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Re: How to extract sequenced data from an array?
From: |
Ben Abbott |
Subject: |
Re: How to extract sequenced data from an array? |
Date: |
Wed, 22 Dec 2010 08:39:53 -0500 |
On Dec 22, 2010, at 8:23 AM, new_user wrote:
> Hello Ben,
>
> Wednesday, December 22, 2010, 1:43:27 PM, you wrote:
>
>> I don't understand what is unique about the result you'd like to get.
>
>> It looks to me like Y is identical to X, but truncated to 5 rows, Y =
>> X(1:5,:)
>
>> Assuming you'd like to find the unique values for each column of x ...
>
>> cellfun (@unique, mat2cell (X, rows(X),
>> ones(1,columns(X))), "uniformoutput", false)
>
>> Ben
>
> Sorry if my English is bad, but if example array isn't clear to read:
> I want unique sequence, not unique values - I want whole part of the
> array that is repeating:
>
> A B C D D D A B C D D D A B C D D D
> |_________| |_________| |_________|
> | | |
> unique unique unique
> sequence sequence sequence
> data data data
>
> I also tried your suggestion, which I suspect returns unique values,
> plus I want to process 2 dimensional array and get 2 dimensional array
>
> Thanks for your reply
Someone with expertise in signal processing may have a solution, that is more
efficient with time and/or memory.
function y = period (x)
r = rows(x);
p = 0;
a = [];
while (p < r && ! isequal (x, a))
p = p + 1;
y = x(1:p,:);
a = repmat (y, ceil (r/p), 1)(1:r,:);
endwhile
endfunction
Ben
- How to extract sequenced data from an array?, new_user, 2010/12/22
- Re: How to extract sequenced data from an array?, Ben Abbott, 2010/12/22
- Re: How to extract sequenced data from an array?, Sergei Steshenko, 2010/12/22
- Re: How to extract sequenced data from an array?, new_user, 2010/12/22
- Re: How to extract sequenced data from an array?,
Ben Abbott <=
- Re: How to extract sequenced data from an array?, new_user, 2010/12/22
- Re: How to extract sequenced data from an array?, Andy Buckle, 2010/12/22
- Re: How to extract sequenced data from an array?, new_user, 2010/12/22
- Re: How to extract sequenced data from an array?, Doug Stewart, 2010/12/22
- Re: How to extract sequenced data from an array?, Andy Buckle, 2010/12/22
- Re: How to extract sequenced data from an array?, fork, 2010/12/22
- Re: How to extract sequenced data from an array?, new_user, 2010/12/22
- Re: How to extract sequenced data from an array?, fork, 2010/12/22
- Re: How to extract sequenced data from an array?, new_user, 2010/12/22
- Re: How to extract sequenced data from an array?, Doug Stewart, 2010/12/22