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RfastOfficial / Rfast

A collection of Rfast functions for data analysis. Note 1: The vast majority of the functions accept matrices only, not data.frames. Note 2: Do not have matrices or vectors with have missing data (i.e NAs). We do no check about them and C++ internally transforms them into zeros (0), so you may get wrong results. Note 3: In general, make sure you give the correct input, in order to get the correct output. We do no checks and this is one of the many reasons we are fast.
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Argument `n` for rowMins and rowMaxs #15

Closed thiagoveloso closed 4 years ago

thiagoveloso commented 4 years ago

Thanks for the wonderful package.

Currently, rowMins and rowMaxs return respectively only the minimum and maximum values for each row.

It would be great to add an n argument to those functions, which would return the n (for example 5) smallest and largest numbers for each row.

As a result of the example above, 5 values would be returned for each row (and not just the 5th value). Does that feature sound useful for you guys as well?

ManosPapadakis95 commented 4 years ago

Actually you want a partial sorting. I already have this algorithm in colSort but not in cran yet. You can see a similar usage in Sort using argument partial.

thiagoveloso commented 4 years ago

Actually you want a partial sorting. I already have this algorithm in colSort but not in cran yet. You can see a similar usage in Sort using argument partial.

Cool! Looking forward to testing that functionality. Any ideia on when will it be on Cran?

ManosPapadakis95 commented 4 years ago

Unfortunately, in a few months.

ManosPapadakis95 commented 4 years ago

Done. But this feature will be added in colnth and rownth functions choosing the number of the returned values. For matter of speed the values will be sorted.