MatWrite (Function)

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Matrix existence
Matrix size

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MatWrite (Function)

In french: MatEcrit

Writes an element into a matrix.

Versions 15 and later

This function is now available for Android applications.

New in version 15

This function is now available for Android applications.

Versions 17 and later

This function is now available for iPhone/iPad applications.

New in version 17

This function is now available for iPhone/iPad applications.

Versions 18 and later

This function is now available in Android Widget mode.

This function is now available in Windows Store apps mode.

New in version 18

This function is now available in Android Widget mode.

This function is now available in Windows Store apps mode.

This function is now available in Android Widget mode.

This function is now available in Windows Store apps mode.

Versions 21 and later

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

New in version 21

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

Versions 25 and later

This function is now available in browser code.

New in version 25

This function is now available in browser code.

Example

See additional examples

// Assign 6 to the element (row 2, column 2)
ResWrite = MatWrite("MyMatrix", 6, 2, 2)

Syntax

<Result> = MatWrite(<Matrix> , <Value> , <Element row> , <Element column>)

<Result>: Boolean

True if the writing was performed,
False otherwise. To get the details of the error, use ErrorInfo with the errMessage constant.

<Matrix>: Character string (with quotes)

Name of the matrix to use, defined with MatCreate.

<Value>: Real

Value given to the specified element.

<Element row>: Integer

Row of the element to initialize.

<Element column>: Integer

Column of the element to initialize.

Remarks

Matrix existence

A matrix must exist before it can be filled. To check the matrix existence, use MatExist.

Matrix size

The matrix size is managed dynamically. If the coordinates (row and columns) of the element to insert into the matrix are greater than the matrix dimension (total width and total height of the matrix), the element is added at the specified position. In this case, the matrix is filled with zeros.

For example:

MatWrite("MyArchive", 9, 2, 4)

Related Examples:

Unit examples (WINDEV): The Matrix functions

[ + ] Using matrices with the WLanguage functions.
This example, powered by WINDEV, is used to perform calculations on matrices: addition, multiplication, transposition, inversion...

Unit examples (WINDEV Mobile): The Matrix functions

[ + ] Using matrices with the WLanguage functions: addition, multiplication, transposition, inversion...

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Component : wd260mat.dll