Thanks Sebastian.. You pls send your code,I will also check where i went wrong..
On Mon, Jan 20, 2014 at 8:51 PM, Sebastian Schelter <s...@apache.org> wrote: > On 01/20/2014 11:48 AM, Jyoti Yadav wrote: > >> Hi Sebastian... >> >> while referring the paper,paper talks about the normalization of L(G) >> matrix..Below is the few lines from the paper which talks about it.. >> >> >> Computing Normalization Factors. The ith element of the >> diagonal matrix D contains the sum of ith column of L(G). >> D is used to column-normalize L(G) so that the resulting >> matrix can be used for the power iteration. The ’./’ in line 5 >> represents the element-wise inverse operation. >> > > Ah I see. You're right conceptually this is the same as normalizing L(G), > although this is not explicitly done in Algorithm 2 shown in the paper. > > > >> >> One more question... >> >> Is LineRank algo is applicable to undirected and weighted graph? >> > > The paper explicitly mentions that LineRank is applicable to weighted > graphs. Furthermore, you can transform any undirected to a directed graph > by substituting an undirected edge by two directed ones. > > Regarding your problems with convergence, I can give you access to my > matlab code and some toy data that it converges on, so that you can test > your implementation. > > --sebastian > > > > >> Thanks >> >> >> >> >> On Mon, Jan 20, 2014 at 2:40 PM, Sebastian Schelter <s...@apache.org> >> wrote: >> >> Jyoti, >>> >>> We started with a Matlab implementation on a small example graph and saw >>> the algorithm converge. I don't think that the paper mentions that you >>> have >>> to normalize the matrix in a certain way. >>> >>> In the standard power iteration, the vector that estimates the principal >>> eigenvector has to be rescaled to unit length. IIRC this is also done in >>> the LineRank algorithm in the paper. >>> >>> --sebastian >>> >>> >>> >>> On 01/20/2014 10:04 AM, Jyoti Yadav wrote: >>> >>> Hi Sebastian.. >>>> I code this algorithm,but while running,it is not converging.. >>>> One more question,for power iteration.is it necessary to column >>>> normalize >>>> the matrix or we can work with row normalized matrix? >>>> >>>> Thanks >>>> Jyoti >>>> >>>> >>>> On Mon, Jan 20, 2014 at 1:45 PM, Sebastian Schelter <s...@apache.org> >>>> wrote: >>>> >>>> I have a student working on an implementation, do you have questions? >>>> >>>>> >>>>> >>>>> On 01/20/2014 08:11 AM, Jyoti Yadav wrote: >>>>> >>>>> Hi.. >>>>> >>>>>> Is there anyone who is working with linerank algorithm?? >>>>>> >>>>>> Thanks >>>>>> Jyoti >>>>>> >>>>>> >>>>>> >>>>>> >>>>> >>>> >>> >> >
