wp34s Adding decimals to fractions « Next Oldest | Next Newest »

 ▼ Norman Dziedzic Member Posts: 203 Threads: 29 Joined: Nov 2009 05-02-2011, 10:00 AM On the 32sii and 35s I can be in fraction mode and type something like 0.125 + Which will add 1/8 to the number in X. On the wp34s the same keystrokes don't add anything. Entering an integer works but it seems that as soon as I type the first decimal separator, it wants to see the second one as well. ▼ Walter B Posting Freak Posts: 4,587 Threads: 105 Joined: Jul 2005 05-02-2011, 11:00 AM Hi Norman, Thanks, you found another bug! Walter Paul Dale Posting Freak Posts: 3,229 Threads: 42 Joined: Jul 2006 05-02-2011, 05:43 PM You are in fraction mode. 0.125 is 0 / 125 which is plain zero. What would you expect if you added 1.125 ? Or 1.1.125 ? Where does fraction mode end and real mode being is the question here. - Pauli ▼ Gene Wright Posting Freak Posts: 1,545 Threads: 168 Joined: Jul 2005 05-02-2011, 06:17 PM Hey Pauli. I think the assumption is that the 32sII paradigm for fractions is "the way things should work". ▼ Paul Dale Posting Freak Posts: 3,229 Threads: 42 Joined: Jul 2006 05-02-2011, 07:15 PM Even if it is inconsistent? I don't have a 32sII to hand so I can't experiment at the moment. However if 1.2 is a half, 0.2 should be 0 IMHO. The problem might be that we're not changing the display during entry in fraction mode so it isn't clear enough what is happening. - Pauli Norman Dziedzic Member Posts: 203 Threads: 29 Joined: Nov 2009 05-02-2011, 07:21 PM Quote: You are in fraction mode. 0.125 is 0 / 125 which is plain zero. What would you expect if you added 1.125 ? Or 1.1.125 ? Where does fraction mode end and real mode being is the question here. - Pauli Gene is right. I was going by the 32sii standard. To enter 0/125 on the 32sii you would enter . 0 . 125 The operative part of enter a fraction is that decimal occurs twice in the entry. With only a single . the entry is considered a decimal entry. The 32sii gives the example of entering 5/8 as either . 5 . 8 OR 5 . . 8 Edited: 2 May 2011, 8:15 p.m. after one or more responses were posted ▼ Paul Dale Posting Freak Posts: 3,229 Threads: 42 Joined: Jul 2006 05-02-2011, 08:14 PM I understand the difference now. Shows how often I use fraction mode on the 32sII :-) - Pauli Walter B Posting Freak Posts: 4,587 Threads: 105 Joined: Jul 2005 05-02-2011, 11:47 PM Quote: With only a single . the entry is considered a decimal entry. The 32sii gives the example of entering 5/8 as either . 5 . 8 OR 5 . . 8 That's inconsistent. By plain and simple logic, 5/8 shall be entered as .5.8 - 5..8 enters 5 0/8 ! ▼ Norman Dziedzic Member Posts: 203 Threads: 29 Joined: Nov 2009 05-03-2011, 12:56 AM Quote: That's inconsistent. By plain and simple logic, 5/8 shall be entered as .5.8 - 5..8 enters 5 0/8 ! For better or worse, it is consistent with the 32sII manual ;-) Perhaps the developers of the 32sII realized that there is virtually no need to ever key in a fraction with numerator of 0. HOWEVER, this input method which I'm choosing to call a short cut does not work on the 35s. (Yes I know it is technically not a short cut since it is the same number of keystrokes as . 5 . 8 but it is easier to key in because of the repeated .). Working on a my 32sII with FDISP on. ```Keypress Display -------- ------- 5 5_ . 5._ . 5/_ 8 5/8_ 0 5/8 ``` I guess the major question is whether or not the 32SII should be followed exactly or not. If you want to duplicate the 32SII then I highly recommend reading chapter 5 of the 32SII manual which is on the Museum DVDs. ▼ Walter B Posting Freak Posts: 4,587 Threads: 105 Joined: Jul 2005 05-03-2011, 04:48 AM We don't follow the 32SII exactly - you will never see anything like 0 5/8 on the wp34s I hope ;-) When PROFRC is set, the logic behind our input is: ```.5.8 ENTER results in 5/8 .58 ENTER shall result in 29/50 5.8 ENTER shall result in 5 4/5 5.8.9 ENTER results in 5 8/9 5.9.8 ENTER results in 6 1/8 5..8 ENTER results in 5 0/1 ``` with the 0/1 indicating you're in fraction mode. One may discuss whether the 0/1 is necessary or should be discarded, since the missing decimal mark may be sufficient evidence. Walter ▼ Marcus von Cube, Germany Posting Freak Posts: 3,283 Threads: 104 Joined: Jul 2005 05-03-2011, 10:43 AM The decimal mark is missing in most cases, so we need some indication. Walter B Posting Freak Posts: 4,587 Threads: 105 Joined: Jul 2005 05-06-2011, 02:25 AM Hi Norman, all, FYI, the latest build (820) handles all such inputs and operations properly, as far as I checked. Enjoy - and continue testing :-) ! Walter

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