您可以使用whos来获取一组结构，这些结构描述了每个变量的字节大小。 请注意，根据定义，double是64位！
"<<endl;exit(EXIT_FAILURE);}//将数组中的数据写入到mxArray空间中memcpy((void*)mxGetPr(A),(void*)arData,sizeof(arData));//将矩阵变量A写入到MATLAB引擎空间nStatus=engPutVariable(ep,"A",A);if(nStatus!=0){cout<<"矩阵变量写入MATLAB引擎空间失败。"<<endl;exit(EXIT_FAILURE);}//执行引擎命令...
(variableLength,sizeof(char));mxGetString(prhs[index],variableName[counter],variableLength);counter++;}// 打开MAT文件file=matOpen(fileName,"r");if(file<(MATFile*)3){mexErrMsgTxt("Error: Cannot open the mat file!");}//读取MAT文件变量if(counter>0){for(index=0;index<counter;index++){...
size Get array dimensions of variable in MAT-file allDims = size(matObj,variable)returns the size of each dimension of the specified variable in the file corresponding tomatObj. The outputallDimsis a1-by-mvector, wherem = ndims(variable). ...
用高斯消去法把矩阵A转换为上三角阵 [m,n]=size(A); %获得A的行和列分别存入m和n中 列主元素消去法 for k=1:n-1 [v,u]=max(abs(A(k:n,k))); %选出A的第k列中绝对值最大元素存入v, 而u是记录多少的行或列，并取最大值，比如有m行，n列，且n>m,则u=n 计算矩阵A...
(freeing) the memory. This is important to prevent memory leaks. The lifecycle of anmxArray—and the rules for managing memory—depends on whether it is an input argument, output argument, or local variable. The function you call to deallocate anmxArraydepends on the function you used to ...
(name);//engPutVariable(ep,"filename",filename);engEvalString(ep,"X=imread('D:/Program Files/MATLAB/R2010b/bin/win32/lena.jpg');");//在engine中读取一张图片engEvalString(ep,"imshow(X)");//显示图片mxArray *X=engGetVariable(ep,"X");//从engine获得真正的数组Xintndims=mxGetNumberOf...
variable built-in function subfunction private function mex-file p-file m-file 当我们给cos赋值,cos将会变成一个变量,而不再是内置函数。 >> cos = 'This is a string'; >> cos(8) ans = ' ' >> clear cos %从workspace中删除 >> cos(8) ans = -0.1455 ...
('基础数据','B3:D3') 分享2赞 matlab吧 MDR32 关于Undefined function or variable错误代码如下: num=[1]; den=[1 -0.9 0.81]; [z,p,K]=tf2zp(num,den); zplane(z,p); omega=[0:511]*pi/256; unitcirc=exp(j*omega); ps1=p; lp=length(ps1); zs1=z; lz=length(zs1); polevectors1...
2、 变量命名(Variable naming) 变量的命名以字母开头且区分大小写,可以由字母、数字和下划线组成,但不能使用标点,同时,变量名要能够清晰表达出变量所表示的意义。 Variable naming starts with a letter and is case-sensitive. It can consist of letters, numbers, and underscores, but cannot use punctuation ...