[求助]求高手指点 bp神经网络

zhbrest · 发表于 2006-3-23 16:46

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我想做一个2层的bp神经网络 有自己的用户界面 数据为excel 求高手指点 1.怎么直接在界面下像安装软件一样选择文件路径以及文件。 2.数据中第一行、列的汉字调入后怎么才不会出错。（删除？） 3.我要做的是预测和评价，应该怎么选择训练、学习函数。 4.结果输出到excel或记事本的语句怎么写阿。 ？？？？？？？ 谢谢高手指点 [em24][em24][em24][em24]

happy · 发表于 2006-3-24 08:14

以下是引用zhbrest在2006-3-23 16:46:27的发言：
我想做一个2层的bp神经网络
有自己的用户界面
数据为excel
求高手指点
1.怎么直接在界面下像安装软件一样选择文件路径以及文件。
这个要用Gui实现

2.数据中第一行、列的汉字调入后怎么才不会出错。（删除？）
你用什么读入的？用xlsread的话，自动会忽略

3.我要做的是预测和评价，应该怎么选择训练、学习函数。
这个和的具体问题有关，相关matlab实现可以看《Matlab神经网络应用设计》

4.结果输出到excel或记事本的语句怎么写阿。
保存成excel文件比较麻烦，下面再回复
保存成txt，用fprintf就能实现，具体看帮助

？？？？？？？
谢谢高手指点

happy · 发表于 2006-3-24 08:15

如何将matlab求出的矩阵保存在EXCEL表格中 
转贴Genial分享程序
function xlswrite(m,header,colnames,filename); % xlswrite Easily create an Excel spreadsheet from MATLAB % % xlswrite(m,header,colnames,filename) creates a Microsoft Excel spreadsheet using % the MATLAB ActiveX interface. Microsoft Excel is required. % %Inputs: % m Matrix to write to file % (Optional): % header String of header information. Use cell array for multiple lines % DO NOT USE multiple row character arrays!! % colnames (Cell array of strings) Column headers. One cell element per column % filename (string) Name of Excel file. If not specified, contents will % be opened in Excel. % % ex: % m = rand(100,4); % header = \'my data\'; % %header{1} = \'first line\'; %This will give % %header{2} = \'second line\'; % 2 header lines % colnames = {\'Ch1\',\'Ch2\',\'Ch3\',\'Ch4\'}; % % xlswrite(m,header,colnames,\'myfile.xls\'); % will save the spreadsheet as myfile.xls. The user % will never see Excel % xlswrite(m,header,colnames); % will open Excel with these contents in a new spreadsheet. % % Scott Hirsch % The MathWorks % This is provided free, no warranty, ... % Copied from ActiveX example in documentation [nr,nc] = size(m); if nc>256 error(\'Matrix is too large. Excel only supports 256 columns\'); end; % Open Excel, add workbook, change active worksheet, % get/put array, save. % First, open an Excel Server. Excel = actxserver(\'Excel.Application\'); %If the user does not specify a filename, we\'ll make Excel visible %If they do, we\'ll just save the file and quit Excel without ever making % it visible if nargin<4 set(Excel, \'Visible\', 1); %You might want to hide this if you autosave the file end; % Insert a new workbook. Workbooks = Excel.Workbooks; Workbook = invoke(Workbooks, \'Add\'); % Make the first sheet active. Sheets = Excel.ActiveWorkBook.Sheets; sheet1 = get(Sheets, \'Item\', 1); invoke(sheet1, \'Activate\'); % Get a handle to the active sheet. Activesheet = Excel.Activesheet; %Write header if nargin<2 | isempty(header) nhr=0; elseif iscell(header) nhr = length(header); %Number header rows for ii=1:nhr ActivesheetRange = get(Activesheet,\'Range\',[\'A\' num2str(ii)],[\'A\' num2str(ii)]); set(ActivesheetRange, \'Value\', header{ii}); end; else nhr = 1; %Number header rows ActivesheetRange = get(Activesheet,\'Range\',\'A1\',\'A1\'); set(ActivesheetRange, \'Value\', header); end; %Add column names if nargin>2 & ~isempty(colnames) nhr = nhr + 1; %One extra column name ncolnames = length(colnames); for ii=1:ncolnames colname = localComputLastCol(\'A\',ii); % cellname = [char(double(\'A\')+ii-1) num2str(nhr+1)]; cellname = [colname num2str(nhr)]; ActivesheetRange = get(Activesheet,\'Range\',cellname,cellname); set(ActivesheetRange, \'Value\', colnames{ii}); end; end; % Put a MATLAB array into Excel. FirstRow = nhr+1; %You can change the first data row here. I start right after the headers LastRow = FirstRow+nr-1; FirstCol = \'A\'; %You can change the first column here LastCol = localComputLastCol(FirstCol,nc); ActivesheetRange = get(Activesheet,\'Range\',[FirstCol num2str(FirstRow)],[LastCol num2str(LastRow)]); set(ActivesheetRange, \'Value\', m); % If user specified a filename, save the file and quit Excel if nargin==4 invoke(Workbook, \'SaveAs\', [pwd filesep filename]); invoke(Excel, \'Quit\'); [pathstr,name,ext] = fileparts(filename); disp([\'Excel file \' name \'.xls has been created.\']); end; %Delete the ActiveX object delete(Excel) 
function LastCol = localComputLastCol(FirstCol,nc); % Comput the name of the last column where we will place data %Input % FirstCol (string) name of first column % nc total number of columns to write %Excel\'s columns are named: % A B C ... A AA AB AC AD .... BA BB BC ... FirstColOffset = double(FirstCol) - double(\'A\'); %Offset from column A if nc<=26-FirstColOffset %Easy if single letter %Just convert to ASCII code, add the number of needed columns, and convert back %to a string LastCol = char(double(FirstCol)+nc-1); else ng = ceil(nc/26); %Number of groups (of 26) rm = rem(nc,26)+FirstColOffset; %How many extra in this group beyond A LastColFirstLetter = char(double(\'A\') + ng-2); LastColSecondLetter = char(double(\'A\') + rm-1); LastCol = [LastColFirstLetter LastColSecondLetter]; end;
使用方法：
>> m = rand(100,4); >> header = \'my data\'; >> colnames = {\'Ch1\',\'Ch2\',\'Ch3\',\'Ch4\'}; >> xlswrite(m,header,colnames,\'myfile.xls\'); Excel file myfile.xls has been created.

