[R] format integer numbers with leading 0

[Lasse Kliemann]

Marc Girondot via R-help <r-help at r-project.org> writes:

> I would like format integer number as characters with leading 0 for a 
> fixed width, for example:
>
> 1 shoud be "01"
> 2 shoud be "02"
> 20 should be "20"

formatC(x, width=2, flag="0")
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