Marc Kelechava marcmuon
marcmuon
/ snowflake_hour_floor.sql
Created
September 1, 2021 20:07
Floor function on Hour in Snowflake
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| select GETDATE() --2021-09-01 19:35:22 | |
| select time_slice(getdate()::timestamp_ntz, 1, 'HOUR') --2021-09-01 19:00:00 |
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| def fib_to(n): | |
| fibs = [0, 1] | |
| for i in range(2, n+1): | |
| fibs.append(fibs[-1] + fibs[-2]) | |
| return fibs | |
| print(fib_to(40000)[33399]) |
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| import numpy as np | |
| def ecdf(sample): | |
| n = len(sample) | |
| x = np.sort(sample) | |
| y = np.arange(1, len(x)+1) / n | |
| return x, y |
marcmuon
/ derivative.py
Last active
October 26, 2018 22:04
Derivative Calculation in Python - example using f'(1/x)
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| def derivative(f, x): | |
| h = 0.00000001 | |
| return (f(x+h) - f(x)) / h | |
| x=10 | |
| approx_derivative = derivative(lambda x: 1/x, x) | |
| actual = -1/(x*x) | |
| print('approx:', approx_derivative,', actual:', actual) |