[R] round up a number to 10^4

[jim holtman]

Also be aware of the IEEE standard of rounding to even:

> round(61000, -4)
[1] 60000
> round(62000, -4)
[1] 60000
> round(65000, -4)
[1] 60000
> round(66000, -4)
[1] 70000
> round(76000, -4)
[1] 80000
> round(75000, -4)
[1] 80000
>
notice what 65000 rounds to and what 75000 rounds to.
On Tue, Nov 1, 2011 at 4:13 PM, Bert Gunter <gunter.berton at gene.com> wrote:
> Yes, I agree with David that this looks like an error.
>
> However, for fun, one might ask: what is the fewest number of R elementary
> math operations that would produce such a result -- this might be good for
> clever 6th or 7th graders, for example.
>
> For here, I leave this as an exercise for the reader.
>
> -- Bert
>
> On Tue, Nov 1, 2011 at 12:42 PM, David Winsemius <dwinsemius at comcast.net>wrote:
>
>>
>> On Nov 1, 2011, at 1:07 PM, Wendy wrote:
>>
>>  Hi all,
>>>
>>> I have a list of numbers, e.g., X = c(60593.23, 71631.17, 75320.1), and
>>> want
>>> to round them  so the output is Y = c(60000, 80000, 80000).
>>>
>>
>> Under what notion of "rounding" would that be the result?
>>
>>  I tried
>>> Y<-round(X,-4), but it gives me Y = c(60000, 70000, 80000). Do anybody
>>> know
>>> how to round up a number to 10^4?
>>>
>>> Thank you in advance.
>>>
>>
>>
>> --
>> David Winsemius, MD
>> Heritage Laboratories
>> West Hartford, CT
>>
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>>
>
>
>
> --
>
> Bert Gunter
> Genentech Nonclinical Biostatistics
>
> Internal Contact Info:
> Phone: 467-7374
> Website:
> http://pharmadevelopment.roche.com/index/pdb/pdb-functional-groups/pdb-biostatistics/pdb-ncb-home.htm
>
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>
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>



-- 
Jim Holtman
Data Munger Guru

What is the problem that you are trying to solve?
Tell me what you want to do, not how you want to do it.