Miscellaneous Bugs and Problems - Printable Version +- HP Forums ( https://www.hpmuseum.org/forum)+-- Forum: HP Calculators (and very old HP Computers) ( /forum-3.html)+--- Forum: HP Prime ( /forum-5.html)+--- Thread: Miscellaneous Bugs and Problems ( /thread-7304.html) |

Miscellaneous Bugs and Problems - CH3791 - 11-25-2016 05:10 AM
1a. Plotting the derivative of a function in the function app. [attachment=4193] 1b. Plotting a graph with a domain. [attachment=4196] For these two cases, most of the functions would not work correctly. The ones with problems I have found include: 6 Slope, 7 Signed Area, 8 Extremum, 9 Tangent [attachment=4194][attachment=4197] 2. The Define menu. In order to make a user variable, one must use the Define Menu (shift + xtθn). The Name must be lower case and Function must be upper case. However, when you tap alpha when typing a function, it is not automatically in CAPS mode and the letters come out as lower case. This is kind of annoying as other places eg. HOME and CAS have the cases optimised correctly. [attachment=4195] 3. Prime messing too much with inputs. Whenever you click on items that sit on the command line, the Prime automatically adds in a whole lot of stuff such as extra brackets and spaces. These cosmetic changes are annoying and it would still be great to have a setting to turn this off. However, sometimes during this alteration process, the input actually turns incorrect. Two examples are listed below. diff((x-4)*(x+9)) will become (x-4)*(x+9)' with only the second bracket is being differentiated. x^-1 will become x(^-1) The ^-1 has been converted into one unit, and it is impossible to edit the exponent itself anymore. RE: Miscellaneous Bugs and Problems - DrD - 11-25-2016 10:49 AM
Which software version are you using? RE: Miscellaneous Bugs and Problems - CH3791 - 11-25-2016 11:01 AM
Version 10637, so should be the latest one? RE: Miscellaneous Bugs and Problems - CH3791 - 11-25-2016 11:11 AM
Ok it seems that for graphing with a domain, using a piecewise defined function solves the problems with 6 Slope, 7 Signed Area, 8 Extremum and 9 Tangent functions. RE: Miscellaneous Bugs and Problems - jte - 11-25-2016 10:46 PM
(11-25-2016 05:10 AM)CH3791 Wrote: 1a. Plotting the derivative of a function in the function app. The Slope, Extremum, and Tangent features of the Function Plot view ask lower levels of the system to differentiate the function of interest. There are a variety of conversion issues involved. If you go to the CAS screen and try entering diff(F2(X),X) with F1 and F2 defined as you've suggested (F1(X)= X^3+3*X^2 and F2(X)= ∂(F1(X),X=X)), you'll see this (conversion) issue at a command-line level. Similarly, an evaluation of ∫(F2(X),X,0,1) in the CAS screen will show this type of conversion issue at a command-line level for integration (which the Signed Area feature of the Function app relies on). RE: Miscellaneous Bugs and Problems - jte - 11-25-2016 10:52 PM
(11-25-2016 11:11 AM)CH3791 Wrote: Ok it seems that for graphing with a domain, using a piecewise defined function solves the problems with 6 Slope, 7 Signed Area, 8 Extremum and 9 Tangent functions. Yes, compare how differentiation (and integration) of F1(X) behaves in the CAS screen for F1(X)= X^2/(X>=-3 AND X<=3) vs F1(X)= PIECEWISE(X>=-3 AND X<=3,X^2). |