 Help WLanguage WLanguage functions Standard functions Numeric values management functions Matrix functions MatExist Presentation Example Existence of a matrix in memory See also  MatAdd (Example) MatAdd MatCopy (Example) MatCopy MatCreate (Example) MatCreate MatDelete (Example) MatDelete MatDeterminant (Example) MatDeterminant MatError (Example) MatError MatExist (Example) MatExist MatFill (Example) MatFill MatFloatAdd (Example) MatFloatAdd MatFloatMultiply (Example) MatFloatMultiply MatInvert (Example) MatInvert MatMultiply (Example) MatMultiply MatNbColumn (Example) MatNbColumn MatNbLine (Example) MatNbLine MatRead (Example) MatRead MatReadColumn (Example) MatReadColumn MatReadLine (Example) MatReadLine MatStack (Example) MatStack MatTranspose (Example) MatTranspose MatWrite (Example) MatWrite Matrix management functions The matrices
 Existence of a matrix in memory WINDEV      WEBDEV    WINDEV Mobile       Others MatExist (Function) In french: MatExiste Checks the whether the matrix exists in memory.Example // Checks whether the matrix existsResExist = MatExist("MyMatrix") Syntax = MatExist() : BooleanTrue if the matrix exists in memory,False otherwise. To get more details on the error, use ErrorInfo with the errMessage constant. : Character stringName of the matrix defined with MatCreate. Remarks Existence of a matrix in memoryA matrix can be created:with MatCreate, by copying a matrix (MatCopy),by adding two matrices (MatAdd),by multiplying two matrices (MatMultiply),by creating the transposed matrix (MatTranspose),by creating the inverse matrix (MatInvert).A matrix can be deleted:with MatDelete,when closing the application.Business / UI classification: Neutral codeComponent: wd270mat.dll Minimum version required Version 9 This page is also available for…