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 是用符号计算吗？ 可以用函数 sym( )定义符号变量。>> sym('x') %定义符号变量xans =x用命令 syms 定义符号变量。>>syms a b变量y没有定义估计把代码发...
Dear MATLAB experts, I'm trying to find a way of removing rows from the table 'transaction_dates' if there is not a variable in the table 'stockprice_data' with the same "isin" as in any of the rows of the variable "isin" in the table 'transaction...
Check if variable exists in workspace to plot... Learn more about gui, error, check variable, exist, workspace, errordlg, if statement MATLAB
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...
In the third example, thevariable `a` does not exist in the workspace of the calling function, so exist returns 0. 中文回答: exist是MATLAB中的一个内置函数,它分别检查变量或文件是否存在于工作区或文件系统中。它需要一个或两个输入参数: 1.变量名或文件路径,要检查的变量的名称或要检查的文件的...
>> 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 ...
nVar,true); % If honor bounds mode, then check that initial point strictly satisfies the % simple inequality bounds on the variables and exactly satisfies fixed variable % bounds. if strcmpi(AlwaysHonorConstraints,'bounds') || strcmpi(AlwaysHonorConstraints,'bounds-ineqs') violatedFixedBnds_idx ...
This can be done by specifying additional arguments to the "load" command. MATLAB will search for each additional string argument as a variable name within the MAT files specified in the first argument. If it does not find a variable of that name, it will throw a warning. ...
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...
46、nates:设置图表绘制命令所使用的坐 标系单位3)图表绘制命令栏2、封装编辑器之参数初始化对话框回冈IconInitializationDocume nt 吕 tio 门tifl娅参设控Mask炒片: IAddUpDownDeleteVariable1Control type:|Edit1Assignment:| Evaluate* 匸* Prompt:rVariable:Popup strings:Initialization commands:OK ICancelUnmas...