This function provides a method for creating a multi-dataset tracking report
trackingReport( dataset_list, vars, labels = NULL, weight = NULL, show_once = NULL )
A list of two or more crunch datasets. Datasets should be provided in time order. From oldest to youngest. (i.e, wave 1, wave 2, ..., wave n)
A character vector of question aliases to be included in the report this may include aliases that are available in at least one of the datasets specified in dataset_list
The labels for each wave. Should be of a length that matches the number of datasets.
NULL to accept each dataset's current weight or a single alias that is available in all datasets as a string. Multiple weights is not recommended in a tracking report.
A vector of aliases whose values may be available in one or more datasets will only be shown for the latest data set in `dataset_list`.