[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [igraph] page.rank speed

From: Tamás Nepusz
Subject: Re: [igraph] page.rank speed
Date: Fri, 2 Aug 2013 21:18:01 +0200

>  At arpack.c:1178 : ARPACK error, The Schur form computed by LAPACK routine 
> dlahqr could not be reordered by LAPACK routine dtrsen.
Seems to be a long-standing issue with ARPACK and we haven't figured out yet 
how to solve this; see, e.g.:


It seems to occur on relatively sparse graphs and it also seems that removing 
isolated vertices usually resolves the problem. Also, the issue will probably 
not come up again if we switch to PRPACK. Can you try removing any isolated 
vertices in your graph (if any) and try again? If it still fails, send me your 
graph somehow and I'll investigate.


reply via email to

[Prev in Thread] Current Thread [Next in Thread]