exm12033_1.cpp

这是学习matlab的好的程序

#include "engine.h"			
#include "mat.h"			
#include <iostream.h>		
#include <windows.h>		
#include <stdlib.h>			
#include <iomanip.h>		
void main()
{
	double * b,a[9]={1,4,7,2,5,8,3,6,9};
	const char *file="mymat.mat";
	mxArray *Ain,*Aout,*SV;
	Engine * ep;
	MATFile *mat;
	mat=matOpen(file,"w");
	Ain = mxCreateDoubleMatrix(3,3,mxREAL);	
	mxSetClassName(Ain,"z");			
	memcpy((char *)mxGetPr(Ain),(char *)a,9*sizeof(double));
	matPutVariable(mat,"z",Ain);	
	matClose(mat);				
	mxDestroyArray(Ain);	
	mat=matOpen(file,"r");
	Aout =matGetVariable(mat,"z");
	if(ep=engOpen(NULL))		
	{
		engPutVariable(ep,"z",Aout);
		engEvalString(ep,"sv=svd(z);");	
		SV=engGetVariable(ep,"sv");		
		b=mxGetPr(SV);				
		cout<<"奇异值为";				
		cout<<"\n";						
		for(int i=0;i<3;i++)
		{
			cout<<setw(16)<<b[i];		
		}
		engClose(ep);					
		matClose(mat);					
		mxDestroyArray(Aout);		
		mxDestroyArray(SV);			
	}
	else
		cout<<"Can't open matlab";	
}