Array functions ☆
Let M be an array, i be a numeric expression below.
| LBOUND(M,i) | The lower bound of the i-th dimension. |
| UBOUND(M,i) | The upper bound of the i-th dimension. |
| SIZE(M,i) | The number of the i-th subscripts. |
| SIZE(M) | The number of current elements. |
| MAXSIZE(M) | The upper limit of the number of elements. |
Example 1.
DIM A(8,9)
yields
lbound(A,1)=1, lbound(a,2)=1, ubound(a,1)=8, ubound(a,2)=9
size(A,1)=8, size(A,2)=9, size(A)=72, maxsize(A)=72
if no OPTION BASE exists.
Example 2.
10 DIM a(10) 20 MAT a=ZER(5)
yields SIZE(a)=5，MAXSIZE(a)=10.
if no OPTION BASE exists.
If M is 1-dimensional, the following abbreviations are allowed.
| LBOUND(M) | The lower bound of the subscript of M. |
| UBOUND(M) | The upper bound of the subscript of M. |
DET-function
Let M be a 2-dimensional array.
DET(A) The determinant of A
If A is not square, an exception shall be caused on execution.
DOT-function
Let A,B be 1-dimensional arrays
DOT(A,B) The dot (inner) product of A and B.
If the size of A and B are different, an exception shall be caused on execution.