Upgrading from an Earlier Release :: Signal Processing Toolbox 6.2 Release Notes (Signal Processing Toolbox Release Notes)

Signal Processing Toolbox Release Notes

Upgrading from an Earlier Release

This section describes the upgrade issues involved in moving from the Signal Processing Toolbox 6.1 to Version 6.2.

If you are upgrading from Version 6.0 or earlier, see Upgrading from an Earlier Release in the Signal Processing Toolbox 6.1 Release Notes.

Discrete-Time Filter States Property

In previous version of the Signal Processing Toolbox, the output of the states property of a dfilt.df1, dfilt.df1t, dfilt.df1sos or dfilt.df1tsos object was a vector of doubles. In the current version, the output is a filtstates object, Hs. To obtain a vector of doubles from the Hs object, use

```
double(Hs)
```

You cannot load the states of an SOS object saved in a previous versions into the current version.

Note that the order of the double-precision numerator and denominator values differs from the order in previous versions. In the current version, numerator values are listed first, followed by denominator values.

Note also that the sign of the Denominator states for dfilt.df1t and dfilt.df1tsos is negated from what it was in previous versions. Refer to the structure diagrams shown on the reference pages.

Platform Limitations Signal Processing Toolbox 6.1 Release Notes