Another 50G (disappointment) story
in [HP48]
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From: laurent.joliaferrier on 28 Sep 2006 02:57 Berk Birand wrote: > * Probably one of the major disappointments was this bug I found in the > equation library. When you go in one of the sections (say, Projectile > Motion), and press the PIC soft-key to look at the supposedly helpful > picture, you can't change the equation anymore! After you press EQN, > pressing the up-and-down keys scroll the screen, instead of moving > through the list of equations. I tested it on my HP 50g. Same 'issue'. In fact the up- and down-keys scroll the screen even if you don't display a PICT before. You should use the NXEQ menu option to move to the next equations.
From: acl on 28 Sep 2006 06:50 Berk Birand wrote: > On Thu, 28 Sep 2006 04:53:45 +0000, Douglas Rohm wrote: > >>>* After using some of the equations in the library, and the finance >>>feature, I noticed that my home directory was swamped with >>>variables! n, >>>p0, Ie0. I found this kind of frustrating, since at first I didn't >>>know >>>you could select multiple files for "purging." It still seems >>>ridiculous >>>to go into the file manager after using each equation and delete a >>>bunch >>>of variables.. >>Hit LS + then click on each variable to enter it into the list. Hit ENTER >>to put the list on the stack. Then LS EVAL, MEM, PURGE. It will purge all >>the vars in the list. You can place PURGE in your CST menu for faster access >>if you want. > > Thanks for the reply, but I couldn't find the location of LS+. But it > seemed like your method of deleting variables is already longer than what > I used to do. I open the file manager, select each variable i want to > delete using ENTER, and then hit PURGE. It prompts me whether I want to > purge the variable, and I press the "ALL" soft-key to do so. > > What seemed unreasonable was the actual act of picking every single > variable that the equation created manually... > > Berk > He means: Left Shift and + (to get the curly brackets indicating a list is being entered), then select the variables (by pressing F1 to F6 and so on); these get entered into the list. Press ENTER, then PURGE. All are deleted. You can also write a short program that allows you to do this in one keypress and assign it to a key or the custom menu, but maybe this will come bit later!
From: TW on 28 Sep 2006 10:26 > Actually this will sound quite funny but I had just downloaded your stat > library! I first tried out Stat49 by Guth, but that didn't have the > distributions that i wanted either. Then I got yours, which seems to work > fine. I couldn't get the interface to work though, as typing NSW didn't do > anything. Maybe it doesn't work with HP50g? More probably I screwed up > somewhere. If I remeber right, that is only for the 39/40 calculators. On the 49/50 you have easy access to the functions throgh the library menu (RS-2, right shift-2) or by typing SMEN. I just never got around to writing a seperate document for the 49/50 version since they were so close. I plan on adding a few things to it sometime when I get some free time since I am in another statistics class. TW
From: markb on 28 Sep 2006 11:18 Berk Birand wrote: > Thanks for the reply, but I couldn't find the location of LS+. But it > seemed like your method of deleting variables is already longer than what > I used to do. I open the file manager, select each variable i want to > delete using ENTER, and then hit PURGE. It prompts me whether I want to > purge the variable, and I press the "ALL" soft-key to do so. > > What seemed unreasonable was the actual act of picking every single > variable that the equation created manually... A long time ago, I wrote a utility app to help with this. I use this in virtually every subdirectory on my calc. This program takes as input a list of variables you wish to *keep* and deletes all the others in the current directory. I'm not familiar with the special characters needed for write out User RPL progs, but hopefully it will be clear. '<<' and '>>' are the program delimeters, and -> is the arrow (right-shift 0). << -> SAVELIST << VARS OBJ-> 1 SWAP START SAVELIST OVER POS << DROP >> << PURGE >> IFTE NEXT >> >> Save this prog as '->CLV' in the home directory so that it can be accessed from all subdirectories. To use it, let's assume you are in a subdirectory containing the variables A and B like you'd like keep, but you want to delete all others in the subdirectory. To use this prog, create a variable named 'CLV' in your current directory that contains the following prog: << { CLV A B } ->CLV >> When you press the softkey for CLV, all variables in the current subdirectory that aren't in the list (CLV, A, and B in this case) will be purged. It will, however, quit if it encounters a non-empty directory. Perhaps someone in the group could improve it. You can copy the 'CLV' prog to any other subdirectory, but REMEMBER TO CHANGE THE LIST OF VARIABLES TO SAVE. If you forget to do this, you probably won't be happy the result. Hope this will be helpful to someone ...
From: John H Meyers on 28 Sep 2006 17:31
On Wed, 27 Sep 2006 22:22:03 -0500, Berk Birand: Do 'TEMP' CRDIR Press VAR then TEMP menu key. Now you're in the just-created TEMP directory (which is empty). Solving equations numerically will now save the answers here (some people actually *want* their answers saved :) rather than automatically discarding answers -- you can even come back tomorrow and continue where you left off. Any time you want to sweep this directory clean, type CLVAR -- there, it's empty again! No one remembers that even tying their shoes for the first time took some experimenting to find out how; undoubtedly the same is true for anyone just switching from HP to a TI. [r->] [OFF] |