Back-calculating 2x2 Tables

[vlangberg]

If a user has events and totals rather than events and non-events, there is no way to calculate non-events. Likewise, if a user has, for example, an odds ratio and totals, there is no way to back-calculate events.

[gdietz]

@bwallace I guess we should include the calculator functionality like in OpenMeta?

[bwallace]

Might be nice. How hard would it be to transplant that functionality here?

[gdietz]

@bwallace Somewhat hard. I also think we should then transition the main spreadsheet UI from being an arbitrary spreadsheet to having a particular data type associated with it so that different options are shown according to the data type. Additionally, if we do this, we can get rid of the data location page in the wizard since we can have the user tell us what columns their data describe (e.g. when you right click a column you can tell the program 'this is the # of treatment responses, etc.' and have this persist across analyses. We should make a new issue for this. For now, for the purposes of this issue we should just:

• Add a calculator icon in the toolbar.
• When clicked, a non-modal calculator window appears which lets you do calculations but is not integrated with the spreadsheet itself.

[gdietz]

what's left to do:
-Make the back-calculation work
-make the window non-modal