happy · 发表于 2006-3-24 08:18

方法二 
来自simwe liuxc0206 分享<PRE>function eOut = table2excel(varargin)
% TABLE2EXCEL is a special function is used to insert data to excell
% files.
% inputs :
% 1. argument should be either a filename or
% 2. argument is a struct of cell arrays or a string
%
% Example:
% xtable.Data = {'a','b','c'};
% xtable.Labels = {'label1','label2','label3'};
% xtable.SeparationStr = '%%%'; % Can be empty
% xtable.MergeWidth = 2;
% xtable.Group = 'Table 1';
% %For Initializing the excel you can use also
% % excel = TABLE2EXCEL('foo.xls','open'); this inserts no table.
% excel = TABLE2EXCEL('foo.xls',xtable); %if Fails it opens a new workbook
% %Then Insert another column to the same workbook
% TABLE2EXCEL(excel,xtable); %etc
% %Then Close it
% TABLE2EXCEL(excel,'close');
% In Excel you see following pattern
% Table is constructed from A to I Yo can Extend this range
% by changing eColEnd variable. The Excel is visible when you
% add some data this behavior can be made off by commented
% out the lines containing such command 'excel.Visible = 1'.
% A B C D E F G H I
% Separation 1 %%% %%% %%% %%% %%% %%% %%% %%% %%%
% Group 2 Table 1
% 3 label1 a a
% 4 label2 b b
% 5 label3 c c
%
% From B2 to I2 are merged. A2(the cell before group names) should be
% an char(187) for some reason.

% Author: Ibrahim ONARAN
% Date: 07 March 2004 Tuesday
% Time: 17:24

if nargin<1
error('Should be at least 1 argument');
end
% First, open an Excel Server.
excel = varargin{1};

