Subsets columns in a [taxmap()] object. Takes and returns a [taxmap()] object. Any variable name that appears in [all_names()] can be used as if it was a vector on its own. See [dplyr::select()] for the inspiration for this function and more information. Calling the function using the `obj$select_obs(...)` style edits "obj" in place, unlike most R functions. However, calling the function using the `select_obs(obj, ...)` imitates R's traditional copy-on-modify semantics, so "obj" would not be changed; instead a changed version would be returned, like most R functions.
obj$select_obs(data, ...)
select_obs(obj, data, ...)An object of type [taxmap()]
An object of type [taxmap()]
Dataset names, indexes, or a logical vector that indicates which tables in `obj$data` to subset columns in. Multiple tables can be subset at once.
One or more column names to return in the new object. Each can be one of two things:
The name of a column in the dataset typed as if it was a variable on its own.
Indexes of columns in the dataset
To match column names with a character vector, use `matches("my_col_name")`. To match a logical vector, convert it to a column index using `which`.
DEPRECIATED. use "data" instead.
Other taxmap manipulation functions:
arrange_obs(),
arrange_taxa(),
filter_obs(),
filter_taxa(),
mutate_obs(),
sample_frac_obs(),
sample_frac_taxa(),
sample_n_obs(),
sample_n_taxa(),
transmute_obs()
# Selecting a column by name
select_obs(ex_taxmap, "info", dangerous)
# Selecting a column by index
select_obs(ex_taxmap, "info", 3)
# Selecting a column by regular expressions
select_obs(ex_taxmap, "info", matches("^n"))
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