Thread Subject: bwboundaries

[B,L,N,A] = bwboundaries(bw,4);
I have to insert the matrices contained in A into another
cell. If it contains false then pass empty matrix.
What is the syntax???

In article <g4cib2$sgh$1@fred.mathworks.com>,
Rinachi Garg <rinachi_garg@yahoo.co.in> wrote:
>[B,L,N,A] = bwboundaries(bw,4);
>I have to insert the matrices contained in A into another
>cell. If it contains false then pass empty matrix.
>What is the syntax???

I am confused. The variable A will, after the call, contain
a square sparse adjacency matrix. What do you mean by
"the matrices contained in A" ? Do you mean that you want to
extract the enclosing-boundary information from A? Something like,

arrayfun( @(idx) find(A(idx,:)), 1:size(A,1), 'Uniform', 0)
--
  "He wove a great web of knowledge, linking everything together,
  and sat modestly at a switchboard at the center, eager to help."
                                              -- Walter Kerr

roberson@ibd.nrc-cnrc.gc.ca (Walter Roberson) wrote in
message <g4d31b$rf1$1@canopus.cc.umanitoba.ca>...
> In article <g4cib2$sgh$1@fred.mathworks.com>,
> Rinachi Garg <rinachi_garg@yahoo.co.in> wrote:
> >[B,L,N,A] = bwboundaries(bw,4);
> >I have to insert the matrices contained in A into
another
> >cell. If it contains false then pass empty matrix.
> >What is the syntax???
>
> I am confused. The variable A will, after the call,
contain
> a square sparse adjacency matrix. What do you mean by
> "the matrices contained in A" ? Do you mean that you want
to
> extract the enclosing-boundary information from A?
Something like,
>
> arrayfun( @(idx) find(A(idx,:)), 1:size(A,1), 'Uniform',
0)
> --
> "He wove a great web of knowledge, linking everything
together,
> and sat modestly at a switchboard at the center, eager
to help."
> -- Walter
Kerr


yes..
I want to extract the enclosing boundary from A and give it
to another matrix.