Both R and pandas force you to wrap your problem around dataframes and vectorized operations. But sometimes you really do just want to write a loop that iterat

Both R and pandas force you to wrap your problem around dataframes and vectorized operations. But sometimes you really do just want to write a loop that iterates over the data. Right now the only way to do that without significant performance costs is to drop down into C or avoid the problem completely by using Julia. Having worked with both R and Python on large datasets, I think both languages are really easy until they aren’t. Eventually you hit a performance wall.