scipy.curve_fit()返回多行
我是Python的新手,并试图使用以下代码安装数据集发行。实际数据是包含两个预测的市场价格和实际市场价格的列表。而且我试图使用scipy.curve_fit()
,但它给了我在同一位置绘制的许多行。任何帮助都将受到赞赏。
# import the necessary modules and define a func.
from scipy.optimize import curve_fit
from matplotlib import pyplot as plt
def func(x, a, b, c):
return a * x** b + c
# my data
pred_data = [3.0,1.0,1.0,7.0,6.0,1.0,7.0,4.0,9.0,3.0,5.0,5.0,2.0,6.0,8.0]
actu_data =[ 3.84,1.55,1.15,7.56,6.64,1.09,7.12,4.17,9.45,3.12,5.37,5.65,1.92,6.27,7.63]
popt, pcov = curve_fit(func, pred_data, actu_data)
#adjusting y
yaj = func(pred_data, popt[0],popt[1], popt[2])
# plot the data
plt.plot(pred_data,actu_data, 'ro', label = 'Data')
plt.plot(pred_data,yaj,'b--', label = 'Best fit')
plt.legend()
plt.show()
I am new to python and was trying to fit dataset distribution using the following code. The actual data is a list that contains two columns- predicted market price and actual market price. And I was trying to use scipy.curve_fit()
but it gave me many lines plotted at the same place. Any help is appreciated.
# import the necessary modules and define a func.
from scipy.optimize import curve_fit
from matplotlib import pyplot as plt
def func(x, a, b, c):
return a * x** b + c
# my data
pred_data = [3.0,1.0,1.0,7.0,6.0,1.0,7.0,4.0,9.0,3.0,5.0,5.0,2.0,6.0,8.0]
actu_data =[ 3.84,1.55,1.15,7.56,6.64,1.09,7.12,4.17,9.45,3.12,5.37,5.65,1.92,6.27,7.63]
popt, pcov = curve_fit(func, pred_data, actu_data)
#adjusting y
yaj = func(pred_data, popt[0],popt[1], popt[2])
# plot the data
plt.plot(pred_data,actu_data, 'ro', label = 'Data')
plt.plot(pred_data,yaj,'b--', label = 'Best fit')
plt.legend()
plt.show()
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scipy
不会产生多行,奇怪的输出是由您将未分类数据显示给matplotlib
的方式引起的。对X值进行排序,然后将获得所需的输出:您的拟合功能的更顺畅表示:
Scipy
doesn't produce multiple lines, the strange output is caused by the way you present your unsorted data tomatplotlib
. Sort your x-values and you get the desired output:A better way is of course to define an evenly-spaced high resolution array for your x-values and calculate the fit for this array to have a smoother representation of your fit function: