Check if variable exists in workspace to plot... Learn more about gui, error, check variable, exist, workspace, errordlg, if statement MATLAB
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 %Invalid expression. Check for missing multiplication operator, missing or unbalanced...
Check if a function input exists in workspace. Learn more about function, inputs, exist, inputname, workspace
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...
>> 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 ...
This feature probably doesn't exist, but I thought I'd ask. Is there a way to check if a certain variable or field in a structure is called? I'm reading through a very large existing code, and rather than trying to step line by line (which is what I'm currently doing), it would...
Check If MATLAB Function Is Built-In Function Check whether theplotfunction is a built-in function or a file. A = exist('plot') A = 5 This indicates thatplotis a built-in MATLAB function. Input Arguments collapse all name—Name of variable, script, function, folder, or class ...
0—namedoes not exist or cannot be found for other reasons. For example, ifnameexists in a restricted folder to which MATLAB does not have access,existreturns 0. 1—nameis a variable in the workspace. 2—nameis a file with extension.m,.mlx, or.mlapp, ornameis the name of a file ...
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 ...
楼上说的有问题, The variable y does not exist意思是变量y不存在 还有,不能直接对函数文件运行,函数要放在主文件里调用才可以 是