Possible BUG on History CAS - 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: Possible BUG on History CAS (/thread-7524.html) Possible BUG on History CAS - compsystems - 01-06-2017 08:21 PM Hello Quoted expressions ('expression') are not working well in CAS history F1(x):='sin(x)'; ⇨ 'sin(x)' [up key] QUOTE(sin(X)) f2(x):=quote(sin(x)); [up key] f1:=(x)->'sin(x)' f(x):=x^2; f(x)' ⇨ 2*x // ok f' ⇨ (x)->2*x a/b; ⇨ a/b // ok quote(a/b); ⇨ a/b (problem, not include quotation marks) ⇨ [up key][up key]copy '(a/b') error ? It's a BUG or not? Is expected ⇨ quote(a/b) or 'a/b' or '(a/b)' numer(quote((a/b))) ⇨ a/b numer(eval(quote((a/b)))) ⇨ a // ok [up][up]copy error ? He does not let me retrieve the input One of the functions of the history is to be able to call inputs and outputs and then manipulate them. Who agrees with this? RE: Possible BUG on History CAS - compsystems - 01-06-2017 09:11 PM quote(a/b); ⇨ a/b [up key][up key]copy ⇨ '( a/b' ) I think the problem is that the last expression is interpreted as a derivative diff(b), -> diff( a/diff(b) ) The problem could be solved (copy input) if the expression has two ' at the beginning and end, are not derived is a single expression. RE: Possible BUG on History CAS - Han - 01-08-2017 03:48 AM It is a bug (though only in Texbook entry mode) RE: Possible BUG on History CAS - compsystems - 01-08-2017 04:23 PM Some plans by HP-TEAM to correct this BUG?