%检查变量是否存在ifexist('myVariable','var')disp('myVariable 存在');elsedisp('myVariable 不存在');end%检查函数是否存在ifexist('myFunction','file')disp('myFunction 存在');elsedisp('myFunction 不存在');end%检查文件是否存在ifexist('myFile.txt','file')disp('myFile.txt 存在');elsedisp(...
if exist('myVariable', 'var') disp('myVariable 存在'); else disp('myVariable 不存在'); end % 检查函数是否存在 if exist('myFunction', 'file') disp('myFunction 存在'); else disp('myFunction 不存在'); end % 检查文件是否存在 if exist('myFile.txt', 'file') disp('myFile.txt 存...
exist用来判断变量或函数是否存在：exist Check if variables or functions are defined. exist('A') returns: 0 if A does not exist 1 if A is a variable in the workspace 2 if A is an M-file on MATLAB's search path. It also returns 2 when A is the full p...
Check if variable exists in workspace to plot... Learn more about gui, error, check variable, exist, workspace, errordlg, if statement MATLAB
>> help existEXIST Check if variables or functions are defined.EXIST('A') returns:0 if A does not exist1 if A is a variable in the workspace2 if A is an M-file on MATLAB's search path.It also returns 2 whenA is the full pathname to a file or when A is the name ...
%disp(testresults); %can't work because variable testresults does not %exist. testresults = magic(5) %create variable exist testresults; %returns "1", variable exists if (exist testresults var) %why can't I check if this exists? %File: temp.m Line: 6 Column: 11...
Here is a simple example to read all the MAT files in a given directory and load a variable named 'myVar' if it exists. 테마복사 myFiles = dir('*.mat'); for i=1:length(myFiles) clear myVar; load(myFiles(i).name,'myVar') if exist('myVar','var') disp(...
0: The variable or file does not exist. 1: The variable or file exists in the specified scope. 2: The variable or file exists in the global workspace, regardless of the specified scope. 3: The variable or file exists as a variable in the currentworkspace, even if it is also defined ...
If name matches both a variable and a P-code file, exists returns 1, identifying it as a variable. If name matches both a folder and a MATLAB function, exist returns 7, identifying it as a folder. example exist name searchType returns the type of name, restricting results to the ...
if ~exist('example_width', 'var') || isempty(example_width) example_width = round(sqrt(size(X, 2))); end % Gray Image colormap(gray); % Compute rows, cols [m n] = size(X); example_height = (n / example_width); % Compute number of items to display ...