January 2017
Beginner to intermediate
312 pages
7h 3m
Korean
Content preview from 밑바닥부터 시작하는 딥러닝
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124
밑바닥부터 시작하는 딥러닝
4.3.2
수치 미분의 예
앞 절의 수치 미분을 사용하여 간단한 함수를 미분해봅시다. 우선 다음과 같은
2
차 함수입
니다.
y
=
0
.
01
x
2
+
0
.
1
x
[식 4.5 ]
[식
4
.
5
]를 파이썬으로 구현하면 다음과 같이 됩니다.
def function
_
1
(
x
):
return 0
.
01
*
x
**
2
+
0
.
1
*
x
이어서 이 함수를 그려봅시다.
import numpy as np
import matplotlib
.
pylab as plt
x
=
np
.
arange
(
0
.
0
,
20
.
0
,
0
.
1
)
#
0
에서
20
까지
0
.
1
간격의 배열
x
를 만든다.
y
=
function
_
1
(
x
)
plt
.
xlabel
("
x
")
plt
.
ylabel
("
f
(
x
)")
plt
.
plot
(
x
,
y
)
plt
.
show
()
그림
4-6
식
f
(
x
) =
0
.
01
x
2
+
0
.
1
x
의 그래프
그럼
x
=
5
일 때와
10
일 때 이 함수의 미분을 계산해봅시다.
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.