Check if variable exists in workspace to plot... Learn more about gui, error, check variable, exist, workspace, errordlg, if statement MATLAB
%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...
The output variable FILENAME is a string containing the name of the file selected in the dialog box. If the user presses Cancel, it is set to 0. The output variable PATHNAME is a string containing the path of the file selected in the dialog box. If the user presses Cancel, it is set...
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 ...
52、rpose%Todemonstrateopeninganoutputfileproperly.%Thisprogramchecksfortheexistenceofanoutput%fileIfitexists,theprogramcheckstoseeif%theoldfileshouldbedeleted,oriftlienewdata%shouldbeappendedtotheoldfile%Recordofrevisions:%DateProgrammerDescriptionofchange一%11/29/98S.J.ChapmanOnginalcode%Definevariable 53...
variablenames(seeSYMVAR). Ifnovariableexists,'x'isused. INLINE(EXPR,ARG1,ARG2,...)constructs aninlinefunctionwhoseinputargumentsare specifiedbythestringsARG1,ARG2,... Multicharactersymbolnamesmaybeused. INLINE(EXPR,N),whereNisascalar, constructsaninlinefunctionwhoseinput ...
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 ...
(1 point)Theory: A matrix A is said to be orthogonally diagonalizable if there exists an orthogonalmatrix P ( 1 T P P = ) and a diagonal matrix D, such that, 1 A PDP = , or equivalently,T A PDP = .Theorem: An n n matrix A is orthogonally diagonalizable if and only if A is...
If a variable already exists in a MAT-file, then save overwrites it with the value in the workspace. For ASCII files, "-append" adds data to the end of the file. To append to a Version 6 MAT-file, you must also specify version as "-v6". example save(filename,variables,"-append...
Intro_MATLAB_1 TheMATLABSystem TheMATLABsystemconsistsoffivemainparts:1.TheMATLABlanguageThisisahigh-levelmatrix/arraylanguagewithcontrolflowstatements,functions,datastructures,input/output,andobject-orientedprogrammingfeatures.Itallowsboth"programminginthesmall"torapidlycreatequickanddirtythrow-awayprograms,and"...