Witryna26 maj 2024 · 报错:. return 1.0/ ( 1+ math.exp (-intX)) TypeEr ror: only length - 1 arrays can be converted to Python scalars. 将 math.exp 改为 numpy 的方法 numpy.exp. im port numpy as np. de f sigmoid ( self, intX): return 1.0/ ( 1+ np.exp (-intX)) 也可以在文件头添加 from numpy import * ,就可以直接用 exp (-intX) 了. 详见 python ... Witryna18 gru 2024 · 2 回答 name 'classifier' is not defined 1 回答 ‘’self‘’ is not defined name什么鬼? 1 回答 跟着老师打的,可是为什么会报错NameError: name 'X' is not defined?
Logistic Regression - GitHub Pages
Witrynapython - Keras 教程错误 : NameError: name 'layers' is not defined. 我正在尝试关注 this Keras tutorial,但是在使用命令 python3 test.py 编译时遇到如下错误: Traceback (most recent call last ): File "test.py", line 13, in < module > layers.Dense ( 64, activation= 'sigmoid' ) NameError: name 'layers' is not defined. Witryna4 kwi 2024 · How many terms do you want for the sequence? 5 Traceback (most recent call last): File "fibonacci.py", line 18, in n = calculate_nt_term(n1, n2) NameError: name … scoundrel\u0027s hy
Sigmoid function - Wikipedia
Witryna13 kwi 2024 · 逻辑回归不是一个回归的算法,逻辑回归是一个分类的算法,因为逻辑回归算法是基于多元线性回归的算法。而正因为此,逻辑回归这个分类算法是线性的分类器,所以为有监督的。逻辑回归一般用于o-1分布的有监督分类问题,softmax用于多项式分类。逻辑多项式回归一般用于医疗影橡,如病例所属 ... Witryna1.1 - sigmoid function, np.exp() Before using np.exp(), you will use math.exp() to implement the sigmoid function. You will then see why np.exp() is preferable to math.exp(). Exercise: Build a function that returns the sigmoid of a real number x. Use math.exp(x) for the exponential function. Using decimal, from decimal import Decimal print (1 / (1 + Decimal (-37).exp ())) you get. Decimal ('0.9999999999999999146695237430') and the resulting sigmoid function 1/ (1+D (37).exp ()) for -37 gives. Decimal ('8.533047625744065066149031992E-17') which is not zero. Another solution is to use another sigmoid function, different from the one ... scoundrel\u0027s ht