Why does the error “At st-cuts.c:415 : Invalid root vertex id for dominator tree, Invalid value” occur in...
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I have the following matrix EdgesGroep as input for graph.adjacency (sorry for the ugly way of giving the matrix):
[1,] 0 0 0 0 0 0 0 0 0 0 0 0 0
[2,] 0 0 0 1 0 0 0 0 0 0 0 0 0
[3,] 0 0 0 0 0 0 0 0 0 0 0 0 0
[4,] 0 1 0 0 0 0 0 0 0 0 0 0 0
[5,] 0 0 0 0 0 1 0 0 1 1 1 0 0
[6,] 0 0 0 0 1 0 1 0 0 0 0 0 0
[7,] 0 0 0 0 0 1 0 0 0 0 1 0 0
[8,] 0 0 0 0 0 0 0 0 0 1 1 1 0
[9,] 0 0 0 0 1 0 0 0 0 1 0 0 0
[10,] 0 0 0 0 1 0 0 1 1 0 1 0 0
[11,] 0 0 0 0 1 0 1 1 0 1 0 0 0
[12,] 0 0 0 0 0 0 0 1 0 0 0 0 0
[13,] 0 0 0 0 0 0 0 0 0 0 0 0 0
EdgesGroep <- as.matrix(EdgesGroep)
colnames(EdgesGroep) <- 1:dim(EdgesGroep)[1]
g1 <- graph.adjacency(EdgesGroep, mode="directed", weighted=NULL)
tkplot(g1)
V <- V(g1)
E <- get.edgelist(g1)
mode(E) <- "integer"
stCuts(g1, source=V[7], target=V[8])
Then the error occurs
Error in stCuts(g1, source = V[7], target = V[8]) :
At st-cuts.c:415 : Invalid root vertex id for dominator tree, Invalid value
I actually want to obtain the cuts between all pair of nodes. I already have code to do that, but then the stCuts function should work.
Can anyone help discovering what to do to fix the error?
r igraph
asked Nov 12 at 14:26
Jorden
62
add a comment |
up vote
0
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I have the following matrix EdgesGroep as input for graph.adjacency (sorry for the ugly way of giving the matrix):
[1,] 0 0 0 0 0 0 0 0 0 0 0 0 0
[2,] 0 0 0 1 0 0 0 0 0 0 0 0 0
[3,] 0 0 0 0 0 0 0 0 0 0 0 0 0
[4,] 0 1 0 0 0 0 0 0 0 0 0 0 0
[5,] 0 0 0 0 0 1 0 0 1 1 1 0 0
[6,] 0 0 0 0 1 0 1 0 0 0 0 0 0
[7,] 0 0 0 0 0 1 0 0 0 0 1 0 0
[8,] 0 0 0 0 0 0 0 0 0 1 1 1 0
[9,] 0 0 0 0 1 0 0 0 0 1 0 0 0
[10,] 0 0 0 0 1 0 0 1 1 0 1 0 0
[11,] 0 0 0 0 1 0 1 1 0 1 0 0 0
[12,] 0 0 0 0 0 0 0 1 0 0 0 0 0
[13,] 0 0 0 0 0 0 0 0 0 0 0 0 0
EdgesGroep <- as.matrix(EdgesGroep)
colnames(EdgesGroep) <- 1:dim(EdgesGroep)[1]
g1 <- graph.adjacency(EdgesGroep, mode="directed", weighted=NULL)
tkplot(g1)
V <- V(g1)
E <- get.edgelist(g1)
mode(E) <- "integer"
stCuts(g1, source=V[7], target=V[8])
Then the error occurs
Error in stCuts(g1, source = V[7], target = V[8]) :
At st-cuts.c:415 : Invalid root vertex id for dominator tree, Invalid value
I actually want to obtain the cuts between all pair of nodes. I already have code to do that, but then the stCuts function should work.
Can anyone help discovering what to do to fix the error?
r igraph
asked Nov 12 at 14:26
Jorden
62
For many (source,target) combinations it works to switch the order: st_cuts(g1, source=V[8], target=V[11]) does not work but st_cuts(g1, source=V[11], target=V[8]) does work. (source,target) combinations that do not work that way are (9,11) , (10,11) and (7, 8-11). I have no idea why the switched order for some combinations work and others does not...
– Jorden
Nov 13 at 10:02
This is a bug in the igraph C core: github.com/igraph/igraph/issues/1102
– Szabolcs
Nov 15 at 12:55
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
I have the following matrix EdgesGroep as input for graph.adjacency (sorry for the ugly way of giving the matrix):
[1,] 0 0 0 0 0 0 0 0 0 0 0 0 0
[2,] 0 0 0 1 0 0 0 0 0 0 0 0 0
[3,] 0 0 0 0 0 0 0 0 0 0 0 0 0
[4,] 0 1 0 0 0 0 0 0 0 0 0 0 0
[5,] 0 0 0 0 0 1 0 0 1 1 1 0 0
[6,] 0 0 0 0 1 0 1 0 0 0 0 0 0
[7,] 0 0 0 0 0 1 0 0 0 0 1 0 0
[8,] 0 0 0 0 0 0 0 0 0 1 1 1 0
[9,] 0 0 0 0 1 0 0 0 0 1 0 0 0
[10,] 0 0 0 0 1 0 0 1 1 0 1 0 0
[11,] 0 0 0 0 1 0 1 1 0 1 0 0 0
[12,] 0 0 0 0 0 0 0 1 0 0 0 0 0
[13,] 0 0 0 0 0 0 0 0 0 0 0 0 0
EdgesGroep <- as.matrix(EdgesGroep)
colnames(EdgesGroep) <- 1:dim(EdgesGroep)[1]
g1 <- graph.adjacency(EdgesGroep, mode="directed", weighted=NULL)
tkplot(g1)
V <- V(g1)
E <- get.edgelist(g1)
mode(E) <- "integer"
stCuts(g1, source=V[7], target=V[8])
Then the error occurs
Error in stCuts(g1, source = V[7], target = V[8]) :
At st-cuts.c:415 : Invalid root vertex id for dominator tree, Invalid value
I actually want to obtain the cuts between all pair of nodes. I already have code to do that, but then the stCuts function should work.
