..

.. is the replicator operator. It reuses the entire left-hand side expression on the right-hand side so you do not have to write it twice.

Syntax

x = any expression with ..
x(id) = any expression with ..
x(id1:id2) = any expression with ..
x(id1:id2,jd1:jd2) = any expression with ..
x(t1~t2) = any expression with ..

Notes

• Whatever appears on the left-hand side is replicated wherever .. appears on the right-hand side.
• For example, very_long_variable_name = any_function(..) is equivalent to very_long_variable_name = any_function(very_long_variable_name).
• Dot notation also works, so x = ...any_function is valid when that function supports object-function style.
• This behaves like a generalized compound assignment. For example, x = x + 50 can be written as x += 50 or x = .. + 50.
• The replicator is especially useful when no dedicated compound operator exists, such as x = sqrt(x), which can be written as x = sqrt(..).
• It can also avoid redundant evaluation. In a statement like x(400~500) = x(400~500).sqrt, the indexed expression is evaluated twice, while x(400~500) = ...sqrt avoids that duplication.

Examples

long_var_name = [values ..]
long_var_name = values ++ ..

AUX> x=wave("mop");
AUX> x(400~500) = ...sqrt;

Current source basis:

• op_replicator.html