ode><a href="https://rdrr.io/r/base/c.html" class="external-link">c()</a></code>, a vector of column indices, or a helper function focused on selections. The select helper functions are: <code><a href="https://tidyselect.r-lib.org/reference/starts_with.html" class="external-link">starts_with()</a></code>, <code><a href="https://tidyselect.r-lib.org/reference/starts_with.html" class="external-link">ends_with()</a></code>, <code><a href="https://tidyselect.r-lib.org/reference/starts_with.html" class="external