The question has arisen in this discussion (http://www.analyticbridge.com/forum/topics/using-r-for-research). Can anyone provide an example where apply (or tapply, sapply...) is a significant timesaver ?
From "S Programming" (by Venables and Ripley):
It was once true that functions such as sapply concealed explicit loops, but this is no longer the case in the case of the S engines.
Is this al…
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