solve() problems

[jte]

(06-06-2021 08:42 AM)HansB Wrote:  ... Another quibble I got with the Function app is this: investigating a function in Plot view and tracing it and for instance finding a Root via the soft menu, the tracer is put onto the solution, the solution is given numerically, but if I then jump to another graphed function via up/down cursor keys, the trace cursor is not at precisely the same X anymore, so the F(X) values are not quite comparable. It would be nice if they were!

One workaround with the current UI is to use the Plot-Table view. If, after jumping to a root via Fcn / Root, one presses Up or Down, the X coordinate will not be changed (unlike in the standard Plot view).

When I implemented the Function app for the 39gII, the UI specification for the 39gII's Function app was for it to match the UI of the 39gs's Function app. (The Prime's Function app implementation is derived from the 39gII's; one started where the other left off. I didn't reference any of the source for the 39gs when implementing the Function app for the 39gII, but tried to be quite observant as to the details of the 39gs as I went along... which is why I remember some UI details.) Some of these UI details should undoubtedly be reviewed; I have a suspicion that some aspects of the 39gs's UI were driven by computational efficiency concerns.