Re: HP-50G Equation Editing Logic Message #4 Posted by Gilles Carpentier on 20 Apr 2012, 7:52 p.m., in response to message #1 by Matt Agajanian
"Yes, yes, since the MacOS/Windows GUI tactic is that typing over a selected/highlighted block of text replaces, why wouldn't the 50G's equation editing follow that philosophy?"
In fact, that is what the calc do ... if you enter number or variable.But if you enter a function, the function apply to the selected part of the equation. (the same way you can choose italic or bold in a GUI) Ex :
12 + 25 -> 3 give 3
12 + 25 -> SIN give SIN(12+25)
12 + 25 -> * 3 give (12+25).3
12 + 25 -> SHIFT CLEAR delete the selection
For the example of the book I do :
5 / 5 + 2 () 5 + PI y^x 2 -> / 2 Rshift&Up + 1 / 3
Note that * is not necessery before ()
It's not obvious to explain the logic but it's very 'natural' with some experience... In fact i think that the best way is to try ;)
For example :
- you can useLShift&Left to exchange 2 parts of a selected part of equation
- You can use UNDO wich is sometime very practical
- You can edit )a part of an equation ( very practicle for removing a square root or trig function for example
If the example of the english book is the same as the french one, note there is a much simplier way to drop the '1/3' in the equation with the square root :
RShift&Up Down Right <= (<= for the delete key)
Edited: 20 Apr 2012, 9:18 p.m.
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