%?bpnntrain??網絡訓練與仿真部分
clear?
clc?

load?featureextract;?
%?調用輸入輸出樣本數據
P_train?=?P（:1:40）;
%P_train：訓練樣本集合
T_train?=?T（:1:40）;
P_test?=?P（:40:56）;
T_test?=?T（:40:56）;

echo?on
net=newff（minmax（P_train）[9?4]{‘tansig‘‘tansig‘‘tansig‘}‘trainlm‘）;?
%newff:建立一個BP網絡
%minmax（P_train）:對神經網絡輸入的最大最小值的限制
%[9?4]:神經網絡的層結構
%{‘tansig‘‘tansig‘‘tansig‘}:神經網絡各層轉移函數
%‘trainlm‘:訓練函數
%?利用工具箱建立前向BP網絡輸入輸出隱層的傳遞函數均為S型的正切函數使用Levenberg-Marquard算法進行訓練
%?隱層設置9個神經元，4個神經元輸出
net?=?init（net）;
%?網絡初始化
[m1n1]=size（net.IW{11}）;
net.IW{11}=0.3*ones（m1n1）;
%?初始化當前輸入層權值
[m2n2]=size（net.LW{21}）;
net.LW{21}=0.3*ones（m2n2）;
%?初始化隱層與輸出層的連接權值
net.trainParam.show=100;?%顯示的間隔次數
net.trainParam.lr=0.01;?%網絡學習速率
net.trainParam.mc=0.9;?%動量因子
net.trainParam.epochs=1000;?%最大訓練次數
net.trai

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2010-02-20?18:14??手寫體數字識別\
?????文件????????1206??2006-12-24?11:04??手寫體數字識別\0.bmp
?????文件????????1206??2006-12-24?11:03??手寫體數字識別\00.bmp
?????文件????????1206??2006-12-24?11:03??手寫體數字識別\000.bmp
?????文件????????1206??2006-12-24?11:03??手寫體數字識別\0000.bmp
?????文件????????1206??2006-12-24?11:04??手寫體數字識別\1.bmp
?????文件????????1206??2006-12-24?11:05??手寫體數字識別\11.bmp
?????文件????????1206??2006-12-22?15:29??手寫體數字識別\111.bmp
?????文件????????1206??2005-01-12?19:36??手寫體數字識別\1111.bmp
?????文件????????1206??2006-12-24?11:04??手寫體數字識別\2.bmp
?????文件????????1206??2006-12-24?11:05??手寫體數字識別\22.bmp
?????文件????????1206??2006-12-22?15:30??手寫體數字識別\222.bmp
?????文件????????1206??2005-01-12?19:36??手寫體數字識別\2222.bmp
?????文件????????1206??2006-12-24?11:04??手寫體數字識別\3.bmp
?????文件????????1206??2006-12-24?11:06??手寫體數字識別\33.bmp
?????文件????????1206??2006-12-24?11:07??手寫體數字識別\333.bmp
?????文件????????1206??2005-01-12?19:36??手寫體數字識別\3333.bmp
?????文件????????1206??2006-12-24?11:04??手寫體數字識別\4.bmp
?????文件????????1206??2006-12-24?11:06??手寫體數字識別\44.bmp
?????文件????????1206??2006-12-24?11:07??手寫體數字識別\444.bmp
?????文件????????1206??2005-01-12?19:36??手寫體數字識別\4444.bmp
?????文件????????1206??2006-12-24?11:05??手寫體數字識別\5.bmp
?????文件????????1206??2006-12-24?11:06??手寫體數字識別\55.bmp
?????文件????????1206??2006-12-24?11:07??手寫體數字識別\555.bmp
?????文件????????1206??2005-01-12?19:36??手寫體數字識別\5555.bmp
?????文件????????1206??2006-12-24?11:05??手寫體數字識別\6.bmp
?????文件????????1206??2006-12-24?11:06??手寫體數字識別\66.bmp
?????文件????????1206??2006-12-24?11:07??手寫體數字識別\666.bmp
?????文件????????1206??2005-01-12?19:36??手寫體數字識別\6666.bmp
?????文件????????1206??2006-12-24?11:05??手寫體數字識別\7.bmp
?????文件????????1206??2006-12-22?15:44??手寫體數字識別\77.bmp
............此處省略92個文件信息