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From: Jessica on 18 Jun 2008 15:52
dpb <none(a)non.net> wrote in message
<g39vfm$fnj$1(a)aioe.org>...
> Jessica wrote:
> ...
> > and I would like to be able to identify both clumps of
> > zeros by having their start and stop row numbers.
>
> As a starting point,
>
> z = find(x==0); % find the locations of zeroes
> dz = diff(z) ; % if dz==1, consecutive zeroes
>
> Work back from initial location of where dz==1 occurs to
the
> corresponding location in z. The first in a sequence
will be one less
> than the location in dz and the last the last.
>
> --

Great suggestion. I got it to work!
From: us on 18 Jun 2008 16:09
"Jessica ":
<SNIP gap-finder evergreen...

one of the many solutions

% the data
d=[0,1,2,0,0,3,4,0,6,0];
% the engine
dd=[true,d~=0,true];
ixb=strfind(dd,[1,0]);
ixe=strfind(dd,[0,1])-1;
% the result
r=[ixb;ixe;ixe-ixb+1]
%{
1 4 8 10 % start
1 5 8 10 % end
1 2 1 1 % #zeros
%}

us
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