App specification

[michbur]

1. Input: single xlsx or csv file.
2. Tab: input data
3. Selection of the numeric-only columns.
4. Prepare 20 methods named methodX where X is a numeric constant. Each method imputes missing data by filling it with its constant. Eg., method11 fills every missing value with 11.
5. Provide a selection tab for selecting of the methods. Prepare also button "select all", "deselect all"
6. Prepare an output where each imputation method has its tab (or maybe if only less than 5 methods are chosen).
7. Prepare download buttons: download csv (all imputations in separate csv, file in a zip format) or xlsx where each sheet represents a different missing value imputation method.