Thread Subject: max duration of zero

Hi everyone,

If i have an array and every now and again there is a period
of zeros in my data; what would I write to get the longest
period of zeros that occur in my array?

e.g
a=[1;2;0;4;5;6;7;0;0;0;0;3;4;5;6;7;3;5;5;0;0;0]

maxzero in this case is 4.

any help would be much appreciated.

In article <fv844h$f3a$1@fred.mathworks.com>,
Adam Bright <abc_services_2000@yahoo.co.uk> wrote:

>If i have an array and every now and again there is a period
>of zeros in my data; what would I write to get the longest
>period of zeros that occur in my array?

>e.g
>a=[1;2;0;4;5;6;7;0;0;0;0;3;4;5;6;7;3;5;5;0;0;0]

>maxzero in this case is 4.

maxzero = max(diff(find([a;1]))) - 1
--
  "They called it golf because all the other four letter words
  were taken." -- Walter Hagen

roberson@ibd.nrc-cnrc.gc.ca (Walter Roberson) wrote in message <fv85hg$344
$1@canopus.cc.umanitoba.ca>...
> maxzero = max(diff(find([a;1]))) - 1
----------
  Better append a 1 in front of 'a' also, Walter. If the sequence starts with its
longest series of '0's at the beginning, you will miss it.

Roger Stafford

Thanks very much too both of you.

"Roger Stafford" <ellieandrogerxyzzy@mindspring.com.invalid>
wrote in message <fv895q$o8j$1@fred.mathworks.com>...
> roberson@ibd.nrc-cnrc.gc.ca (Walter Roberson) wrote in
message <fv85hg$344
> $1@canopus.cc.umanitoba.ca>...
> > maxzero = max(diff(find([a;1]))) - 1
> ----------
> Better append a 1 in front of 'a' also, Walter. If the
sequence starts with its
> longest series of '0's at the beginning, you will miss it.
>
> Roger Stafford
>