Lin Kao-Yuan mosdeo
mosdeo
/ 04_conditional_convolution.py
Created
March 9, 2023 09:27
用 NumPy 向量化加速 Python：條件式卷積，變快 250 倍
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| import numpy as np | |
| import cv2 as cv | |
| import time | |
| # Python 版本: 3.11 | |
| # NumPy 版本: 1.24.1 | |
| # 日期: 2023-3-9 | |
| # 作者: Lin Kao-Yuan 林高遠 | |
| # 知乎: www.zhihu.com/people/lin-kao-yuan | |
| # 網站: web.ntnu.edu.tw/~60132057A | |
| # Github: github.com/mosdeo |
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| import numpy as np | |
| import cv2 as cv | |
| import time | |
| # Python 版本: 3.11 | |
| # NumPy 版本: 1.24.1 | |
| # 日期: 2023-3-8 | |
| # 作者: Lin Kao-Yuan 林高遠 | |
| # 知乎: www.zhihu.com/people/lin-kao-yuan | |
| # 網站: web.ntnu.edu.tw/~60132057A | |
| # Github: github.com/mosdeo |
mosdeo
/ 02_remove_element_vectorlize.py
Last active
March 8, 2023 08:11
用 NumPy 向量化加速 Python：從3千萬剩男中找出比我高變快 16 倍
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| import numpy as np | |
| import time | |
| # Python 版本: 3.11 | |
| # NumPy 版本: 1.24.1 | |
| # 日期: 2023-3-8 | |
| # 作者: Lin Kao-Yuan 林高遠 | |
| # 知乎: www.zhihu.com/people/lin-kao-yuan | |
| # 網站: web.ntnu.edu.tw/~60132057A | |
| # Github: github.com/mosdeo |
mosdeo
/ 01_area_vectorlize.py
Last active
March 8, 2023 08:00
用 NumPy 向量化加速 Python：千萬級矩形面積計算變快 16~177 倍
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| import numpy as np | |
| import time | |
| # Python 版本: 3.11 | |
| # NumPy 版本: 1.24.1 | |
| # 日期: 2023-3-5 | |
| # 作者: Lin Kao-Yuan 林高遠 | |
| # 知乎: www.zhihu.com/people/lin-kao-yuan | |
| # 網站: web.ntnu.edu.tw/~60132057A | |
| # Github: github.com/mosdeo |
mosdeo
/ gist:e889ea8c929f3f60b4b780e4326206c8
Created
May 15, 2022 08:41
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| import numpy as np | |
| v1 = np.array([100, 50, 20]) | |
| p1 = np.array([30, 78, 21]) | |
| p2 = np.array([-67, 98, 12]) | |
| p1p2 = p2-p1 | |
| # 求 v1 與 p1p2 夾角 | |
| v1_p1p2_angle = np.arccos(np.dot(v1, p1p2)/(np.linalg.norm(v1)*np.linalg.norm(p1p2))) |
mosdeo
/ diff_iphone13_band_hk_mo.py
Created
September 15, 2021 09:25
根據Apple官網數據，比較iPhone13的hk與mo版頻段是否相同？
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| # https://www.apple.com/hk/iphone-13/specs/ | |
| # https://www.apple.com/mo/iphone-13/specs/ | |
| A2628_hk = \ | |
| "5G NR (頻段 n1、n2、n3、n5、n7、n8、n12、n20、n25、n28、n30、n38、n40、n41、n48、n66、n77、n78、n79)\ | |
| FDD‑LTE (頻段 1、2、3、4、5、7、8、12、13、17、18、19、20、25、26、28、30、32、66)\ | |
| TD‑LTE (頻段 34、38、39、40、41、42、46、48)\ | |
| UMTS/HSPA+/DC-HSDPA (850、900、1700/2100、1900、2100 MHz)\ | |
| GSM/EDGE (850、900、1800、1900 MHz)" | |
| A2628_mo = \ |
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| package main | |
| import ( | |
| "fmt" | |
| "math" | |
| ) | |
| func q(x float64) float64 { | |
| return 1 / (x * math.Pow(1+Ln(x), 0.5)) | |
| } |
mosdeo
/ gist:bdaea4a8a8dbc715b15f78e55ba836d6
Last active
November 7, 2019 08:44
Add Two Numbers 第一個通過版本（邊加邊進位）
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| /** | |
| * Definition for singly-linked list. | |
| * type ListNode struct { | |
| * Val int | |
| * Next *ListNode | |
| * } | |
| */ | |
| func addTwoNumbers(l1 *ListNode, l2 *ListNode) *ListNode { | |
| var firstNode *ListNode = new(ListNode) |
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| /** | |
| * Definition for singly-linked list. | |
| * type ListNode struct { | |
| * Val int | |
| * Next *ListNode | |
| * } | |
| */ | |
| func addTwoNumbers(l1 *ListNode, l2 *ListNode) *ListNode { | |
| // Convert ListNodes to Int |
mosdeo
/ LINQ_GroupBy_Max_Distinct.cs
Created
September 27, 2018 06:31
Note: C# DataTable GroupBy().Max() + GroupBy().Distinct()
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| DataTable rightDt = | |
| dataTable.AsEnumerable() | |
| .GroupBy(row => | |
| {// 相同經緯度歸納為一組 | |
| return new Tuple<double, double>(Convert.ToDouble(row["lat"]), Convert.ToDouble(row["lon"])); | |
| }) | |
| .Select(item => | |
| { | |
| DataRow row = dataTable.NewRow(); | |
| row["lat"] = item.Key.Item1; |
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