如何在python中拟合高斯曲线? [英] How can I fit a gaussian curve in python?
问题描述
给了我一个数组,当我绘制它时,我得到了带有一些噪声的高斯形状。我想适合高斯人。这是我已经拥有的,但是当我绘制它时,我没有得到拟合的高斯,而是得到一条直线。我已经尝试了许多不同的方法,但我只是想不通。
random_sample = norm.rvs(h)
参数= norm.fit(h)
fit_pdf = norm.pdf(f,loc = parameters [0],scale = parameters [1])$ b
$ b normal_pdf = norm.pdf(f)
plt.plot(f,fitted_pdf, green)
plt.plot(f,normal_pdf, red)
plt.plot(f,h)
plt.show()
您可以使用
蓝色框是数据的直方图,绿线是具有拟合参数的高斯。
I'm given an array and when I plot it I get a gaussian shape with some noise. I want to fit the gaussian. This is what I already have but when I plot this I do not get a fitted gaussian, instead I just get a straight line. I've tried this many different ways and I just can't figure it out.
random_sample=norm.rvs(h)
parameters = norm.fit(h)
fitted_pdf = norm.pdf(f, loc = parameters[0], scale = parameters[1])
normal_pdf = norm.pdf(f)
plt.plot(f,fitted_pdf,"green")
plt.plot(f, normal_pdf, "red")
plt.plot(f,h)
plt.show()
You can use fit
from scipy.stats.norm
as follows:
import numpy as np
from scipy.stats import norm
import matplotlib.pyplot as plt
data = np.random.normal(loc=5.0, scale=2.0, size=1000)
mean,std=norm.fit(data)
norm.fit
tries to fit the parameters of a normal distribution based on the data. And indeed in the example above mean
is approximately 5 and std
is approximately 2.
In order to plot it, you can do:
plt.hist(data, bins=30, normed=True)
xmin, xmax = plt.xlim()
x = np.linspace(xmin, xmax, 100)
y = norm.pdf(x, mean, std)
plt.plot(x, y)
plt.show()
The blue boxes are the histogram of your data, and the green line is the Gaussian with the fitted parameters.
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