if isa(excel,'COM.excel.application') %It is handle
eWB = excel.ActiveWorkbook;
if(~isempty(eWB)) %It has a active workbook
 %Closes And Saves The Excel
 if eWB.ReadOnly
 eWB.Close;
 Quit(excel);
 delete(excel);
 error('This File Is Already Open.');
 end
 if nargin > 1 & isstr(varargin{2}) & strfind(lower(varargin{2}),'cl')
 %For Safely Close Excel Handles
 % Now, save the workbook.
 Save(eWB);
 % To avoid saving the workbook and being prompted to do so
 set(eWB, 'Saved', 1);
 % Note: Make sure that you always close any workbooks that you add
 % in Excel. This can prevent potential memory leaks.
 Close(eWB);
 % Quit Excel and delete the server.
 Quit(excel);
 delete(excel);
 return
 end
else %It is not opened before then open a fresh one
 eWB = excel.Workbooks.Add;
 % Default Name is Book 1 look if this name exist if so advanced the
 % last digit by 1 to become Book2 etc
 if isempty(eWB.Path)
 new_excel_dir = excel.DefaultFilePath;
 else
 new_excel_dir = eWB.Path;
 end
 new_excel_dir = dir(new_excel_dir);
 new_excel_dir = {new_excel_dir.name};
 i = 1;
 new_excel_name = 'Book%d.xls';
 while(strmatch(sprintf(new_excel_name,i),new_excel_dir))
 i = i + 1;
 end
 new_excel_name = sprintf(new_excel_name,i);
 eWB.SaveAs(new_excel_name); %No File Name Given So Save it As it is
 eWB.Saved = 1;
end
else
%recieved a filename to open
excel = actxserver('excel.application');
[dir_file,name_file,ext_file] = fileparts(varargin{1});
if isempty(dir_file)
 dir_file = pwd;
end
if isempty(ext_file)
 ext_file = '.xls';
end
filename = [dir_file '\' name_file ext_file];
try
 eWB = excel.Workbooks.Open(filename);
 if eWB.ReadOnly
 eWB.Close;
 Quit(excel);
 delete(excel);
 error('This File Is Already Open');
 end
catch
 if ishandle(excel)
 eWB = excel.Workbooks.Add; %if file doesn't exist create a new file
 eWB.SaveAs(filename);
 eWB.Saved = 1;
 else
 rethrow(lasterror); %For handling eWB.ReadOnly Part
 end
end
if nargin > 1 & isstr(varargin{2}) & strfind(lower(varargin{2}),'op')
 eOut = excel;
 return
end
end

% Get a handle to the active sheet.
eAS = excel.ActiveSheet;
% Get a handle to the active Workbook.
eAWB = excel.ActiveWorkbook;
eColEnd = 'I' - 'A' + 1;
%Font Name
fontName = 'Courier New';
CharPerRow = 8; %Depends on font size and column width
NoElementStr = '---';
char187 = char(187);
char160 = char(160);

if length(varargin) < 2
Fields = [];
else
Fields = varargin{2};
end

if(~isfield(Fields,'Labels'))
Labels = {'Label1';'Label2'};
else
Labels = Fields.Labels(:); %Make it Column
end

if(~isfield(Fields,'MergeWidth'))
MergeWidth = 2;
else
MergeWidth = Fields.MergeWidth;
end

if(~isfield(Fields,'Data'))
Data= {'Data 1';'Data 2'};
else
Data = Fields.Data(:); %First make it column and reshape
end
idt = length(Data);
ilb = length(Labels);
if(idt<ilb)
Labels(end-[0:(ilb-idt-1)]) = []; % No data Avaliable So No Label Required
else
Data = Data(1:floor(idt/ilb)*ilb);
Data = reshape(Data,ilb,floor(idt/ilb));
end

if(~isfield(Fields,'Group'))
Group = 'DEFAULT GROUP';
else
Group = Fields.Group;
end
Group = [char160 Group char160]; %This make group name unique

if(~isfield(Fields,'SeparationStr'))
SeparationStr = {'***'};
else
SeparationStr = Fields.SeparationStr;
end

if isfield(Fields,'SheetName')
SheetName = Fields.SheetName;
SheetName(find([SheetName == '\' | SheetName == '/'])) = '|';
SheetName(find(SheetName == ':' )) = ';';
if(SheetName(end)=='|')
 SheetName(end) = [];
end
if(length(SheetName>31))
 SheetName = [SheetName(1:13),'..',SheetName(end-15:end)];
end
% Try to find sheet with name SheetName
if ~strcmp(SheetName,eAS.Name)
 try
 i = 1;
 while(1)
 if strcmp(eAWB.Sheets.Item(i).Name,SheetName)
 %Sheet found, Activate it
 eAWB.Sheets.Item(i).Activate;
 eAS = excel.ActiveSheet;
 break;
 end
 i = i+1;
 end
 catch %Can not find the sheet=>Add new sheet and rename it.
 eAWB.Sheets.Add;
 eAS = excel.ActiveSheet;
 eAS.Name = SheetName;

 end
end
end

%eFG = Find Group
%eFE = Find Empty
%eR = Temporary Range

while ~isempty(Data)
%Try to Find Group
eR = eAS.UsedRange; %Used Range
eFG = eR.Find(Group); %Find Group
insert_new_table = 1;
if(~isempty(eFG)) %If find a group name
 eFG = FindPrevious(eR,eFG); %Find Last Occurance Of Label
 eR = getrange(eAS,1,eFG.Row+1,eColEnd,eFG.Row+1); %Find An Empty Space To Insert New Data
 eFE = Find(eR,''); %Find An Empty Space To Insert New Data
 if ~isempty(eFE) & (eFE.Column + MergeWidth < eColEnd+2)
 %If Empty Space Found and Column Index does not Exceed Limits
 insert_new_table = 0;
 end
end

