[R] sort a data frame according to roman characters

From: Luis Ridao Cruz <Luisr_at_frs.fo>
Date: Tue, 12 Feb 2008 10:36:50 +0000


I have a data frame with one column containing roman numbers The data are not sorted as : I II III IV V VI VII VIII IX   X XI XII XIII XIV XV Using data[order(data$Roman),] does not do the job.

How can this be done?

Thanks in advance.

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