sos2cell - Convert second-order sections matrix to cell array
Syntax
c = sos2cell(m)
c = sos2cell(m,g)
Description
c = sos2cell(m) changes
an L-by-6 second-order section matrix m
generated by tf2sos into a 1-by-L cell
array of 1-by-2 cell arrays c. You can use c to
specify a quantized filter with L cascaded second-order
sections.
The matrix m should have the form
m = [b1 a1;b2 a2; ... ;bL aL]
where both bi and ai,
with i = 1, ..., L, are 1-by-3
row vectors. The resulting c is
a 1-by-L cell array of cells of the form
c = { {b1 a1} {b2 a2} ... {bL aL} }
c = sos2cell(m,g) with the
optional gain term g, prepends
the constant value g to c.
When you use the added gain term in the command, c is
a 1-by-L cell array of cells of the form
c = {{g,1} {b1,a1} {b2,a2}...{bL,aL} }
Examples
Use sos2cell to convert the 2-by-6 second-order
section matrix produced by tf2sos into
a 1-by-2 cell array c of cells.
Display the second entry in the first cell in c:
[b,a] = ellip(4,0.5,20,0.6);
m = tf2sos(b,a);
c = sos2cell(m);
c{1}{2}
ans =
1.0000 0.1677 0.2575
See Also
tf2sos, cell2sos
 | sinc | | sos2ss |  |
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