 Help WLanguage WLanguage functions Standard functions Numeric values management functions Matrix functions MatMultiply Presentation Example Multiplying matrices Existence of the result matrix Related examples 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
• Multiplying matrices
• Existence of the result matrix
WINDEV      WEBDEV    WINDEV Mobile       Others MatMultiply (Function)
In french: MatMultiplie
Multiplies two matrices. // Multiply two matrices
ResMultiply = MatMultiply("Matrix1", "Matrix2", "MyResultMatrix")
Syntax
<Result> = MatMultiply(<1st matrix> , <2nd matrix> , <Result matrix>)
<Result>: Boolean
• True if the multiplication was performed,
• False otherwise. To get more details on the error, use ErrorInfo with the errMessage constant.
<1st matrix>: Character string
Name of first matrix to multiply, defined by MatCreate.
<2nd matrix>: Character string
Name of second matrix to multiply, defined by MatCreate.
<Result matrix>: Character string
Name of the matrix that contains the result of the multiplication. This matrix is automatically created when the two matrices are multiplied.
Remarks

Multiplying matrices

To multiply two matrices, the number of columns in the first matrix must be equal to the number of rows in the second matrix.
The element (row I, column j) of the result matrix is obtained by multiplying the row I of the first matrix by the column j of the second matrix.
A matrix can be multiplied by itself. To do so, use the same matrix name for <1st matrix> and <2nd matrix>.

Existence of the result matrix

The matrix existence is not checked. This matrix is overwritten if it existed beforehand. To check the matrix existence, use MatExist.
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...
Business / UI classification: Neutral code
Component: wd270mat.dll
Minimum version required
• Version 9