clc%清除命令窗口变量
clear%清除工作空间变量
close all%关闭FIGURE图像
[a,ax,ay] = xlsread('月光燃尽.xlsx');
rng(3)
num = a(:,5:end);
num1 = zeros(230,30);
num2 = zeros(46,30);
for ii = 1:46
num1((ii-1)*5+1:ii*5,:) = num((ii-1)*6+1:(ii-1)*6+5,:);
num2(ii,:) = num(ii*6,:);
end
input_train=num1(:,2:30)';%训练数据的输入数据
output_train=num1(:,1)';%训练数据的输出数据4
input_test=num2(:,2:30)';%测试数据的输入数据
output_test=num2(:,1)'; %测试数据的输出数据
%选连样本输入输出数据归一化
[inputn,inputps]=mapminmax(input_train,-1,1);%训练数据的输入数据的归一化
[outputn,outputps]=mapminmax(output_train,-1,1);%训练数据的输出数据的归一化de
%% BP网络训练
% %初始化网络结构
net=newff(inputn,outputn,[10],{'logsig','tansig'},'trainlm');
%net.trainParam.max_fail = 950;
net.trainParam.epochs=500;%最大迭代次数
net.trainParam.lr=0.69;%学习率
net.trainParam.goal=0.001;%学习目标
net.trainParam.mu=0.1;%
%网络训练
net=train(net,inputn,outputn);
%% BP网络预测
%预测数据归一化
inputn_test=mapminmax('apply',input_test,inputps);
%网络预测输出
an=sim(net,inputn_test);
%网络输出反归一化-+
BPoutput=(mapminmax('reverse',an,outputps));
% BPoutput = BPoutput-1;
R2 = R_2(output_test,BPoutput);
[MSE0, RMSE0, MBE0, MAE0 ] =MSE_RMSE_MBE_MAE(output_test,BPoutput);
% save maydata.mat net inputps outputps
%% 结果分析
figure
plot(BPoutput(1,:),'r-o')%预测的结果数据画图:代表虚线,O代表圆圈标识,G代表绿色
hold on
plot(output_test(1,:),'k-*');%期望数据,即真实的数据画图,-代表实现,*就是代表*的标识
hold on
legend('BP预测输出','期望输出')%标签
title('BP神经网络','fontsize',12)%标题 字体大小为12
ylabel('AHP评分')
set(gca,'fontsize',12)
%预测误差
error=BPoutput-output_test;
figure
plot(error')
ylabel('误差')
result_table = table;
result_table.BPoutput = BPoutput';
result_table.output_test = output_test';
result_table.error = error';
writetable(result_table,'./结果.csv')
result_table1 = table;
result_table1.lr=0.69;
result_table1.epochs=500;%最大迭代次数
result_table1.goal=0.01;%学习目标
result_table1.R2 = R2;
writetable(result_table1,'./结果2.csv')
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基于BP神经网络的回归分析,基于优化动量因子的BP神经网络,基于优化学习率的BP神经网络,基于优化隐藏层神经元的bp神经网络
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基于MATLAB编程,基于BP神经网络的回归分析,基于优化动量因子的BP神经网络,基于优化学习率的BP神经网络,基于优化隐藏层神经元的bp神经网络,优化方法采用网格优化方法,代码完整,包含数据,有注释,方便扩展应用 1,如有疑问,不会运行,可以私信, 2,需要创新,或者修改可以扫描二维码联系博主, 3,本科及本科以上可以下载应用或者扩展, 4,内容不完全匹配要求或需求,可以联系博主扩展。
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