by Thomas Thomsen | May 10, 2019 | Architecture, Dimensions
Array-series have not been described in this blog until now. The concept of array-series arose as a consequence of database integration on the one side, and GAMS integration on the other side. When interfacing with a particular Danish online database...
by Thomas Thomsen | May 3, 2019 | Architecture, Syntax
In Gekko, {}-curlies have been used for quite a long time now. The idea is that variable names can be composed by means of the {}-curlies, creating a means of composing names dynamically, in a sense forwarding from a string to a variable name corresponding to that...
by Thomas Thomsen | May 3, 2019 | Architecture, Syntax
As mentioned in the overview post regarding Gekko 3.0, lists were generalized in Gekko 3.0, using primarily Python as the inspiration. In Gekko 2.x, lists could only contain strings, so in that sense, they were quite simple. Gekko 3.0 allows any variable to be an...
by Thomas Thomsen | May 2, 2019 | Lags
In Gekko 2.0/2.2/2.4, and also in some other software packages, series expressions are run in an outer loop. Consider a series expression like y = x1 + x2 + x3. In AREMOS, such an expression is run n times in an outer loop, where n is the number of periods. Imagine...
by Thomas Thomsen | May 1, 2019 | Architecture, Data management, History, Syntax
The official Gekko 3.0 is now released. This is a long post, but the intent is to try to explain what Gekko 3.0 really is about. Which is actually not so easy to boil down exactly: it is perhaps best to think of it as a long-term vision, borne out of the realization...
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