## View Fixed-Point Data

In Fixed-Point Designer™ software, the `fipref` object determines the display properties of `fi` objects. Code examples generally show `fi` objects as they appear with the following `fipref` object properties:

• `NumberDisplay``'RealWorldValue'`

• `NumericTypeDisplay``'full'`

• `FimathDisplay``'full'`

Setting `'FimathDisplay'` to `'full'` provides a quick and easy way to differentiate between `fi` objects with a local fimath and those that are associated with the default fimath. When `'FimathDisplay'` is set to `'full'`, MATLAB® displays `fimath` object properties for `fi` objects with a local fimath. MATLAB never displays `fimath` object properties for `fi` objects that are associated with the default fimath. Because of this display difference, you can tell when a `fi` object is associated with the default fimath just by looking at the output.

Additionally, unless otherwise specified, examples throughout the Fixed-Point Designer documentation use the following default configuration of fimath:

``` RoundingMethod: Nearest OverflowAction: Saturate ProductMode: FullPrecision SumMode: FullPrecision ```

For more information on display settings, refer to Set fi Object Display Preferences Using fipref.

### Displaying the fimath Properties of fi Objects

To see the output as it appears in most Fixed-Point Designer code examples, set your `fipref` properties as follows and create two `fi` objects:

```p = fipref('NumberDisplay','RealWorldValue',... 'NumericTypeDisplay','full','FimathDisplay','full'); a = fi(pi,'RoundingMethod','Floor','OverflowAction','Wrap') b = fi(pi) ```

MATLAB returns the following:

```a = 3.1415 DataTypeMode: Fixed-point: binary point scaling Signedness: Signed WordLength: 16 FractionLength: 13 RoundingMethod: Floor OverflowAction: Wrap ProductMode: FullPrecision SumMode: FullPrecision b = 3.1416 DataTypeMode: Fixed-point: binary point scaling Signedness: Signed WordLength: 16 FractionLength: 13```

MATLAB displays `fimath` object properties in the output of `fi` object `a` because `a` has a local fimath.

MATLAB does not display any `fimath` object properties in the output of `fi` object `b` because `b` associates itself with the default fimath.

### Hiding the fimath Properties of fi Objects

If you are working with multiple `fi` objects that have local fimaths, you may want to turn off the `fimath` object display:

• `NumberDisplay``'RealWorldValue'`

• `NumericTypeDisplay``'full'`

• `FimathDisplay``'none'`

For example,

```p = fipref('NumberDisplay','RealWorldValue',... 'NumericTypeDisplay','full','FimathDisplay','none')```
```p = NumberDisplay: 'RealWorldValue' NumericTypeDisplay: 'full' FimathDisplay: 'none' LoggingMode: 'Off' DataTypeOverride: 'ForceOff'```
```F = fimath('RoundingMethod','Floor','OverflowAction','Wrap'); a = fi(pi, F)```
```a = 3.1415 DataTypeMode: Fixed-point: binary point scaling Signedness: Signed WordLength: 16 FractionLength: 13```

Although this setting helps decrease the amount of output produced, it also makes it impossible to tell from the output whether a `fi` object uses the default fimath. To do so, you can use the `isfimathlocal` function. For example,

```isfimathlocal(a) ```
```ans = logical 1```

When the `isfimathlocal` function returns `1`, the `fi` object has a local fimath. If the function returns `0`, the `fi` object uses the default fimath.

### Shortening the numerictype Display of fi Objects

To reduce the amount of output even further, you can set the `NumericTypeDisplay` to `'short'`. For example,

```p = fipref('NumberDisplay','RealWorldValue',... 'NumericTypeDisplay','short','FimathDisplay','full'); a = fi(pi) ```
```a = 3.1416 numerictype(1,16,13)```