1 MAT
 The MAT statement lets you implicitly create  and  manipulate  one-  and
 two-dimensional  arrays.  You can use the MAT statement to assign values
 to array elements, or to redimension  a  previously  dimensioned  array.
 You   can   also   perform   matrix   arithmetic   operations   such  as
 multiplication, addition, and subtraction, and other  matrix  operations
 such as transposing and inverting matrices.

 For information on the graphics MAT PLOT or MAT...POINT statements, type
 either  "Graphics  MAT_PLOT"  or  "Graphics  MAT...POINT"  at  the  help
 facility prompt "Topic?".

 Examples:

 MAT First_array = ZER
 MAT String_array = NUL$
 MAT A = B + C
 MAT C = (55.2) * First_array

2 Syntax

 Initialization (Numeric):

                     { CON }
     MAT num-array = { IDN } [ ( int-exp1 [, int-exp2 ] ) ]
                     { ZER }

 Initialization (String):

     MAT str-array = NUL$ [ ( int-exp1 [, int-exp2 ] ) ]

 Array Arithmetic:

                                 [ { + }            ]
     MAT num-array1 = num-array2 [ { - } num-array3 ]
                                 [ { * }            ]

     MAT num-array1 = num-array2 * num-array3 [* num-array4] ,...

 Scalar Multiplication:

     MAT num-array4 = ( num-exp ) * num-array5

 Inversion and Transposition:

                      { TRN }
     MAT num-array6 = { INV } ( num-array7 )

2 INPUT
 The  MAT  INPUT  statement  assigns  values   from   a   terminal   or
 terminal-format file to array elements.

 Example

 MAT INPUT Emp_name$(10,10)

3 Syntax

     MAT INPUT [ chnl-exp, ] { array [ (int-exp1 [,int-exp2]) ] },...

2 LINPUT
 The MAT LINPUT statement receives  string  data  from  a  terminal  or
 terminal-format file and assigns it to string array elements.

 Example

 MAT LINPUT Time_card$(10%)

3 Syntax

     MAT LINPUT [chnl-exp,] {  str-array  [  (int-exp1  [,int-exp2])  ]
     },...

2 PRINT
 The  MAT  PRINT  statement  prints  the  contents   of   a   one-   or
 two-dimensional  array  on  your terminal or assigns the value of each
 array element to a record in a terminal-format file.

 Example

 MAT PRINT Arr1(5,5)

3 Syntax

     MAT PRINT [chnl-exp,] {array [(int-exp1 [,int-exp2])] [{ , }]}...
                                                            { ; }

2 READ
 The MAT READ statement assigns values from DATA  statements  to  array
 elements.

 Example

 MAT READ Animal$(2,2)
 DATA CAT,DOG,GOAT,RABBIT

3 Syntax

     MAT READ { array [ ( int-exp1 [, int-exp2 ] ) ] },...