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This tool allows users to calculate statistical features such as mean, median, variance, standard deviation, and skewness, along with the minimum and maximum of a series of numbers in real time without storing them. It can calculate all these features in O(1) space complexity.
This is very useful when dealing with large series of numbers on a resource contrained system. It uses different mathematical logic to keep track of certain variables for its functioning.
pip install streaming-stats
from streaming_stats import StreamingStats
example_series = [4.45, -2, 7.1, -8.7, 3, -2, 45, ,6, -12.3, 53.6, 2.7, 0, 3.6]
object = StreamingStats()
for number in example_series:
object.update(number)
print(object.get_mean())
print(object.get_median())
print(object.get_std())
print(object.get_variance())
print(object.get_min())
print(object.get_max())
print(object.get_skewness())
Other features of the tool includes merging of two different StreamingStats
objects. There can be situation when users would need to find variance (suppose) of the combined series. The merge()
method helps in achieving the same.
object1 = StreamingStats()
object2 = StreamingStats()
for number in series1:
object1.update(number)
for number in series2:
object.update(number)
merged_object = object1.merge(object2)
print(merged_object.get_mean())
print(merged_object.get_median())
print(merged_object.get_std())
print(merged_object.get_variance())
print(merged_object.get_min())
print(merged_object.get_max())
print(merged_object.get_skewness())
Note that the
example_series
list was created just for demonstration. Users don't need to have the numbers of the series stored anywhere. The numbers can be added to theStreamingStats
object as soon as it is recieved.
FAQs
Statistics calculator of a series in O(1) space complexity
We found that streaming-stats demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
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