Displaying 7 results from an estimated 7 matches for "shortestpath".
2018 Feb 06
1
gdistance::shortestPath throws error "not a symmetric matrix"
Hi,
Calling
gdistance::shortestPath
gives me the error
Error in asMethod(object) :
not a symmetric matrix; consider forceSymmetric() or symmpart()
The output of dput(.traceback()) is
pairlist("stop(\"not a symmetric matrix; consider forceSymmetric() or symmpart()\")",
"asMethod(object)",...
2011 Aug 05
1
matrix into vector with vertex names
Using Igraph, I create shortest paths, then convert the matrix into
three column vectors - "vertex1", "vertex2", "shortestpath" - as the
code below shows.
#code for generating shortest path matrix and creating a 3 columns
from an igraph graph object "y"
y_s<-shortest.paths(y, weights = NULL)
y_s <- melt(y_s)[melt(upper.tri(y_s))$value,] #Step 2: this is where
the trouble with memory occurs
y_s[,1] &l...
2017 Jun 21
0
Problem with shortestPath in igraph and qgraph
...ofighi <tofighizahra at gmail.com> wrote:
>hello,
>
>I have a graph and i use qgraph package to calculate centrality
>parameters.
>Now I want to know the maximum value of shortest path for each vertex
>with
>discarding the Inf value in short pathes. For this I use the
>ShortestPathLengths of centrality function in qgraph. but when I want
>to
>get the maximum the result is wrong. here is my code:
>
>cen<-centrality(Q)
>
>tmp3<-cen$ShortestPathLengths
>shp<-matrix(1:ncol(tmp3),ncol(tmp3),1)for(i in ncol(tmp3)){
>shp[i,]=max(tmp3[i,][tmp3[i,]!=In...
2017 Jun 20
2
Problem with shortestPath in igraph and qgraph
hello,
I have a graph and i use qgraph package to calculate centrality parameters.
Now I want to know the maximum value of shortest path for each vertex with
discarding the Inf value in short pathes. For this I use the
ShortestPathLengths of centrality function in qgraph. but when I want to
get the maximum the result is wrong. here is my code:
cen<-centrality(Q)
tmp3<-cen$ShortestPathLengths
shp<-matrix(1:ncol(tmp3),ncol(tmp3),1)for(i in ncol(tmp3)){
shp[i,]=max(tmp3[i,][tmp3[i,]!=Inf)}
when I display the valu of...
2018 Feb 14
2
long vectors not supported yet
Hi,
I am running R 3.3.3 and getting the following error:
Error in add_edges(res, edges = t(as.matrix(el[, 1:2])), attr = weight) :
long vectors not supported yet: ../../src/include/Rinlinedfuns.h:138
when passing a 13 GB TransitionLayer object to shortestPath from the
package 'gdistance'.
The error, albeit in a different context, is discussed here:
https://github.com/tidyverse/readr/issues/309
https://github.com/tidyverse/readr/pull/433
However it is not clear to me quite what the fix was and what kind of
limit may still exist in subseque...
2018 Feb 14
0
long vectors not supported yet
...; wrote:
>Hi,
>
>I am running R 3.3.3 and getting the following error:
>
>Error in add_edges(res, edges = t(as.matrix(el[, 1:2])), attr = weight)
>:
> long vectors not supported yet: ../../src/include/Rinlinedfuns.h:138
>
>when passing a 13 GB TransitionLayer object to shortestPath from the
>package 'gdistance'.
>
>The error, albeit in a different context, is discussed here:
>
> https://github.com/tidyverse/readr/issues/309
> https://github.com/tidyverse/readr/pull/433
>
>However it is not clear to me quite what the fix was and what kind of
&...
2018 Feb 15
1
long vectors not supported yet
...running R 3.3.3 and getting the following error:
>>
>> Error in add_edges(res, edges = t(as.matrix(el[, 1:2])), attr = weight)
>> :
>> long vectors not supported yet: ../../src/include/Rinlinedfuns.h:138
>>
>> when passing a 13 GB TransitionLayer object to shortestPath from the
>> package 'gdistance'.
>>
>> The error, albeit in a different context, is discussed here:
>>
>> https://github.com/tidyverse/readr/issues/309
>> https://github.com/tidyverse/readr/pull/433
>>
>> However it is not clear to me q...