tar_load | R Documentation |
Load the return values of targets into the current environment
(or the environment of your choosing). For a typical target, the return
value lives in a file in _targets/objects/
. For dynamic files (i.e.
format = "file"
) the paths loaded in place of the values.
tar_load_everything()
is shorthand for tar_load(everything())
to load all targets.
tar_load(
names,
branches = NULL,
meta = tar_meta(targets_only = TRUE, store = store),
strict = TRUE,
silent = FALSE,
envir = parent.frame(),
store = targets::tar_config_get("store")
)
names |
Names of the targets to load.
You may supply |
branches |
Integer of indices of the branches to load for any targets that are patterns. |
meta |
Data frame of metadata from |
strict |
Logical of length 1, whether to error out
if one of the selected targets is in the metadata
but cannot be loaded.
Set to |
silent |
Logical of length 1. Only relevant when
|
envir |
Environment to put the loaded targets. |
store |
Character of length 1, path to the
|
Nothing.
Several functions like tar_make()
, tar_read()
, tar_load()
,
tar_meta()
, and tar_progress()
read or modify
the local data store of the pipeline.
The local data store is in flux while a pipeline is running,
and depending on how distributed computing or cloud computing is set up,
not all targets can even reach it. So please do not call these
functions from inside a target as part of a running
pipeline. The only exception is literate programming
target factories in the tarchetypes
package such as tar_render()
and tar_quarto()
.
Several functions like tar_make()
, tar_read()
, tar_load()
,
tar_meta()
, and tar_progress()
read or modify
the local data store of the pipeline.
The local data store is in flux while a pipeline is running,
and depending on how distributed computing or cloud computing is set up,
not all targets can even reach it. So please do not call these
functions from inside a target as part of a running
pipeline. The only exception is literate programming
target factories in the tarchetypes
package such as tar_render()
and tar_quarto()
.
Other data:
tar_crew()
,
tar_load_everything()
,
tar_load_raw()
,
tar_objects()
,
tar_pid()
,
tar_process()
,
tar_read_raw()
,
tar_read()
if (identical(Sys.getenv("TAR_EXAMPLES"), "true")) { # for CRAN
tar_dir({ # tar_dir() runs code from a temp dir for CRAN.
tar_script({
list(
tar_target(y1, 1 + 1),
tar_target(y2, 1 + 1),
tar_target(z, y1 + y2)
)
}, ask = FALSE)
tar_make()
ls() # Does not have "y1", "y2", or "z".
tar_load(starts_with("y"))
ls() # Has "y1" and "y2" but not "z".
tar_load(any_of("z"))
ls() # Has "y1", "y2", and "z".
})
}
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