Can anyone help discovering what to do to fix the error?
r igraph
asked Nov 12 at 14:26
Jorden
62
I have the following matrix EdgesGroep as input for graph.adjacency (sorry for the ugly way of giving the matrix):
[1,] 0 0 0 0 0 0 0 0 0 0 0 0 0
[2,] 0 0 0 1 0 0 0 0 0 0 0 0 0
[3,] 0 0 0 0 0 0 0 0 0 0 0 0 0
[4,] 0 1 0 0 0 0 0 0 0 0 0 0 0
[5,] 0 0 0 0 0 1 0 0 1 1 1 0 0
[6,] 0 0 0 0 1 0 1 0 0 0 0 0 0
[7,] 0 0 0 0 0 1 0 0 0 0 1 0 0
[8,] 0 0 0 0 0 0 0 0 0 1 1 1 0
[9,] 0 0 0 0 1 0 0 0 0 1 0 0 0
[10,] 0 0 0 0 1 0 0 1 1 0 1 0 0
[11,] 0 0 0 0 1 0 1 1 0 1 0 0 0
[12,] 0 0 0 0 0 0 0 1 0 0 0 0 0
[13,] 0 0 0 0 0 0 0 0 0 0 0 0 0
EdgesGroep <- as.matrix(EdgesGroep)
colnames(EdgesGroep) <- 1:dim(EdgesGroep)[1]
g1 <- graph.adjacency(EdgesGroep, mode="directed", weighted=NULL)
tkplot(g1)
V <- V(g1)
E <- get.edgelist(g1)
mode(E) <- "integer"
stCuts(g1, source=V[7], target=V[8])
Then the error occurs
Error in stCuts(g1, source = V[7], target = V[8]) :
At st-cuts.c:415 : Invalid root vertex id for dominator tree, Invalid value
I actually want to obtain the cuts between all pair of nodes. I already have code to do that, but then the stCuts function should work.
Can anyone help discovering what to do to fix the error?
r igraph
r igraph
asked Nov 12 at 14:26
Jorden
62
asked Nov 12 at 14:26
Jorden
62
edited Nov 13 at 11:41
asked Nov 12 at 14:26
Jorden
62
asked Nov 12 at 14:26
Jorden
62
asked Nov 12 at 14:26
Jorden
62
62
For many (source,target) combinations it works to switch the order: st_cuts(g1, source=V[8], target=V[11]) does not work but st_cuts(g1, source=V[11], target=V[8]) does work. (source,target) combinations that do not work that way are (9,11) , (10,11) and (7, 8-11). I have no idea why the switched order for some combinations work and others does not...
– Jorden
Nov 13 at 10:02
This is a bug in the igraph C core: github.com/igraph/igraph/issues/1102
– Szabolcs
Nov 15 at 12:55
add a comment |
For many (source,target) combinations it works to switch the order: st_cuts(g1, source=V[8], target=V[11]) does not work but st_cuts(g1, source=V[11], target=V[8]) does work. (source,target) combinations that do not work that way are (9,11) , (10,11) and (7, 8-11). I have no idea why the switched order for some combinations work and others does not...
– Jorden
Nov 13 at 10:02
This is a bug in the igraph C core: github.com/igraph/igraph/issues/1102
– Szabolcs
Nov 15 at 12:55
For many (source,target) combinations it works to switch the order: st_cuts(g1, source=V[8], target=V[11]) does not work but st_cuts(g1, source=V[11], target=V[8]) does work. (source,target) combinations that do not work that way are (9,11) , (10,11) and (7, 8-11). I have no idea why the switched order for some combinations work and others does not...
– Jorden
Nov 13 at 10:02
For many (source,target) combinations it works to switch the order: st_cuts(g1, source=V[8], target=V[11]) does not work but st_cuts(g1, source=V[11], target=V[8]) does work. (source,target) combinations that do not work that way are (9,11) , (10,11) and (7, 8-11). I have no idea why the switched order for some combinations work and others does not...
– Jorden
Nov 13 at 10:02
This is a bug in the igraph C core: github.com/igraph/igraph/issues/1102
– Szabolcs
Nov 15 at 12:55
This is a bug in the igraph C core: github.com/igraph/igraph/issues/1102
– Szabolcs
Nov 15 at 12:55
add a comment |
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For many (source,target) combinations it works to switch the order: st_cuts(g1, source=V[8], target=V[11]) does not work but st_cuts(g1, source=V[11], target=V[8]) does work. (source,target) combinations that do not work that way are (9,11) , (10,11) and (7, 8-11). I have no idea why the switched order for some combinations work and others does not...
– Jorden
Nov 13 at 10:02
This is a bug in the igraph C core: github.com/igraph/igraph/issues/1102
– Szabolcs
Nov 15 at 12:55