if insert_new_table
 %Find An Empty Space To Insert Table
 eR = eAS.UsedRange; %Used Range
 nRow = eR.Rows.Count;
 if nRow == 1
 eR = getrange(eAS,1,1,1,1); %New WorkSheet
 set(eR,'VerticalAlignment',2,'WrapText',1); % 2 Center
 set(eR,'Value',char187,'HorizontalAlignment',3); % 3 Center
 set(get(eR,'font'),'name',fontName,'bold',1); % Set Field Bold
 eR = getrange(eAS,1,1,eColEnd,1); %New WorkSheet
 else
 eR = getrange(eAS,1,eR.Row+nRow-1,eColEnd,eR.Row+nRow-1); %Go To End of used range
 end

 %Insert Seperation String
 if(~isempty(SeparationStr))
 Insert(eR,3);
 eR = getrange(eAS,1,eR.Row-1,1,eR.Row-1);
 eR.Value = char187;
 eR = getrange(eAS,2,eR.Row,eColEnd,eR.Row);
 eR.Value = SeparationStr;
 eR = getrange(eAS,1,eR.Row,eColEnd,eR.Row);
 set(eR,'VerticalAlignment',2,'WrapText',1); % 2 Center
 set(eR,'HorizontalAlignment',3); % 3 Center
 set(get(eR,'font'),'name',fontName,'bold',1); % Set Field Bold
 % If Separtion Inserted then advanced the row
 eR = getrange(eAS,1,eR.Row+1,eColEnd,eR.Row+1);
 end

 %Insert Group Name
 Insert(eR,3); %Inserts A Row
 if(isempty(SeparationStr))
 eR = getrange(eAS,1,eR.Row-1,1,eR.Row-1);
 eR.Value = char187;
 eR = getrange(eAS,2,eR.Row,eColEnd,eR.Row);
 else
 eR = getrange(eAS,2,eR.Row-1,eColEnd,eR.Row-1);
 end
 Merge(eR);
 eR.Value = Group;
 eR = getrange(eAS,1,eR.Row,eColEnd,eR.Row);
 set(eR,'VerticalAlignment',2,'WrapText',1); % 2 Center
 set(eR,'HorizontalAlignment',3); % 3 Center
 set(get(eR,'font'),'name',fontName,'bold',1); % Set Field Bold
 eFG = eR; %Store the group name for further usage

 %Write Labels
 %First Remove Labels With No Corresponding Data
 k = 0;
 for i=1:length(Labels)
 if strcmp(Data{i-k,1},NoElementStr)
 Data(i-k,:) = [];
 Labels(i-k) = [];
 k = k+1;
 end
 end
 eR = getrange(eAS,1,eFG.Row+1,1,eFG.Row+length(Labels));
 Insert(eR,3); %Inserts Rows
 eR = getrange(eAS,1,eFG.Row+1,1,eFG.Row+length(Labels));
 set(eR,'Value',Labels,'HorizontalAlignment',3); % 3 Center

