Convert function filter into character string.
s=char(z)
When applied to an imat_filt object, the CHAR function converts a filter z into a human-readable string representation. This process is not reversible (i.e., you cannot pass the resulting string to the imat_filt constructor to build an imat_filt variable).
Note that the character representation is what gets printed when you display a filter.
>> z=imat_filt('functiontype','=','frequency response')
z =
FunctionType
== 'Frequency Response Function'
>> s=char(z)
s =
FunctionType == 'Frequency Response Function'
>> whos
Name Size Bytes Class
s 1x45 90 char array
z 1x1 610 imat_filt object
Grand total is 93 elements using 700 bytes
>>