Error in match.arg(op, choices = c(graph.RBGL, gRbase)) : argument "op" is missing, with no default

[duducrail]

Hi, When I try to plot a my BN I got the message on the title.

boot<-boot.strength(data, R=10000, algorithm = 'iamb') (this part is ok) qgraph(boot) (this line gives the error)

Using Mac, R 3.6.3 qgraph 1.9 gRbase 1.8.6.7

[SachaEpskamp]

Do you have a reproducible example? The code below works fine for me:

library('bnlearn')

df <- data.frame(
  a = rnorm(100),
  b = rnorm(100)
)
df$c <- df$a + df$b + rnorm(100)

boot<-boot.strength(df, R=10000, algorithm = 'iamb') 

library("qgraph")

qgraph(boot)

[duducrail]

Hi Sacha, thanks for the fast reply. I tried the exactly same code as you put above and got the same error. I think it's on my side. I did install/update some packages that I can't remember. And after doing this I got the error.

Maybe I'll try to reinstall R and qgraph all over again? Do you think it might work?

[SachaEpskamp]

What do you get when you run this?

packageVersion("bnlearn")
packageVersion("qgraph")
find("qgraph")

[duducrail]

Hi Sacha, I re-install before seeing your message. When I did that it solved the issue. Thank you.

[duducrail]

Hello again, this is what appears:

packageVersion("bnlearn") [1] ‘4.8.1’ packageVersion("qgraph") [1] ‘1.9.3’ find("qgraph") [1] "package:gRbase" "package:qgraph"

I wanted to use querygrain, and after installed gRain, gRbase, Rgraphviz, I got the same issue I had before I re-install all over again.

[SachaEpskamp]

Hi, sorry for the late reply on this. I see the problem now, the gRbase package also exports a function called qgraph, and so if you load the gRbase package after you load qgraph the qgraph(...) function will no longer work. You can explicitely call qgraph(...) from the qgraph package with qgraph::qgraph(...). So this should work:

library('bnlearn')

df <- data.frame(
  a = rnorm(100),
  b = rnorm(100)
)
df$c <- df$a + df$b + rnorm(100)

boot<-boot.strength(df, R=10000, algorithm = 'iamb') 

library("qgraph")

qgraph::qgraph(boot)