geo.change.attr | R Documentation |
The functions geo.change.attr
changes values of a given node
attribute for a set of selected nodes of a gGraph object.
geo.change.attr(
x,
mode = c("points", "area"),
attr.name,
attr.value,
only.name = NULL,
only.value = NULL,
newCol = "black",
restore.edges = FALSE,
refObj = "rawgraph.40k"
)
x |
a valid gGraph object. |
mode |
a character string indicating whether selected nodes are clicked one by one ('points') or by defining a rectangular area ('area'). |
attr.name |
the name of the node attribute to be modified. |
attr.value |
the new value of attribute assigned to selected nodes. |
only.name |
(optional) in area mode, the name of a node attribute to add an extra selection criterion. See details. |
only.value |
(optional) in area mode, and if |
newCol |
a character string giving the new color for the attribute value. |
restore.edges |
a logical indicating whether edges stemming from the
modified nodes should be re-added to the graph, using |
refObj |
a character string or a gGraph object, used as reference when re-adding edges. If a character string is provided, it must match one of the following dataset: 'rawgraph.10k', 'rawgraph.40k'. |
The argument only.name
allows one to perform a more accurate
selection of nodes whose attribute is changed, by specifying values
(only.value
) of an attribute (only.name
) that can be selected.
For instance, one may want to define new attributes for nodes of
worldgraph.10k that are exclusively on land: this would be done by
specifying only.name="habitat"
and only.value="land"
.
A gGraph object with modified node attributes.
## Not run:
plot(worldgraph.10k, reset = TRUE)
## have to click here for an area
## all nodes are modified in the area
x <- geo.change.attr(worldgraph.10k, mode = "area", attr.name = "habitat", attr.value = "fancy
habitat", newCol = "pink") # modify selected area
plot(x, reset = TRUE) # modification in the whole selected area
## have to click here for an area
## only nodes on land are modified
x <- geo.change.attr(x, mode = "area", attr.name = "habitat", attr.value = "fancy2
habitat", newCol = "purple", only.name = "habitat", only.value = "land")
plot(x, reset = TRUE) # modification in the whole selected area
## End(Not run)
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