- Calculating the determinant of a matrix
Calculating the determinant of a matrix The following code is used to calculate the determinant of a matrix. The name of the matrix is entered by the user in an edit control (EDT_MatrixName). We assume that the matrix is already created. The existence of the matrix is checked by MatExist. The number of columns must be equal to the number of rows.
// -- Click code on BTN_Determinant
// Declare the variables
ResDeterminant is real
// Checks whether the matrix exists
IF MatExist(EDT_MatrixName) = True THEN
// Nb. columns in the matrix = Nb. rows in the matrix?
IF MatNbColumn(EDT_MatrixName) = MatNbRow(EDT_MatrixName) THEN
// Calculate the determinant
ResDeterminant = MatDeterminant(EDT_MatrixName)
IF ResDeterminant <> 0 THEN
Info("The value of the determinant is: " + ResDeterminant)
ELSE
// Error?
IF MatError(EDT_MatrixName) = 0 THEN
Info("The determinant is null")
ELSE
// Display the error message
Error(ErrorInfo(errMessage))
END
END
ELSE
Info("The number of columns is not equal to the number of rows")
END
ELSE
Info("The matrix does not exist")
END
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