[R] how to calculate a numeric's digits count?

[Jeff Newmiller]

I am baffled. I think those were English words but they didn't make any sense to me. Not was there a reproducible example to turn to. Can you try again?
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Sent from my phone. Please excuse my brevity.

On October 23, 2014 8:35:06 PM PDT, PO SU <rhelpmaillist at 163.com> wrote:
>
>Dear usRers,
>  Now i want to cal ,e.g. 
> cal(1.234)  will get 3
> cal(1) will get 0
> cal(1.3045) will get 4
> But the difficult part is cal(1.3450) will get 4 not 3.
>So, is there anyone happen to know the solution to this problem, or it
>can't be solved in R, because 1.340 will always be transformed autolly
>to 1.34?
>
>
>
>
>
>
>--
>
>PO SU
>mail: desolator88 at 163.com 
>Majored in Statistics from SJTU
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>and provide commented, minimal, self-contained, reproducible code.