{% if username %}
x = <expression>
Where x is the name of the new file, and expression is a mathematical expression including variables that reference other datasets.
Examples:
x = a + b * 2
Here x will be a lazy expression with a and b as operands. That means that x will not be evaluated until it is needed.
x := a + b * 2
Here x will eagerly execute the expression with a and b as operands. That means that x will be evaluated immediately and stored.
x = arange(10)
Here x will be a lazy array, with int64 elements, from 0 to 9 (included).