- `TF = isa (OBJ, CLASSNAME)`

Return true if `OBJ` belongs to the class `CLASSNAME`.

The class name may also be a category such as `"float"`, `"integer"`, or
`"numeric"`. If `CLASSNAME` is a cell array of strings, return a logical array
indicating which class names match.

See also: `class`, `typeinfo`.

### References

- https://www.mathworks.com/help/matlab/ref/isa.html
- https://octave.sourceforge.io/octave/function/isa.html