k-sunakoの技術ログ

#+header: :file "images/v0ud5YVim1jv4.png"
#+header: :results raw :fit yes :border 0cm
#+header: :imagemagick t
#+header: :iminoptions -density 400
#+header: :imoutoptions -geometry 200 -flatten
#+begin_src latex :results file
  \begin{tikzpicture}
    \draw[thin,dotted] (-3,-3) grid (3,3);
    \draw[->] (-3,0) -- (3,0);
    \draw[->] (0,-3) -- (0,3);
  \end{tikzpicture}
#+end_src

import numpy as np

def D(size, low=0, high=1000000):
    return np.random.randint(X_low, X_high, size)
def P(n, low=0, high=1000000):
    return n / (X_high - X_low)

m = 2000
r = 10
C = D((r, 10))

N = 100
lst_sum_P = []
for _ in range(N):
    sum_P = 0
    S = D(m)
    for i in range(r):
        if np.intersect1d(S, C[i]).size == 0:
            pass
        else:
            sum_P += P(C[i].size)
    lst_sum_P.append(sum_P)

np.mean(lst_sum_P) <= r / (m * np.e)

import { createLogger, format, transports } from 'winston';

const { combine, timestamp, errors, printf, cli, metadata } = format;


const myFormat = printf(({ level, message, metadata }) => {
  if (metadata && metadata.stack) {
    return `${metadata.timestamp} ${level}: ${metadata.stack}`;
  } else {
    return `${metadata.timestamp} ${level}: ${message}`;
  }
});

export const logger = createLogger({
  format: combine(
    errors({ stack: true }),
    timestamp(),
    cli(),
    metadata(),
    myFormat,
  ),
  transports: [new transports.Console()],
});

import {logger} from '../../src/logger.js'
import { test } from 'vitest'


test("winstonの通常ログ", () => {
  logger.info("これはINFOです。");
});


test("winstonの例外時にスタックトレースを表示する", () => {
  try {
    throw new RangeError("これは範囲エラーです.");
  }catch(err) {
    logger.error(err);
  }
});

 RUN  v2.1.0 /home/hoge/projects/hello_typescript

stdout | __tests__/unit/logger.test.ts > winstonの通常ログ
2024-11-04T10:58:55.786Z info:     これはINFOです。

stdout | __tests__/unit/logger.test.ts > winstonの例外時にスタックトレースを表示する
2024-11-04T10:58:55.789Z error: RangeError: これは範囲エラーです.
    at /home/hoge/projects/hello_typescript/__tests__/unit/logger.test.ts:12:11
    at file:///home/hoge/projects/hello_typescript/node_modules/@vitest/runner/dist/index.js:146:14
    at file:///home/hoge/projects/hello_typescript/node_modules/@vitest/runner/dist/index.js:529:11
    at runWithTimeout (file:///home/hoge/projects/hello_typescript/node_modules/@vitest/runner/dist/index.js:61:7)
    at runTest (file:///home/hoge/projects/hello_typescript/node_modules/@vitest/runner/dist/index.js:982:17)
    at processTicksAndRejections (node:internal/process/task_queues:95:5)
    at runSuite (file:///home/hoge/projects/hello_typescript/node_modules/@vitest/runner/dist/index.js:1131:15)
    at runFiles (file:///home/hoge/projects/hello_typescript/node_modules/@vitest/runner/dist/index.js:1188:5)
    at startTests (file:///home/hoge/projects/hello_typescript/node_modules/@vitest/runner/dist/index.js:1197:3)
    at file:///home/hoge/projects/hello_typescript/node_modules/vitest/dist/chunks/runBaseTests.9YDrdSI4.js:130:11

 ✓ __tests__/unit/logger.test.ts (2)
 ✓ __tests__/unit/main.test.ts (3)
 ✓ build/__tests__/unit/main.test.js (2)

 Test Files  3 passed (3)
      Tests  7 passed (7)
   Start at  19:58:55
   Duration  209ms (transform 52ms, setup 0ms, collect 95ms, tests 12ms, environment 0ms, prepare 141ms)

import math
import numpy as np

def calc_sin_Maclaurin(x, n):
    ans = []
    for k in range(n):
        term = (-1)**k * x**(2*k+1) / math.factorial(2*k+1)
        ans.append(term)
    return sum(ans), ans
np.sin(np.sqrt(2)), calc_sin_Maclaurin(np.sqrt(2), 10)[0]

import matplotlib.pyplot as plt
import numpy as np

vfunc = np.vectorize(lambda x: calc_sin_Maclaurin(x, 10)[0])

fig, ax = plt.subplots(1, 1)
x = np.linspace(0, 10, 1000)
ax.plot(x, vfunc(x), label="Maclaurin(x, 10)")
ax.plot(x, np.sin(x), label="sin(x)")
ax.set_ylim(-2, 2)
plt.legend()
fig.savefig(outfile)
outfile

calc_sin_Maclaurin(np.sqrt(2), 5)[1]