Matrix Math Toolbox

 This section describes the six FUNCTION procedures supported by the Matrix
 Math toolbox.
 *    MatAdd FUNCTION
 *    MatSub FUNCTION
 *    MatMult FUNCTION
 *    MatDet FUNCTION
 *    MatInv FUNCTION
 *    MatSEqn FUNCTION

 Matrix Math is the name of a BASIC toolbox (MATB.BAS) included with
 Microsoft BASIC. The toolbox contains a set of matrix-manipulation
 procedures that perform math operations on two-dimensional matrixes. There
 is a separate toolbox procedure for each supported numeric data type. Which
 one to use depends on the data type of the elements in the matrix. The last
 letter in the procedure name identifies the data type of the procedure, as
 follows.


 Letter    Numeric data type
 I         Integer
 S         Single precision floating point
 C         Currency
 L         Long integer
 D         Double precision floating point


 All numeric data types are supported by MatAdd, MatSub, MatMult, and MatDet.
 Integer and long integer data types are not supported by MatInv and MatSEqn.

 Each procedure returns a result code that indicates the success of the
 operation, or, in the case of an error, the nature of the problem
 encountered. The following result codes are defined.

 Result code    Significance
   0            Normal completion. No error occurred.
 - 1            Determinant for matrix is 0. No inverse of the input matrix
 exists.
 - 2            Matrix not square; doesn't have same number of rows as
 columns.
 - 3            Inside dimension not the same. The number of columns in
 matrix1 is not the same as the number of rows in matrix2.
 - 4            Matrixes not of the same dimension. That is, there are not
 the same number of rows in matrix1 that are in matrix2 or there are not the
 same number of columns in matrix1 that are in matrix2.
 - 5            Dimensions for the solution matrix not correctly declared.
 The matrix does not have the proper number of rows and columns.



 Note
 ----
 By default all arrays are zero based; that is, the lower bound of an array
 is 0. You may wish to use OPTION BASE 1 so that the numbers in the DIM
 statement accurately reflect the number of row and column elements in your
 matrixes.



 Following is a description of the FUNCTION procedures in the Matrix Math
 toolbox.