gt_pull: Extract a single column from a geometric object
In geometr: Generate and Modify Interoperable Geometric Shapes

Description Usage Arguments Details Value See Also Examples

This function allows to extract a specific column from any geometric object for which all required getters are available and thus reflects the base function $.

1	gt_pull(obj, var, ungroup = FALSE)

`obj`	[`geometric object(1)`] the object to pull a column from.
`var`	[`character(1)`] name of the variable to pull.
`ungroup`	[`logical(1)`] inversely to the argument `group` in `gc_geom`, this argument provides the attribute to pull per each individual feature, producing duplicates in case there is more than one feature per group.

This function searches for var by first looking in the groups, then the features and finally the points of obj. This results always in an output that is limited to the unique cases of var. In case you want the explicit values of, for instance, fid in obj@points, you have to extract points and then use pull on the result.

vector of the column specified in var.

Other geometry tools: gt_filter(), gt_locate(), gt_reflect(), gt_rotate(), gt_scale(), gt_skew(), gt_stretch(), gt_translate()

# pull values from a geom (there are two features, thus two values) ...
gt_pull(gtGeoms$point, "fid")

# pull from a Raster* with RAT
gt_pull(gtGeoms$grid$categorical, "cover")

# pull from an sf-object
gt_pull(gtSF$point, "a")