Re: [igraph] Converting Igraph object to adjacency matrix of class "matrix"

[Filippo Santi]

Thank you Gabor, 

I set it to false and now it works.

Best,

Filippo

2018-02-27 10:33 GMT+01:00 Gábor Csárdi <address@hidden>:

Hi, set sparse = FALSE in as_adjacency_matrix.

Gabor

On Tue, Feb 27, 2018 at 8:30 AM, Filippo Santi <address@hidden> wrote:
> Hello Everyone,
>
> I am trying to obtain an adjacency matrix from a graph object, as I have to
> perform some manipulation before reconverting it to a graph to obtain the
> statistics I need.
>
> However, I am stuck with a dgcMatrix, as I am not able to convert it to a
> standard "matrix" class adjacency matrix.
>
> Below the code I am using:
>
> # Creating network from edgelist
> undesa.overind.1990 <- graph.data.frame(edge, vertices = vert, directed = T)
> undesa.overind.1990 <- set_edge_attr(undesa.overind.1990, 'weight', value =
> get.edge.attribute(undesa.overind.1990, 'stock_od'))
>
> # Extracting adjacency matrix
> adjac <- as_adjacency_matrix(undesa.overind.1990, edges = T, names = T, attr
> = 'weight')
> class(adjac) #dgMatrix
>
> I tried to convert with
>
> as(adjac, "matrix")
>
> However, what I get is a matrix with "the non-zero elements in the columns
> sorted into increasing row order", as explained by the dgCMatrix help file,
> rather than the adjacency matrix.
>
> How could I solve this issue, to retrieve the adjacency matrix from my
> graph? I could not find any useful help online.
>
> Best,
>
> Filippo
>
> --
> Filippo Santi
> PhD Candidate in Development Economics
>
>

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--

Filippo Santi

PhD Candidate in Development Economics