Paul Smith wrote:
> On 9/6/07, João Fadista <[EMAIL PROTECTED]> wrote:
>
>> I would like to know how can I order a data.frame with increasing the
>> dat$Interval (dat$Interval is a factor). There is an example below.
>>
>> Original data.frame:
>>
>>
>>> dat
>>>
>> Interval Number_reads
>> 0-100 685
>> 200-300 744
>> 100-200 1082
>> 300-400 4213
>>
>>
>>
>>> Desired_dat:
>>>
>> Interval Number_reads
>> 0-100 685
>> 100-200 1082
>> 200-300 744
>> 300-400 4213
>>
>
> What about
>
> Desired_dat <- dat[match(dat$Interval,sort(dat$Interval)),]
>
dat[order(dat$Interval),]
would be more to the point, but it is a bit fortuitous that it works at
all (split the first group at 50 and you'll see).
This (or at least something like it) should sort according to left
endpoints:
o <- order(as.numeric(sub("-.*", "", dat$Interval)))
dat[o,]
> ?
>
> Paul
>
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