#bp神经网络分类红酒正确率100

#bp神经网络分类红酒正确率100

%预测值为100%

%希望大神看下 哪错了
 clc;clear;close all;
load('wine.data')
%设置训练数据和测试数据
[m,n]=size(wine);
train_num=round(0.6*m); 
output1=wine(:,1);%类型
output=zeros(178,3);%弄一个空的矩阵
c=output1(108:end,:);

%%
for i=1:178
   switch output1(i)
        case 1
           output(i,:)=[1 0 0];
        case 2
           output(i,:)=[0 1 0];
        case 3
           output(i,:)=[0 0 1];
    end
end
x_train=wine(1:train_num,2:n);
y_train=output(1:train_num,:);%取最后一列的数据为训练集

%测试数据
x_test=wine(train_num+1:end,2:n);%取训练集
y_test=output(train_num+1:end,:);%取训练集y
x_train=x_train';%bp神经网络是以列进行运算的
y_train=y_train';
x_test=x_test';
[x_train_regular,x_train_maxmin] = mapminmax(x_train);
[y_train_regular,y_train_maxmin] = mapminmax(y_tr