Matrix Elements VB-800 Instrukcja Użytkownika Pobierz pdf (Strona 154)

146 Appendix A6 OxGauss Language Reference

./ dot-division operator. The same applies for dot-multiplication, but note that 2.0*m2

and 2.0.*m2 give the same result.

A6.8.6 Additive expressions

The additive operators + and - are dot-operators, conforming to Table A6.3. They

respectively return the sum and the difference of the operands, which must both have

arithmetic type. Matrices must be conformant in both dimensions, and the operator is

applied element by element. For example:

decl m1 = <1,2; 2,1>, m2 = <2,3; 3,2>;

r = 2 - m2; // <0,-1; -1,0>

r = m1 - m2; // <-1,-1; -1,-1>

A6.8.7 Modulo expressions

The module operators % is a dot-operators, conforming to Table A6.3. It returns the

integer remainder remainder when the ﬁrst operand is divided by the second. Matrices

must be conformant in both dimensions, and the operator is applied element by element.

Non-integer values are rounded to the nearest integer before applying the operator.

A6.8.8 Concatenation expressions

left operator right result

int/double ~ int/double matrix 1 × 2

int/double ~ matrix m × n matrix m × (1 + n)

matrix m × n ~ int/double matrix m × (n +1)

matrix m × n ~ matrix p × q matrix max(m, p) × (n + q)

int/double | int/double matrix 2 × 1

int/double | matrix m × n matrix (1 + m) × n

matrix m × n | int/double matrix (m +1)× n

matrix m × n | matrix p × q matrix (m + p)×max(n, q)

int ~| string string

string ~| int string

string ~| string string

array ~| array array

array ~| any basic type array

Horizontal concatenation is denoted by ~ while | is denoted by vertical concatena-

tion.

If both operands have arithmetic type, the concatenation operators are used to create

a larger matrix out of the operands. If both operands are scalar the result is a row vector

(for ~) or a column vector (for |). If one operand is scalar, and the other a matrix, an

1 2 ... 149 150 151 152 153 154 155 156 157 158 159 ... 171 172

Brak uwag

Matrix Elements VB-800 Instrukcja Użytkownika Strona 154