David.
On Nov 15, 2009, at 8:06 PM, David Winsemius wrote:
> I could of course be wrong but have you yet specified the number of
> columns for this pairing exercise?
>
> On Nov 15, 2009, at 5:26 PM, cindy Guo wrote:
>
>> Hi, All,
>>
>> I have an n by m matrix with each entry between 1 and 15000. I want
>> to know
>> the frequency of each pair in 1:15000 that occur together in rows.
>> So for
>> example, if the matrix is
>> 2 5 1 6
>> 1 7 8 2
>> 3 7 6 2
>> 9 8 5 7
>> Pair (2,6) (un-ordered) occurs together in rows 1 and 3. I want to
>> return
>> the value 2 for this pair as well as that for all pairs. Is there a
>> fast way
>> to do this avoiding loops? Loops take too long.
>>
>> and provide commented, minimal, self-contained, reproducible code.
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>
> David Winsemius, MD
> Heritage Laboratories
> West Hartford, CT
>
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> and provide commented, minimal, self-contained, reproducible code.
David Winsemius, MD
Heritage Laboratories
West Hartford, CT