What is stored integer value of a fi object?

I am not able to understand the purpose of the 'fi object' creation and other associated concepts, such as, stored integer of a fi object, its binary/dec representation etc.

Take, for instance, this example code:

>> a = fi(pi, 1, 8, 3)

a = 

    3.1250

          DataTypeMode: Fixed-point: binary point scaling
            Signedness: Signed
            WordLength: 8
        FractionLength: 3
>> in_x = storedInteger(a)

in_x =

   25

>> bin(a)

ans =

00011001

>> dec(a)

ans =

025

Please explain what is happening over here.

Answer 1

[Andy Bartlett]

Please see https://www.mathworks.com/help/fixedpoint/ug/scaling_f6389.html