$ sudo apt install default-jdk
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import numpy as np | |
import networkx as nx | |
import matplotlib.pyplot as plt | |
def back_substitution(U,Y): | |
''' | |
back_substitution(U,Y) | |
back_substitution은 역치환을 수행하여 UX = Y의 해를 구합니다. | |
U가 전체 순위인지 확인하기 위해 오류를 검사하지 않습니다. |
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from IPython.display import set_matplotlib_formats, display | |
import pandas as pd | |
import numpy as np | |
import matplotlib.pyplot as plt | |
import mglearn | |
from mglearn import plot_helpers | |
from cycler import cycler | |
set_matplotlib_formats('pdf', 'png') | |
plt.rcParams['savefig.dpi'] = 300 |
$ sudo apt install postgresql postgresql-contrib
$ sudo service postgresql start
$ sudo -i -u postgres # postgres에 접속
# create user sd password 'qwer1234' superuser;
# create database sd owner sd;
$ sudo vi vi /etc/postgresql/14/main/pg_hba.conf => `peer`을 `md5`로 수정
$ sudo apt-get -y install postgresql-14-cron
$ sudo vi /etc/postgresql/14/main/postgresql.conf
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using Xunit; | |
using DSWithAlgo.DS.LinkedList.SingleLinkedList; | |
namespace DSWithAlgo.Tests.LinkedList | |
{ | |
public static class LinkedListTests | |
{ | |
[Fact] | |
public static void Add() | |
{ |
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import matplotlib.pyplot as plt | |
import numpy as np | |
import time | |
def generate_data(): | |
rng = np.random.RandomState(1) | |
X = 10 * rng.rand(200) | |
y = 2 * X - 5 + rng.randn(200) | |
return X, y |
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import numpy as np | |
def compute_error_for_line_given_points(b, m, points): | |
total_error = 0 | |
for i in range(0, len(points)): | |
x = points[i, 0] | |
y = points[i, 1] | |
total_error += (y - (m * x + b)) ** 2 | |
return total_error / float(len(points)) |
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