The user can change the value of an input variable by moving a cursor, or entering the numerical value, and see the effect onto the fuzzy inference system output. The matching degree of each rule is displayed, as well as the result of rule aggregation.
The inference window is for educational purposes mainly and is limited to the use of small size systems, in terms of variable and rule number.
This window is implemented as a table structure, this allows rule sorting using a click in any column header.
Any change in other windows takes effect immediately. The inference being done dynamically, the results displayed correspond to the current configuration.
Two inference mechanisms are implemented in Fispro. The mechanism used by conjunctive rules is called FITA (First Infer Then Aggregate) and allows to separately infer a conclusion value for each rule before aggregating these values. The same mechanism is also used for implicative rules when input data are precise values. If this is not the case, when at least one input value is imprecise, a different mechanism is requiered, called FATI (First Aggregate Then Infer).
For a detailed comparison of the two types of rules, the inference mechanisms and the FATI implementation chosen in Fispro, see .
In the interface, when the FATI algorithm is used, the rule conclusion corresponding to the input data is not displayed as it cannot be calculated.
The inference window menu includes an option called Fuzzy Data, with is again divided into two options:
In the inference itself, the cursor allows to move the central value, and the fuzzy number will be automatically built using this central value and the given template. Manual inference with fuzzy data is available for all types of rules. It is limited to 2 inputs and 1 output if the system has at least one implicative output.
This option is not available yet for the inference from a data file.