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怎么在c語(yǔ)言中使用matlab畫(huà)圖函數(shù)

在C語(yǔ)言中使用MATLAB畫(huà)圖函數(shù),可以通過(guò)以下步驟實(shí)現(xiàn):

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1、安裝MATLAB的C/C++ API。

2、編寫(xiě)C語(yǔ)言代碼,調(diào)用MATLAB的畫(huà)圖函數(shù)。

3、編譯并運(yùn)行C語(yǔ)言代碼。

下面是詳細(xì)的步驟和示例代碼:

1. 安裝MATLAB的C/C++ API

確保已經(jīng)安裝了MATLAB軟件,按照以下步驟安裝MATLAB的C/C++ API:

1、打開(kāi)MATLAB軟件。

2、在命令窗口中輸入cd(matlabroot),回車(chē),這將切換到MATLAB的安裝目錄。

3、輸入mex setup,回車(chē),按照提示操作,選擇“Install Using the Internet”選項(xiàng),然后選擇“Compiler Toolsuite”(或相應(yīng)的編譯器)。

4、安裝完成后,重啟MATLAB。

2. 編寫(xiě)C語(yǔ)言代碼,調(diào)用MATLAB的畫(huà)圖函數(shù)

創(chuàng)建一個(gè)名為draw_figure.c的文件,然后將以下代碼復(fù)制到文件中:

#include "mex.h"
#include "mat.h"
#include "graphics.h"
void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])
{
    // 檢查輸入?yún)?shù)的數(shù)量和類(lèi)型
    if (nrhs != 1 || nlhs != 0) {
        mexErrMsgIdAndTxt("draw_figure:invalidNumInputs", "Usage: draw_figure(data)");
    }
    if (!mxIsDouble(prhs[0])) {
        mexErrMsgIdAndTxt("draw_figure:invalidInputType", "Data must be a double array.");
    }
    // 獲取輸入數(shù)據(jù)
    const mwSize *dims = mxGetDimensions(prhs[0]);
    double *data = mxGetPr(prhs[0]);
    int rows = dims[0];
    int cols = dims[1];
    // 創(chuàng)建圖形窗口和坐標(biāo)軸對(duì)象
    gcf();
    axes();
    axis([0 rows 0 cols]);
    hold on;
    grid on;
    // 繪制數(shù)據(jù)點(diǎn)
    for (int i = 0; i < rows; i++) {
        for (int j = 0; j < cols; j++) {
            plot(j, data[i * cols + j], 'o');
        }
    }
    hold off;
}

3. 編譯并運(yùn)行C語(yǔ)言代碼

接下來(lái),使用MATLAB編譯器將C語(yǔ)言代碼編譯為MEX文件,在命令窗口中輸入以下命令:

mex draw_figure.c o draw_figure.mexglx largeArrayDims lX11 lmex fopenmp I/usr/local/MATLAB/R2022b/extern/include L/usr/local/MATLAB/R2022b/bin/glnxa64 lmat lmwservices lMWExceptions lMWMath lMWNumeric lMWThread lstdc++ lpthread lm ldl Wl,rpath,/usr/local/MATLAB/R2022b/bin/glnxa64 std=c++11 fopenmp fexceptions fnocommon O3 DMATLAB_MEX_FILE finlinefunctions falignfunctions=8 falignjumps=8 falignlabels=8 falignloops=8 falignbranches=8 Wnounknownpragmas Wnounusedlabel Wnosigncompare Wnouninitialized Wnounusedvariable Wnounusedbutsetvariable Wnoimplicitfallthrough Wnoincompatiblepointertypes Wnodiscardedqualifiers Wnomissingfieldinitializers Wnoformatnonliteral Wnoformatsecurity Wnoformaty2k Wnodeprecateddeclarations Wnopacked Wnovariadicmacros Wnostrictaliasing Wnostrictoverflow=5 Wnostrictprototypes Wnosystemheaders Wnoaggregatereturn Wnocastfunctiontype Wnocharsubscripts Wnoconversion Wnosequencepoint Wnomissingbraces Wnomissingfieldinitializers Wnounusedparameter Wnounusedconstvariable Wnounusedvariable Wnounusedconstvariable Wnounusedconstvariable Wnolinebreakstyle CXXFLAGS="$CXXFLAGS" OPTIMFLAGS=O3 OPTIMFLAGS=DNDEBUG OPTIMFLAGS=funrollloops OPTIMFLAGS=fomitframepointer OPTIMFLAGS=ffastmath OPTIMFLAGS=msse2 OPTIMFLAGS=mfpmath=sse OPTIMFLAGS=msse3 OPTIMFLAGS=mfpmath=sse OPTIMFLAGS=finline LLDOPTS=shared OPTIMFLAGS=fopenmp OPTIMFLAGS=fopenmp CXXOPTS="$CXXOPTS" OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMFLAGS=finline OPTIMPLICITINLINE void __attribute__((__gnu_inline__)) draw_figure(double *data, int rows, int cols) { ... } MEXPATH="/usr/local/MATLAB/R2022b/bin/glnxa64"; MEXLIB="/usr/local/MATLAB/R2022b/bin/glnxa64"; MEXLIBPATH="/usr/local/MATLAB/R2022b/bin/glnxa64"; /usr/local/MATLAB/R2022b/bin/glnxa64/gcc/mex: line 1: syntax error near unexpected token `(' CMakeFilesdraw_figure.dirbuild.make:79: recipe for target 'draw_figure.mexglx' failed make[2]:  [draw_figure.mexglx] Error 1 make[2]: Leaving directory '/Users/username/Documents/draw_figure' makefile:19: recipe for target 'all' failed make[1]: 

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