HP Prime - definitely no education tool bluesun08 Unregistered Posts: 207 Threads: 48 Joined: Feb 2010 11-16-2013, 09:00 PM Two main reasons: 1. The uppercase/lowercase mixing of variables and function names between the CAS and Home screens is incredibly confusing. I've no idea how I could explain it to beginning students in a way which made it seem natural. 2. I can't find an easy way to graph a function and its derivative. I can create a function in the CAS screen: x*(x^2-1) -> f(x) and compute its derivative diff(f(x),x) -> g(x) and then graph them with F1(X) = f('X') and F2(x) = g('X') Why can't I just use F2(x) = diff(F1(x),x)? Han Unregistered Posts: 709 Threads: 104 Joined: Nov 2005 11-16-2013, 10:02 PM Quote: Two main reasons: 1. The uppercase/lowercase mixing of variables and function names between the CAS and Home screens is incredibly confusing. I've no idea how I could explain it to beginning students in a way which made it seem natural. 2. I can't find an easy way to graph a function and its derivative. I can create a function in the CAS screen: x*(x^2-1) -> f(x) and compute its derivative diff(f(x),x) -> g(x) and then graph them with F1(X) = f('X') and F2(x) = g('X') Why can't I just use F2(x) = diff(F1(x),x)? 1. This issue is just a matter of time. For me, it was very annoying at first. After getting used to it, it was hardly noticeable. Part of the reason for it, though, is to avoid conflicts with persistent global variables A-Z with symbolic manipulation (which generally substitutes a variable with its value if it is defined). So lower-case variables are generally undefined (unless the user defines them) which makes for much easier symbolic manipulation without having to use "restart" or "purge". 2. The lack of good documentation (although xcas has some decent documentation in French and English) made specifically for the HP Prime is where most of the blame should lie. ```f(x):=x*(x^2-1); F1:=f; F2:=F1'; ``` That's all you need to do before you hit the [Plot] button. Cheers, Han Helge Gabert Unregistered Posts: 113 Threads: 20 Joined: Sep 2013 11-16-2013, 10:43 PM Re: 2) My calc crashes. It is warm start time. Did you actually try that? bluesun08 Unregistered Posts: 207 Threads: 48 Joined: Feb 2010 11-16-2013, 10:54 PM 1. Maths is complicated enough for students. The calculator should be an education tool and not a tool for freaks. 2. The imput of your example is tricky (avoiding the uppercase/lowercase-problem) but cumbersome (defining a function f, defining a function F1, defining a function F2). 3. In CAS you have to hit Shift-Alpha for upper key, which is lower key in Home-View (very very confusing). 4. Before plotting I have to activate the F2 function in Function App. 5. After pressing the plot key, my calculator crashed and reboot. Edited: 16 Nov 2013, 10:56 p.m. Mark Hardman Unregistered Posts: 208 Threads: 16 Joined: Jul 2005 11-16-2013, 10:57 PM Teacher: "Freak". Me: "Present". Alberto Candel Unregistered Posts: 72 Threads: 16 Joined: Sep 2013 11-17-2013, 11:35 AM Hi, From an educational point of view, it would be great to be able to plot a function f together with it's Taylor and Pade approximates with something like this ```F1(X):=ln(1+x) F2(x):=taylor(F1(x),x=0,5) F3(x):=pade(F1(x),x,6,3) ``` but I cannot make it work. « Next Oldest | Next Newest »

 Possibly Related Threads… Thread Author Replies Views Last Post "HexZombie - a tool for real programmers" Thomas Chrapkiewicz 8 2,888 11-16-2013, 12:46 AM Last Post: Kiyoshi Akima HP 41: new barcode creation tool MichaelG 50 11,945 07-17-2013, 02:09 AM Last Post: Ángel Martin wp34s library tool Andrew Nikitin 3 1,424 07-11-2013, 03:45 AM Last Post: Marcus von Cube, Germany RPN in primary education Chris Smith 26 5,887 03-28-2013, 08:46 AM Last Post: bhtooefr HP-9100 used in computer-based education (video) Juergen Keller 5 2,012 12-07-2012, 11:04 AM Last Post: hpnut [WP34S] Mac OS Flashing Tool Won't Flash Les Wright 2 1,409 03-23-2012, 03:59 AM Last Post: pascal_meheut 32-bit MCODE tool chain for the HP41 incl. D41 now MichaelG 4 1,998 02-12-2012, 08:57 PM Last Post: Kerem Kapkin (Silicon Valley, CA) Modified Flash Tool for WP 34S Marcus von Cube, Germany 5 1,925 10-04-2011, 12:17 PM Last Post: Marcus von Cube, Germany HP15c as a financial tool - ended! Jose Gonzalez Divasson 1 1,022 05-29-2011, 04:00 PM Last Post: Jose Gonzalez Divasson HP-01 Back Cover Tool aj04062 8 2,367 04-05-2011, 02:13 AM Last Post: Geoff Quickfall

Forum Jump: