readfis

Load fuzzy inference system from file

Syntax

fis = readfis(fileName)

fis = readfis

Description

fis = readfis(fileName) loads a fuzzy inference system (FIS) from the file specified by fileName. You can load a fuzzy system from either a FIS file (*.fis) or a MAT file (*.mat).

fis = readfis opens a dialog box for selecting and loading a FIS or MAT file.

Examples

Load Fuzzy Inference System from File

Load the fuzzy system stored in the file tipper.fis.

fis = readfis('tipper')

fis = 
  mamfis with properties:

                       Name: "tipper"
                  AndMethod: "min"
                   OrMethod: "max"
          ImplicationMethod: "min"
          AggregationMethod: "max"
      DefuzzificationMethod: "centroid"
    DisableStructuralChecks: 0
                     Inputs: [1x2 fisvar]
                    Outputs: [1x1 fisvar]
                      Rules: [1x3 fisrule]

	See 'getTunableSettings' method for parameter optimization.

Input Arguments

fileName — File name

string | character vector

File name, specified as a string or character vector. You can load fuzzy systems from the following file types.

• FIS file (*.fis) — Load a mamfis, sugfis, mamfistype2, or sugfistype2 object.

• MAT file (*.mat) — Load a mamfis, sugfis, mamfistype2, sugfistype2, or fistree object. The MAT file must contain only one fuzzy system. (since R2024b)

The file must be in the current working folder or on the MATLAB^® path.

Output Arguments

fis — Fuzzy inference system

mamfis object | sugfis object | mamfistype2 object | sugfistype2 object | fistree object

Fuzzy inference system, returned as one of the following:

• mamfis object — Mamdani fuzzy inference system

• sugfis object — Sugeno fuzzy inference system

• mamfistype2 object — Type-2 Mamdani fuzzy inference system

• sugfistype2 object — Type-2 Sugeno fuzzy inference system

• fistree object — FIS tree (since R2024b)

Tips

• Do not manually edit the contents of a FIS file. Doing so can produce unexpected results when loading the file using a function, such as readfis and getCodeGenerationData, or an app, such as Fuzzy Logic Designer.

Version History

Introduced before R2006a

R2024b: MAT file support

You can load a FIS from a MAT file using the readfis function. The MAT file must contain only one FIS or FIS tree object.

R2024b: FIS tree support

You can load a FIS tree object from a MAT file using the readfis function.

R2024b: Fuzzy inference system structures not supported

readfis no longer supports fuzzy inference system structures. Use mamfis and sugfis objects instead. To convert existing fuzzy inference system structures to objects, use the convertfis function.

R2019b: Fuzzy inference system structures will not be supported

Support for fuzzy inference systems structures will be removed in a future release. This change was announced in R2018b. Using fuzzy inference system structures with readfis issues a warning starting in R2019b.