pooled_harmonized_dataset_create() could have the possibility to add a variable for the dataset of origin

[a-trottier]

Involve adding an extra variable in the dataset and in the data_dictionary Coherent with the template and could help the user Low priority

[GuiFabre]

done

The functions affected and to be tested are :

• [x] as_harmonized_dossier()
• [x] harmo_process()
• [x] harmonized_dossier_evaluate()
• [x] harmonized_dossier_summarize()
• [x] harmonized_dossier_visualize()

[GuiFabre]

related to https://github.com/maelstrom-research/Rmonize/issues/41 https://github.com/maelstrom-research/Rmonize/issues/42 https://github.com/maelstrom-research/Rmonize/issues/43