selection helpers that only work in a selection context.
Examples of valid selection contexts are:
Using a selection helper anywhere else results in an error:
starts_with("foo") mtcars[contains("foo")] subset(mtcars, select = matches("foo"))
If you see this error, you've probably used a selection helper in the wrong place, possibly as the result of a typo (e.g. misplaced comma or wrong argument name).
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.