eldo_user

Eldo Control Language
Statement Overview
A vector element can be addressed using the usual notation a[i], where a is the vector name and
i is the index. i must have an integer value, otherwise it is rounded to a signed 32-bit integer
number. Any attempt to address a vector outside of its allocated index range is trapped and
causes an error (in the case that the .option set_eldo_cl_array_auto_expand is set to 0).
One-dimensional Vectors
Example:
set a[] = 2001
This command simply declares the vector a, and explicitly sets the initial value of any of its
elements to 2001. This initialization is mandatory. The actual range will be assigned
dynamically with further references and/or assignations.
set b[0,99]=0
This command declares the vector b, and explicitly sets the initial value of any of its element
to 0. In this example, reading the vector from index 0 to index 99 will return 0. Reading outside
of this range will extend the vector to the necessary size to make the reference “legal”, fill all
uninitialized cells with the default value, and return the initial value. For example:
set b[0, 99] = 0.1234 a = 1
a = b[150]
The reference to b[150] causes the b[] vector to be automatically extended. All cells from index
100 to 150 are filled with the value 0.1234, and the a variable is assigned the value of b[150]:
0.1234.
Assigning an element whose index is outside the current range of the vector automatically
extends its range. For example:
set a[0,99]=3.14
a[500]=17
In this example, the first statement creates a vector a[] of 100 elements, from a[0] to a[99]. All
elements are initialized to 3.14. The second assignment extends the range of a[] from 99 to 500,
and fills a[500] with the value 17. The elements a[100] to a[499] are filled with the initial value
of the vector, which is 3.14.
If a vector has no explicit initial range, as in:
set a[]=0
then a subsequent assignment of an element with index will create the element i. For
example:
826
Eldo® User's Manual, 15.3