(python 3) import numpy from scipy import sparse as S from matplotlib import pyplot as plt from scipy.sparse.csr import csr_matrix import pandas def normalize(x): V = x.copy() V -= x.min(axis=1).reshape(x.shape[0],1) V /= V.max(axis=1).reshape(x.shap
BP神经网络 function [W,err]=BPTrain(data,label,hiddenlayers,nodes,type) %Train the bp artial nueral net work %input data,label,layers,nodes,type %data:dim*n %label:1*n %layers:m:number of hidden layers %nodes:num_1;num_2...num_m %type==1:create and train
题目太长了!下载地址[传送门] 第1题 简述:识别图片上的数字. import numpy as np import scipy.io as scio import matplotlib.pyplot as plt import scipy.optimize as op #显示图片数据 def displayData(X): m = np.size(X, 0) #X的行数,即样本数量 n = np.size(X, 1) #X的列数,即单个样本大小 example_width = int(np.r