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HP PRIME : How to delete a variable ?
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mustapha DAOUDI
Feb 11, 2017, 12:35:35 PM2/11/17
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I would like to delete a variable created by the user on HP prime , but the command "Purge" is only effective in CAS mode .
Is there any command that can do this ,from a program , or manually from the home screen ?
Thank you.
Finally , the saturn familly, real or emulated are the best .
Is there any command that can do this ,from a program , or manually from the home screen ?
Thank you.
Finally , the saturn familly, real or emulated are the best .
Joe Horn
Feb 12, 2017, 9:58:20 AM2/12/17
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On Saturday, February 11, 2017 at 12:35:35 PM UTC-5, mustapha DAOUDI wrote:
> I would like to delete a variable created by the user on HP prime , but the command "Purge" is only effective in CAS mode .
> Is there any command that can do this ,from a program , or manually from the home screen ?
In Home, use DelHVars(n) or DelHVars("name") to delete the specified Home user variable.
> I would like to delete a variable created by the user on HP prime , but the command "Purge" is only effective in CAS mode .
> Is there any command that can do this ,from a program , or manually from the home screen ?
An easier method, however, is to press Mem (Shift Toolbox), highlight User Variables, and press backspace to clear all your Home user-created variables. OR you can enter the User Variables catalog, press up-arrow to jump to the bottom of the list where your own user-created variables are, and delete them selectively by highlighting them one at a time and pressing backspace.
Alternative method: In Home view, press Vars, make sure the User tab is selected, select User Variables, and backspace the variables you wish to purge.
Hope that helps!
-Joe-
mustapha DAOUDI
Feb 12, 2017, 10:03:32 AM2/12/17
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Hello Joe !
Thank you very much, i was looking for the command, and you showed it to me. I will try it in a progrem.
Many thanks .
Thank you very much, i was looking for the command, and you showed it to me. I will try it in a progrem.
Many thanks .
mustapha DAOUDI
Feb 12, 2017, 10:03:33 AM2/12/17
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gbe...@gmail.com
Mar 4, 2018, 2:18:40 PM3/4/18
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On Saturday, February 11, 2017 at 12:35:35 PM UTC-5, mustapha DAOUDI wrote:
Joe Horn
Mar 4, 2018, 9:30:49 PM3/4/18
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The single-letter variables (including theta) are permanently built-in variables
which cannot be deleted. You can "clear" A (for example) two different ways:
(1) A:=0
(2) Mem, User Variables, highlight A, press the backspace or Del key,
or tap the Reset softkey.
I don't think that there is a way to set A-Z equal to zero all at once without also purging all user-created variables.
However, please know that there is no real need to "clear" the single-letter variables, since doing so doesn't free up any memory (they always exist, containing a real number, no matter what). Just set each one as needed. Think of them as shelves; it's ok to have random stuff on shelves even when you're not using that stuff. Well-written programs always initialize the variables that will be used anyway.
-Joe-
which cannot be deleted. You can "clear" A (for example) two different ways:
(1) A:=0
(2) Mem, User Variables, highlight A, press the backspace or Del key,
or tap the Reset softkey.
I don't think that there is a way to set A-Z equal to zero all at once without also purging all user-created variables.
However, please know that there is no real need to "clear" the single-letter variables, since doing so doesn't free up any memory (they always exist, containing a real number, no matter what). Just set each one as needed. Think of them as shelves; it's ok to have random stuff on shelves even when you're not using that stuff. Well-written programs always initialize the variables that will be used anyway.
-Joe-
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