HP Business BASIC/XL Reference Manual - HP 3000 MPE/iX Computer Systems - Edition 1 (32715-90001)

5- 18
Syntax
INTERPRETED
Examples
10 A=INTERPRETED
20 IF A=1 THEN GOSUB 100 !Control transfers to 100 if this program is interpreted
30 ELSE GOSUB 200 !Control transfers to 200 if this program is compiled
.
.
.
INV
The INV function returns an array that is the inverse of a specified
array. Both arrays must be of the same floating-point type. HP Business
BASIC/XL converts a DECIMAL or SHORT DECIMAL array to REAL before
computing the inverse.
This function has the form
MAT num_array1 = INV( num_array2 )
where num_array1 is the inverse of num_array2 . Num_array1 and num_array2
are both dimensioned ( m,m ) MUL( num_array1 , num_array2 ) is an identity
matrix. An identity matrix is a square matrix in which each element on
the upper-left to lower-right diagonal is one and all others are zero.
For example:
1 0 0
0 1 0
0 0 1
The function is used in the MAT = statement, with two dimensional arrays.
Syntax
INV( array )
Parameters
array Structured collection of variables of the same type.
The structure is determined when the array is declared.
Examples
10 DIM A(3,3),B(3,3)
.
.
.
50 MAT A = INV(B)
If B is
1 2
3 4
then A is
-2 1
1.5 -0.5
ITM
The ITM function returns the number of data items between the beginning
of a record and its current position in the same record. In other words,
it returns the number of datum between the beginning of the current
record and the current datum pointer (after a direct read, this number is
one).
Syntax
ITM( fnum )