futher edits

vignettes/data.Rmd

@@ -1,8 +1,8 @@
 ---
-title: "A guide to model input and output data"
+title: "A guide to biokinetics input and output data"
 output: rmarkdown::html_vignette
 vignette: >
-    %\VignetteIndexEntry{A guide to model input and output data}
+    %\VignetteIndexEntry{A guide to biokinetics input and output data}
     %\VignetteEngine{knitr::rmarkdown}
     %\VignetteEncoding{UTF-8}
 ---
@@ -17,7 +17,7 @@ knitr::opts_chunk$set(
 # Input data
 
 The model requires time series data about individual titre readings, along with last exposure times. Times can be relative (e.g. day of study) or absolute (i.e. precise calendar dates).
-The full list of required columns is as follows:
+This is provided via the `data` argument when initialising an object of class [biokinetics](../reference/biokinetics.html), which must be a [data.table](https://rdatatable.gitlab.io/data.table/reference/data.table.html) containing the following columns:
 
 | name         | type                 | description                                                                                | required |
 |--------------|----------------------|--------------------------------------------------------------------------------------------| -------- |
@@ -52,7 +52,7 @@ that users who are already familiar with `cmdstanr` are free to do what they wan
 directly with the fitted `CmdStanMCMC` all values will be on this scale. The package provides a helper function for converting
 back to the original scale: [convert_log2_scale_inverse](../reference/convert_log2_scale_inverse.html).**
 
-Three further functions provide model outputs that we think are particularly useful in [data.table](https://cran.r-project.org/web/packages/data.table/) format.
+Three further functions provide model outputs that we think are particularly useful in [data.table](https://rdatatable.gitlab.io/data.table/reference/data.table.html) format.
 [biokinetics](../reference/biokinetics.html) contains documentation on each of these functions so please read that first; this vignette provides
 guidance on the correct interpretation of each column in the returned tables (in these functions data is returned on the original scale).