MatExist (Function) - PC SOFT - On-line documentation

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Existence of a matrix in memory

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MatExist (Function)

In french: MatExiste

Checks the existence of a matrix in memory.

Versions 15 and later

Android

This function is now available for Android applications.

New in version 15

Android

This function is now available for Android applications.

Android

This function is now available for Android applications.

Versions 17 and later

iPhone/iPad

This function is now available for iPhone/iPad applications.

New in version 17

iPhone/iPad

This function is now available for iPhone/iPad applications.

iPhone/iPad

This function is now available for iPhone/iPad applications.

Versions 18 and later

This function is now available in Android Widget mode.

Universal Windows 10 App

This function is now available in Windows Store apps mode.

New in version 18

This function is now available in Android Widget mode.

Universal Windows 10 App

This function is now available in Windows Store apps mode.

This function is now available in Android Widget mode.

Universal Windows 10 App

This function is now available in Windows Store apps mode.

Versions 21 and later

Universal Windows 10 App

This function is now available in Universal Windows 10 App mode.

New in version 21

Universal Windows 10 App

This function is now available in Universal Windows 10 App mode.

Universal Windows 10 App

This function is now available in Universal Windows 10 App mode.

Versions 25 and later

WEBDEV - Browser code

This function is now available in browser code.

New in version 25

WEBDEV - Browser code

This function is now available in browser code.

WEBDEV - Browser code

This function is now available in browser code.

Example

See additional examples

// Checks the matrix existence
ResExist = MatExist("MyMatrix")

Syntax

<Result> = MatExist(<Matrix>)

<Result>: Boolean

True if the matrix exists in memory,
False otherwise. To find out the error details, use ErrorInfo associated with the errMessage constant.

<Matrix>: Character string (with quotes)

Name of the matrix to check, defined by MatCreate.

Remarks

Existence of a matrix in memory

A matrix can be created:

by 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 code

Component : wd250mat.dll

See also

Minimum version required

Version 9

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Last update: 05/14/2020

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