从MATLAB代码生成独立c语言代码.docx

1、从MATLAB代码生成独立c语言代码从MATLAB代码生成独立c语言代码Matlab 用 help lsqcurvefit MATLAB Coder可以从MATLAB代码生成独立的、可读性强、可移植的C/C+代码。使用MATLAB Coder产生代码的3个步骤：准备用于产生代码的MATLAB算法；检查MATLAB代码的兼容性(有些matlab代码语句并不能生成c/c+代码)；产生最终使用的源代码或MEX。利用MATLAB Coder生成c+代码，并在vs2008中验证：一个简单的例子，两数相乘：1、安装matlab2011a或者更新版本；2、简单生成一个foo.m文件；function c =

2、 foo(a, b)%#codegen%This function muliplies a and bc = a * b其中，%#codegen可以防止出现警告错误 double a = 0.0, b = 0.0, c = 0.0; cinab; c = foo(a, b); coutc = cendl; return 0;一个复杂的例子，求一个数的n次方根：1、 两个.m文件：nrt.m:function nth_rt, iterations, hstry = nrt(varargin)%#codegen%This function will use a Newton Search Tech

3、nique to find%the nth root of a number, a, to the tolerance, tol.%The square root% nrt(10, 2), or nrt(10, 2, 1e-9)%The n root%nrt(10, n), or nrt(10, n, 1e-9)a = varargin1;n = varargin2;if nargin = 3 tol = 1e-9;else tol = varargin3;endif a 0 nth_rt = 0; iterations = 0; hstry = 0;else nth_rt, hstry =

4、newtonSearchAlgorithm(a, n, tol); iterations = length(find(hstry = 0); %iterations = sum(hstry = 0);endnewtonSearchAlgorithm.m：function x, h = newtonSearchAlgorithm(b, n, tol) %#codegen%Given, a, this function finds the nth root of a%number by finding where: xn-a = 0coder.inline(never); %使其生成一个单独的c+

5、文件notDone = 1;aNew = 0; %Refined Guess Initializationa = 1; %Initial Guesscnt = 0;h = zeros(50, 1);h(1) = a;while notDone cnt = cnt + 1; curVal, slope = f_and_df(a, b, n); % square yint = curVal - slope * a; aNew = -yint / slope; %The new guess h(cnt) = aNew; if (abs(aNew-a) 49 %after 50 iterations,

6、 stop notDone = 0; aNew = 0; else a = aNew; endendx = aNew;function f, df = f_and_df(a, b, n)%Our function is f=an-b and its derivative is n*a(n-1).f = an-b;df = n*a(n-1);2、 在命令窗口输入coder(图形界面)，回车，弹出MATLAB Coder Project对话框；3、在New选项卡Name中输入一个工程名nrt.prj；点击Ok，弹出MATLAB Coder MEX Function对话框；4、在Overview选项

7、卡中，点击Add files，弹出对话框，选中nrt.m打开；5、添加三个输入，分别为10、2、1e-9；两个输入也可以；6、选中Build选项卡，Output type中选择c/c+ Static Library；选中Generate code only；7、点击More settings，General-Language选择C+；Interface选项中去掉所有选项；Close；8、点击Build，进行编译；点击View report，弹出Code Generation Report对话框；9、利用vs2008建立一个控制台应用程序，将生成的相关文件nrt.cpp、nrt.h、newton

8、SearchAlgorithm.cpp、newtonSearchAlgorithm.h、nrt_types.h、rtwtypes.h拷到相关目录下并添加到应用程序中；10、分别在nrt.cpp、newtonSearchAlgorithm.cpp文件中添加#include “stdafx.h”；11、test.cpp文件中代码为：#include stdafx.h#include nrt.h#include using namespace std;int _tmain(int argc, _TCHAR* argv) double varargin_1 = 0, varargin_2 = 0, v

9、arargin_3 = 1e-9; cinvarargin_1varargin_2; double nth_rt = 0, iterations = 0; double hstry_data50 = 0; int hstry_sizes1 = 0; nrt(varargin_1, varargin_2, varargin_3, &nth_rt, &iterations, hstry_data, hstry_sizes); coutnth_rt = nth_rtendl; coutiterations = iterationsendl; couthstry_data = endl; for (int i=0; i50; i+) couthstry_dataiendl; couthstry_sizes = hstry_sizes0endl; return 0;