
Hello R users,


I have recently begun a project to analyze a large data set of approximately 1.5 million rows it also has 9 columns. My objective consists of locating particular subsets within this data ie. take all rows with the same column 9 and perform a function on that subset. It was suggested to me that i use the ddply() function from the Pylr package. Any advice would be greatly appreciated 


Thanks much,

Dylan


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