Scipy是一个开源的Python库,用于科学跟工程打算。它供给了广泛的模块跟函数,用于数学、科学跟工程范畴的打算。经由过程利用Scipy,你可能轻松地履行数值打算、统计分析、优化、旌旗灯号处理、图像处理等任务。本文将供给50个实战代码示例,帮助你控制Scipy在数据分析中的利用。
在开端实战代码示例之前,让我们先回想一下Scipy的一些基本知识。
pip install scipy
import scipy
from scipy.optimize import fsolve
def equation(x):
return x**2 - 2
solution = fsolve(equation, 1.5)
print(solution)
from scipy.integrate import quad
def integrand(x):
return x**2
result, error = quad(integrand, 0, 1)
print(result)
from scipy.stats import norm
data = [1, 2, 3, 4, 5]
mean, std = norm.stats(data)
print(mean, std)
from scipy.stats import f
group1 = [1, 2, 3, 4, 5]
group2 = [5, 4, 3, 2, 1]
f_value, p_value = f.cdf(group1, dfn=4, dfd=4, x=(sum(group1) - sum(group2)) / 2)
print(f_value, p_value)
from scipy.optimize import least_squares
def objective(x):
return x**2 - 1
x0 = [1]
res = least_squares(objective, x0)
print(res.x)
import numpy as np
from scipy.optimize import minimize
def gradient(x):
return 2*x - 1
res = minimize(gradient, 0, method='BFGS')
print(res.x)
from scipy.signal import fft
data = np.array([1, 2, 3, 4, 5])
fft_result = fft(data)
print(fft_result)
from scipy.signal import butter, filtfilt
def butter_lowpass(cutoff, fs, order=5):
nyq = 0.5 * fs
normal_cutoff = cutoff / nyq
b, a = butter(order, normal_cutoff, btype='low', analog=False)
return b, a
def butter_lowpass_filter(data, cutoff, fs, order=5):
b, a = butter_lowpass(cutoff, fs, order=order)
y = filtfilt(b, a, data)
return y
filtered_data = butter_lowpass_filter(data, cutoff=1, fs=100, order=5)
print(filtered_data)
from scipy import ndimage
from PIL import Image
img = Image.open('image.jpg')
img_array = np.array(img)
print(img_array)
normalized_img = ndimage.normalize(img_array, range=(0, 255))
print(normalized_img)
经由过程以上50个实战代码示例,你可能控制Scipy在数据分析中的利用。这些示例涵盖了数值打算、统计分析、优化、旌旗灯号处理跟图像处理等多个范畴。经由过程进修跟现实这些代码示例,你可能晋升你的数据分析技能,并在现实项目中利用Scipy。