 %Store Empty Cell
 eFE = getrange(eAS,2,eFG.Row+1,2,eFG.Row+1);
 eR = getrange(eAS,2,eFG.Row+1,eColEnd,eFG.Row+length(Labels));
 %When inserting new cells it copies the format of first upper cells
 %to the inserted cells. But we don't want data to be bold.
 eR.font.bold = 0;
 if(eFE.Column+MergeWidth > eColEnd)
 MergeWidth = eColEnd - eFE.Column; %Make Full Table Width
 end
else
 %This part handles the new inserted labels (always does this check even if labels are same)
 %Find Old Labels
 eR = eAS.UsedRange;
 eRowEnd = eR.Rows.Count + eR.Row;
 eR = getrange(eAS,1,eFG.Row+1,1,eRowEnd);
 eF = eR.Find(char187); %Key Point, The Left Cell of a Group Name Should always Be char187
 eR = getrange(eAS,1,eFG.Row+1,1,eF.Row-1);
 oldLabels = eR.Value; %Be careful always when getting a value from excel
 %It may not be a cell
 if ~iscell(oldLabels) oldLabels = {oldLabels};end
 %It may not be a cell str
 for i = 1:length(oldLabels)
 if isnumeric(oldLabels{i})
 oldLabels{i} = num2str(oldLabels{i});
 % elseif ~isstr(oldLabels{i})
 % I don't know else ??? numeric,string,... ?
 end
 end
 newLabels = oldLabels;
 newData = repmat({NoElementStr},length(oldLabels),size(Data,2));
 %Insert New Labels Reorder Data And Labels
 for i = 1:length(Labels)
 iLabelx = strmatch(Labels{i},oldLabels,'exact');
 if(isempty(iLabelx)) % A New Label!
 newLabels(end+1) = Labels(i);
 newData(end+1,:) = Data(i,:);
 %Insert New Line
 iRow = eFG.Row+length(newLabels);
 eINS = getrange(eAS,1,iRow,eColEnd,iRow);
 Insert(eINS);
 eRsource= getrange(eAS,2,iRow-1,eFE.Column-1,iRow-1);
 eR = getrange(eAS,2,iRow,eFE.Column-1,iRow);
 eRsource.Copy(eR);
 eR.Value= NoElementStr;
 eR = getrange(eAS,1,iRow,1,iRow);
 eR.Value= newLabels{end};
 else
 newData(iLabelx,:) = Data(i,:);
 end
 end
 Data = newData;
 Labels = newLabels;
end
%Write Datas
for j = 1:size(Data,2)
 k = j*MergeWidth + eFE.Column -1;
 if eColEnd < k | isempty(Data)
 break; %Break Loop And Insert New Table
 end
 %Control Old Labels
 for i = 1:size(Data,1)
 eR = getrange(eAS,k-MergeWidth+1,eFG.Row+i,k,eFG.Row+i);
 Merge(eR);
 set(eR,'Value',Data(i,1),'HorizontalAlignment',3); % 3 Center
 end
 Data(:,1) = [];
end
end

if nargout == 1 | isa(excel,'COM.excel.application');
%Don't Save Workbook since we will continue to use it
if(~excel.Visible)
 set(excel, 'Visible', 1);
end
if nargout == 1
 eOut = excel;
end
end
</PRE>

happy · 发表于 2006-3-24 08:19

function eRange = getrange(eAS,c1,r1,c2,r2) %Assume both c,r are start from 1 and numeric all is supplied x = ('Z' - 'A' +1); if c1>=1&c2>=1 ch0 = floor((c1-1)/x);ch1 = char(rem(c1-1,x) + 'A'); if(~ch0) ch0 = '';else ch0 = char(ch0 +'A' -1);end c1 = [ch0 ch1]; ch0 = floor((c2-1)/x);ch1 = char(rem(c2-1,x) + 'A'); if(~ch0) ch0 = '';else ch0 = char(ch0 +'A' -1);end c2 = [ch0 ch1]; else c1='';c2=''; end if r1>=1&r2>=1 r1 = int2str(r1);r2 = int2str(r2); else r1='';r2=''; end if ~isempty(r1) | ~isempty(c1) eRange = [c1 r1 ':' c2 r2]; else eRange = 'A1:A1'; end eRange = Range(eAS,eRange); 
Example: % xtable.Data = {\'a\',\'b\',\'c\'}; % xtable.Labels = {\'label1\',\'label2\',\'label3\'}; % xtable.SeparationStr = \'%%%\'; % Can be empty % xtable.MergeWidth = 2; % xtable.Group = \'Table 1\'; % %For Initializing the excel you can use also % % excel = TABLE2EXCEL(\'foo.xls\',\'open\'); this inserts no table. % excel = TABLE2EXCEL(\'foo.xls\',xtable); %if Fails it opens a new workbook % %Then Insert another column to the same workbook % TABLE2EXCEL(excel,xtable); %etc % %Then Close it % TABLE2EXCEL(excel,\'close\'); % In Excel you see following pattern % Table is constructed from A to I Yo can Extend this range % by changing eColEnd variable. The Excel is visible when you % add some data this behavior can be made off by commented % out the lines containing such command \'excel.Visible = 1\'. % A B C D E F G H I % Separation 1 %%% %%% %%% %%% %%% %%% %%% %%% %%% % Group 2 Table 1 % 3 label1 a a % 4 label2 b b % 5 label3 c c % % From B2 to I2 are merged. A2(the cell before group names) should be % an char(187) for some reason. % Author: Ibrahim ONARAN % Date: 07 March 2004 Tuesday % Time: 17:24

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[求助]求高手指点 bp神经网络

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回复：（zhbrest）[求助]求高手指点 bp神经网络

回复：（zhbrest）[求助]求高手指点 bp神经网络

回复：（zhbrest）[求助]求高手指点 bp神经网络

回复：（zhbrest）[求助]求高手指点 bp神经网络