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I agree with most of what they say here - except using data.table. I much prefer using data.table structures with dplyr a far simpler more familiar syntax. Indeed data.table - the object implementation - is brilliant and should just replace data.frame ...if that were possible.

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The real problem with data.table is that it has too much magic. It's great for interactive use, but it's hard to program to.

If, for example, you want to aggregate a table using a list of supplied variable names, like if you wanted to abstract out some aggregation code, you need to descend into horrible quote/substitute/etc. hackery to make it work.

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