Thomas Nield thomasnield
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| import numpy as np | |
| def log(base: float, n: float): | |
| x = 1.0 | |
| best_loss = 1_000_000.0 | |
| for _ in range(100_000): | |
| random_adj = np.random.normal() | |
| x += random_adj | |
| new_loss = ((base ** x) - n) ** 2 |
thomasnield
/ binomial_distribution_from_scratch.py
Created
October 20, 2019 01:40
Binomial Distribution from Scratch
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| import plotly.express as px | |
| # Factorials multiply consecutive descending integers down to 1 | |
| # EXAMPLE: 5! = 5 * 4 * 3 * 2 * 1 | |
| def factorial(n: int): | |
| f = 1 | |
| for i in range(n): | |
| f *= (i + 1) | |
| return f |
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| from sympy import integrate, Symbol | |
| x = Symbol('x') | |
| # Calculate the integral function | |
| integral = integrate(2 * x, x) | |
| print(integral) # prints x**2 | |
| # Calculate the area under 2x between 0 and 2 | |
| area = integrate(2 * x, (x, 0, 2)) |
thomasnield
/ approximate_integration_from_scratch.py
Created
October 21, 2019 16:50
Approximating Integrals from Scratch
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| # Got this from https://www.kkhaydarov.com/approximate-integration-with-python/ | |
| def approximate_integral(a, b, n, f, rule="midpoint"): | |
| delta_x = (b - a) / n | |
| total_sum = 0 | |
| if rule == "midpoint": | |
| for i in range(1, n + 1): | |
| midpoint = 0.5 * (2 * a + delta_x * (2 * i - 1)) | |
| total_sum += f(midpoint) |
thomasnield
/ crude_quantile_approximation_from_scratch.py
Created
October 21, 2019 18:56
Quantile approximation from scratch
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| import random | |
| import plotly.express as px | |
| # Got this from https://www.kkhaydarov.com/approximate-integration-with-python/ | |
| def approximate_integral(a, b, n, f, rule="midpoint"): | |
| delta_x = (b - a) / n | |
| total_sum = 0 | |
| if rule == "midpoint": |
thomasnield
/ simple_dji_tello_control.py
Last active
February 11, 2022 03:56
Simple DJI Tello Drone Control
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| # | |
| # Tello Python3 Control Demo | |
| # | |
| # http://www.ryzerobotics.com/ | |
| # | |
| # Commands: https://dl-cdn.ryzerobotics.com/downloads/tello/0228/Tello+SDK+Readme.pdf | |
| # 1/1/2018 | |
| import threading | |
| import socket |
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| fun toCamelCase(s: String): String { | |
| val parts = s.split("_".toRegex()).dropLastWhile { it.isEmpty() }.toTypedArray() | |
| var camelCaseString = "" | |
| for ((i,part) in parts.withIndex()) { | |
| camelCaseString += part.substring(0, 1).let { if (i == 0) it.toLowerCase() else it.toUpperCase() } + part.substring(1).toLowerCase() | |
| } | |
| return camelCaseString | |
| } |
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| fun String.smartLocalDateTimeParse(): LocalDateTime { | |
| val dtmStr = replace("/", "-") | |
| val (dt,tm) = dtmStr.split(" ") | |
| return dt.smartLocalDateParse().atTime(tm.smartLocalTimeParse()) | |
| } | |
| fun String.smartLocalDateParse(): LocalDate { |
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| package com.swa.np.common.util | |
| import org.apache.commons.csv.CSVFormat | |
| import org.apache.commons.csv.CSVRecord | |
| import java.io.FileReader | |
| object CSVHelper { | |
| // Helpful docs: https://commons.apache.org/proper/commons-csv/user-guide.html |
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| <head> | |
| <!-- Plotly.js --> | |
| <script src="https://cdn.plot.ly/plotly-latest.min.js"></script> | |
| </head> | |
| <body> | |
| <div id="myDiv"><!-- Plotly chart will be drawn inside this DIV --></div> |