最近一直在研究LibSVM，其中csv格式到libsvm標準格式的轉換，使用的是matlab中的幾行程式碼實現的，也蠻好用的，但由於之後想做一個面向物件和SVM結合的建築物自動提取的程式，主程式初步打算用C#實現，這樣就涉及格式轉換程式碼整合到C#的問題，由於C#調libsvm的介面不太會用，想用matlab的GUI直接實現格式轉換的exe，然後再用C#直接呼叫exe程式，初次接觸matlab的GUI，感覺和C#差不多，程式也沒什麼功能，直接上程式碼：

function varargout = csv_lib(varargin)
% CSV_LIB MATLAB code for csv_lib.fig
%      CSV_LIB, by
 
 itself, creates a new CSV_LIB or raises the existing
%      singleton*.
%
%      H = CSV_LIB returns the handle to a new CSV_LIB or the handle to
%      the existing singleton*.
%
%      CSV_LIB('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in CSV_LIB.M with
 
 the given input arguments.
%
%      CSV_LIB('Property','Value',...) creates a new CSV_LIB or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before csv_lib_OpeningFcn gets called.  An
%      unrecognized property name or invalid value makes property
 
 application
%      stop.  All inputs are passed to csv_lib_OpeningFcn via varargin.
%
%      *See GUI Options on GUIDE's Tools menu.  Choose "GUI allows only one
%      instance to run (singleton)".
%
% See also: GUIDE, GUIDATA, GUIHANDLES

% Edit the above text to modify the response to help csv_lib

% Last Modified by GUIDE v2.5 14-Jul-2015 16:29:47

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @csv_lib_OpeningFcn, ...
                   'gui_OutputFcn',  @csv_lib_OutputFcn, ...
                   'gui_LayoutFcn',  [] , ...
                   'gui_Callback',   []);
if nargin && ischar(varargin{1})
    gui_State.gui_Callback = str2func(varargin{1});
end

if nargout
    [varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
else
    gui_mainfcn(gui_State, varargin{:});
end
% End initialization code - DO NOT EDIT


% --- Executes just before csv_lib is made visible.
function csv_lib_OpeningFcn(hObject, eventdata, handles, varargin)
% This function has no output args, see OutputFcn.
% hObject    handle to figure
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% varargin   command line arguments to csv_lib (see VARARGIN)

% Choose default command line output for csv_lib
handles.output = hObject;

% Update handles structure
guidata(hObject, handles);

% UIWAIT makes csv_lib wait for user response (see UIRESUME)
% uiwait(handles.figure1);


% --- Outputs from this function are returned to the command line.
function varargout = csv_lib_OutputFcn(hObject, eventdata, handles)
% varargout  cell array for returning output args (see VARARGOUT);
% hObject    handle to figure
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Get default command line output from handles structure
varargout{1} = handles.output;





% --- Executes on button press in OpenCSVFile.
function OpenCSVFile_Callback(hObject, eventdata, handles)
% hObject    handle to OpenCSVFile (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
global strFullPath
global FileName
[FileName,PathName]=uigetfile('*.csv','開啟csv檔案','MultiSelect','off')
strFullPath=[PathName FileName];



% --- Executes on button press in ExeTransform.
function ExeTransform_Callback(hObject, eventdata, handles)
% hObject    handle to ExeTransform (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
global strFullPath
global labels
global features_sparse
csvRead=csvread(strFullPath);
labels = csvRead(:, 1); % labels from the 1st column
features = csvRead(:, 2:end);
features_sparse = sparse(features); % features must be in a sparse matrix
tip=msgbox('轉換完成！','提示')




% --- Executes on button press in SavelibsvmFormat.
function SavelibsvmFormat_Callback(hObject, eventdata, handles)
% hObject    handle to SavelibsvmFormat (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
global FileName
global labels
global features_sparse
FileNameWithoutExtent= FileName(1:(find(FileName=='.')-1))
[outFileName,outPathName]=uiputfile({'*.*'},'另存為',FileNameWithoutExtent)
outFullPath=[outPathName outFileName];
libsvmwrite(outFullPath, labels, features_sparse);

GUI介面：

打包時把MCR也打包進去，使用的是matlab R2011b進行的打包，方便未安裝matlab的計算機使用：

完整工程檔案連結：
格式轉換