Ggraph: Weight must be numeric error

[zephyris]

Hi,
I'm having problems using vertex/leaf weights - always returning the error "Weight must be numeric".

Setting up a graph using igraph:

library(ggraph)
library(igraph)
edges <- flare$edges
vertices <- flare$vertices
mygraph <- graph_from_data_frame(edges, vertices=vertices)

The data type of vertices$size is numeric:

> is.numeric(vertices$size)
[1] TRUE

However, attempting to plot the graph using ggraph reports that size is not numeric:

> ggraph(mygraph, layout = 'circlepack', weight = 'size')
Error in tree_to_hierarchy(graph, direction, sort.by, weight) :
  Weight must be numeric

Is this an issue or am I just going about this the wrong way? I'm using R 3.4.4 in the Ubuntu linux subsystem for Windows 10

[underbais]

Maybe unquote 'size'? (weight = size). Works for me, sometimes..

[zephyris]

Ah, brilliant! That worked, any idea why though?

[thomasp85]

Many inputs to layouts are tidy evaluated and must given as unquoted expressions. This is given in the documentation

[ravichandrasekaran]

Just ran into this problem today, too. Think this is because we are following the snippet in holtzy's very nice R-graph-gallery (https://www.r-graph-gallery.com/313-basic-circle-packing-with-several-levels.html).

Just opened a pull request against the r-graph-gallery repo, so hopefully no one else will hit this one.