# print model output
tar_load(model)
summary(model)4 Output files
The results and figures of an analysis are usually presented in a report or presentation or both. One or more output files, such as a quarto document and presentations can be added to a targets pipeline.
Each target from the pipeline can be loaded and used in the quarto document. The targets that are used in the quarto document need to be loaded into the current environment. For this we can use tar_load() or tar_read(). The first function is used when a target is used several times. tar_read() is useful if a target is only needed once, e.g. to show a figure.
All R packages that are needed to run the quarto file need to be loaded in the .qmd file. If you are using a R package exclusively in the quarto script, the package can be loaded only in the quarto file, and does not need to be added to the _target.R file. targets always need to be loaded in both files.
The tarchetypes packages has to be loaded in the _target.R file. It has a number of useful helper functions including tar_quarto() which is needed to render quarto files in the targets pipeline.
Exercise
Open the target_quarto.qmd file.
Load and print the trait figure using tar_read() in the third code chunk (fig-trait-figure).
To add the quarto document to the pipeline, the manuscript has to be rendered. This is done in the _targets.R file in the list of targets using tar_quarto().
# render ms
tar_quarto(name = manuscript, path = "target_quarto.qmd")
Exercise
Add the quarto file to the pipeline
Check that you have loaded the tarchetypes package in the _target.R file.
Add tar_quarto() in the _targets.R file to render the quarto file.
Run tar_make() to run the whole pipeline.
Voilà, you have run your first targets pipeline including a quarto file. Have some 🍰!
Exercise
Display figure Display the figure produced in the targets pipeline in the output file using tar_read(). There is a code chunk prepared to add this code.
Run tar_make() to run the whole pipeline.