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QR Factorization on sparse matrices?

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Hello.

I'm trying to solve linear least squares problem on large (about 300k x 100k) sparse matrix. Is there a way to run QR Factorization on sparse matrix? Cannot find one listed in "Matrix Storage Schemes".

BTW: can I ask this question via premier support? Or it just about posting issues, not asking questions?

Thanks a lot.
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Gennady_F_Intel
Moderator
68 Views
I think there are no direct way to do that.
you can try to convert from spare to dense representation ( e.g. CSR format ) and then to use ScaLapack QR factorization.
>>BTW: can I ask this question via premier support? Or it just about posting issues, not asking questions?
no need to do that because of these are two different interfaces to the one input -:).

View solution in original post

2 Replies
Gennady_F_Intel
Moderator
69 Views
I think there are no direct way to do that.
you can try to convert from spare to dense representation ( e.g. CSR format ) and then to use ScaLapack QR factorization.
>>BTW: can I ask this question via premier support? Or it just about posting issues, not asking questions?
no need to do that because of these are two different interfaces to the one input -:).

View solution in original post

68 Views
>>I think there are no direct way to do that.

Sad... but thanks
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