Sometimes, we want to rank items in an array using Python NumPy, without sorting array twice.
In this article, we’ll look at how to rank items in an array using Python NumPy, without sorting array twice.
How to rank items in an array using Python NumPy, without sorting array twice?
To rank items in an array using Python NumPy, without sorting array twice, we can use the SciPy rankdata function.
For instance, we write
from scipy.stats import rankdata
a = [4, 2, 7, 1]
ranks = rankdata(a)
to call rankdata with list a to return a list with the ranks of the values in a.
The ranks for floats by default.
Conclusion
To rank items in an array using Python NumPy, without sorting array twice, we can use the SciPy rankdata function.
