r - 'not a graph obect' error when performing degree() from igraph package -

Since I need a normalized score, I call the degree () function on my sensory matrix I got a text file that I had loaded in the R from read.delim . It was perfectly fine with the sna package.

When I Run

  K3_T2_ACAD  

And then

  K3_T2_ACAD_indeg & lt; - Degree (K3_T2_ACAD, g = 1, nodes = null, gmode = "digraph", diag = false, tmaxdev = FALSE, cmode = "indegree")  

This works!

I tried to isolate the sna because I thought this was a problem. However, when I run the igraph degree () function, then it does not work:

  K3_T2_ACAD_indeg2  

returns

error in degree (K3_T2_ACAD, mode = " These ", loops = FALSE, normalized = TRUE): Not a graph object

The first column and line each have participant codes. Is it possible that igraph can not work with it while sna can?

sna package uses approximation metrics, igraph < / Code> does not. You need to create an igraph object to work See examples.