[R] conditional subset and reorder dataframe rows

Hi List I have a dataframe (~1,200,000 rows deep) and I'd like to conditionally reorder groups of rows in this dataframe. I would like to reorder any rows where the Chr.Strand column contains a '-' but reorder within subsets delineated by the Probe.Set.Name column. # toy example

Re: [R] conditional subset and reorder dataframe rows

looking for. A.K. - Original Message - From: Iain Gallagher iaingallag...@btopenworld.com To: r-help r-help@r-project.org Cc: Sent: Friday, July 20, 2012 7:40 AM Subject: [R] conditional subset and reorder dataframe rows Hi List I have a dataframe (~1,200,000 rows deep) and I'd like