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Student Support Forum: 'Position[] with Sparse Arrays' topicStudent Support Forum > General > "Position[] with Sparse Arrays"

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David Koslicki
08/27/09 09:47am

Does anyone know how to use Position[] with Sparse Arrays?

I have a huge sparse array (call it A) and am trying to find all the rows that appear more than once. It appears that Position[A, A[[1]]] does not work, while Position[Normal[A],Normal[A[[1]]]] works but takes inordinately long.

Any thoughts?

Thanks,

~David Koslicki

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Subject (listing for 'Position[] with Sparse Arrays')
Author Date Posted
Position[] with Sparse Arrays David Koslicki 08/27/09 09:47am
Re: Position[] with Sparse Arrays yehuda ben-s... 08/30/09 06:46am
Re: Re: Position[] with Sparse Arrays David Koslicki 08/31/09 08:22am
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