Simulistics

const_delay function

const_delay(var,n)

Input: a variable name and a numerical constant (real or integer) of time units

Result: the value (any type) of the named variable, n time units ago

at_init function

at_init(X)

Returns the value the argument had when first used, i.e., on model reset or when the submodel instance containing this equation was created.

at_init(X) creates an implicit intermediate result, which has the same dimensions as its argument. So if this result is implicitly replicated elsewhere in the equation, the same value will be used each time. See makearray for behaviour in explicit replication.

rankings function

Takes an array of numeric values, and returns an array with the ranks of the corresponding elements in the argument. This is 1 for the largest element, and equal to the size of the array for the smallest.

Example:

rankings([1,9,2,10,3,8,5]) -> [7,2,6,1,5,3,4]

subtotals function

Takes an array of numeric values, and returns an array containing the running totals from summing the elements in the original array.

Example:

subtotals([1,9,2,10,3,8,5]) -> [1,10,12,22,25,33,38]

In: Contents >> Working with equations >> Functions >> Built-in functions

first function

first(T)

Takes an argument T that is a member of an enumerated type, and returns "true" if it is the first member of its type, and "false" otherwise.

Input: enumerated type member, or array of enumerated type members

Result: boolean, or array of boolean values

Examples:

If enumerated type "fruit" is defined as "apple", "grape", "banana":

first("apple") --> "true"

sgn function

sgn(X)

Returns -1 if X is negative, or 1 if X is zero or positive

Input: numeric, or array of numeric values

Result: integer, or array of integer values

Examples:

sgn(1.9) --> 1

sgn(-1.1) --> -1