMonthsYM does this job.

- Keywords
- chron

##### Usage

`AddMonthsYM(x, n)`

##### Arguments

- x
- a vector of integers, representing the dates in the format YYYYMM, to which a number of months has to be added.
- n
- the number of months to be added. If n is negative the months will be subtracted.

##### Details

All parameters will be recyled if necessary. The therefore used function `mapply`

will display a warning, if the longer argument is not a multiple of the length of the shorter one.

##### Value

`integer`

with the same dimension as x, containing the transformed dates.
##### See Also

##### Examples

```
AddMonthsYM(201511, 5)
AddMonthsYM(c(201511, 201302), c(5, 15))
AddMonthsYM(c(201511, 201302), c(5, -4))
```

*Documentation reproduced from package DescTools, version 0.99.19, License: GPL (>= 2)*

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