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equation writer / equation solver

equation writer / equation solver

2008-08-06 by paulmennen

With the HP 50G when I go into the numerical solver, I see the last
equation I entered. Then I hit "Edit" to modify it and it allows me to
edit it in character form at the bottom of the solve window.
However I find this edit method cumbersome compared to the equation
writer. Wouldn't it be nicer if the equation appeared in the equation
writer when this button was pressed? I'm not sure why one would want
to use the character editor when it is so much easier to visualize in
the equation writer.
Is there any way to use the equation writer for this kind of thing? I
found that I could enter the equation in the equation writer and give
it a name. Then in the solver I can press "CHOOS" and select the
equation. However I haven't figured out how to later modify this
equation using the equation writer. Anyway, for such a wonderful built
in tool as the equation writer, it sure seems like they went pretty
far out of their way to talk you out of using it.

Thanks for any suggestions you may have.
~Paul

Re: [50g] equation writer / equation solver

2008-08-06 by Don Hart

Try this while you're in the numerical solver & the equation line highlighted...
Press NXT
Press CALC in the menu line
Press the down arrow

If you're not in the numerical solver you can edit the variable called 'EQ' directly.


--- On Tue, 8/5/08, paulmennen <paul@...> wrote:

> From: paulmennen <paul@...>
> Subject: [50g] equation writer / equation solver
> To: 50g@yahoogroups.com
> Date: Tuesday, August 5, 2008, 9:39 PM
> With the HP 50G when I go into the numerical solver, I see
> the last
> equation I entered. Then I hit "Edit" to modify
> it and it allows me to
> edit it in character form at the bottom of the solve
> window.
> However I find this edit method cumbersome compared to the
> equation
> writer. Wouldn't it be nicer if the equation appeared
> in the equation
> writer when this button was pressed? I'm not sure why
> one would want
> to use the character editor when it is so much easier to
> visualize in
> the equation writer.
> Is there any way to use the equation writer for this kind
> of thing? I
> found that I could enter the equation in the equation
> writer and give
> it a name. Then in the solver I can press "CHOOS"
> and select the
> equation. However I haven't figured out how to later
> modify this
> equation using the equation writer. Anyway, for such a
> wonderful built
> in tool as the equation writer, it sure seems like they
> went pretty
> far out of their way to talk you out of using it.
>
> Thanks for any suggestions you may have.
> ~Paul
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>

Re: [50g] equation writer / equation solver

2008-08-06 by Guy Teague

just thought i'd say that on the ti cas nspire, you can't go back and edit a history object. you have to copy it and then paste it to the 'active' line. feels very awkward to me after the more 'logical' behavior of the hp50.

/guy

On Wed, Aug 6, 2008 at 1:44 AM, Don Hart <ddhart1@...> wrote:
Try this while you're in the numerical solver & the equation line highlighted...
Press NXT
Press CALC in the menu line
Press the down arrow

If you're not in the numerical solver you can edit the variable called 'EQ' directly.


--- On Tue, 8/5/08, paulmennen <paul@...> wrote:

> From: paulmennen <paul@...>
> Subject: [50g] equation writer / equation solver
> To: 50g@yahoogroups.com
> Date: Tuesday, August 5, 2008, 9:39 PM
> With the HP 50G when I go into the numerical solver, I see
> the last
> equation I entered. Then I hit "Edit" to modify
> it and it allows me to
> edit it in character form at the bottom of the solve
> window.
> However I find this edit method cumbersome compared to the
> equation
> writer. Wouldn't it be nicer if the equation appeared
> in the equation
> writer when this button was pressed? I'm not sure why
> one would want
> to use the character editor when it is so much easier to
> visualize in
> the equation writer.
> Is there any way to use the equation writer for this kind
> of thing? I
> found that I could enter the equation in the equation
> writer and give
> it a name. Then in the solver I can press "CHOOS"
> and select the
> equation. However I haven't figured out how to later
> modify this
> equation using the equation writer. Anyway, for such a
> wonderful built
> in tool as the equation writer, it sure seems like they
> went pretty
> far out of their way to talk you out of using it.
>
> Thanks for any suggestions you may have.
> ~Paul
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>



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Re: equation writer / equation solver

2008-08-06 by paulmennen

--- In 50g@yahoogroups.com, Don Hart <ddhart1@...> wrote:
>
> Try this while you're in the numerical solver & the equation line
highlighted...
> Press NXT
> Press CALC in the menu line
> Press the down arrow

Hi Don. Wow, that is slick. Many thanks!
How do you guys figure out stuff like that?
I don't think I saw anything like that in the tutorials.

~Paul

Re: equation writer / equation solver

2008-08-06 by arthurford4142

--- In 50g@yahoogroups.com, "Guy Teague" <accts@...> wrote:
>
> just thought i'd say that on the ti cas nspire, you can't go back
and edit a
> history object. you have to copy it and then paste it to the
'active' line.
> feels very awkward to me after the more 'logical' behavior of the hp50.
>
> /guy

In this instance, there's no need to Copy/Paste. The Nspire works just
like the 89 here: scroll up in history until your desired expression
is highlighted, then hit Enter. The expression is copied to the entry
line, and edit away.

Upgraded to Nspire CAS 1.4. TI nailed the upgrade process. No longer
have to search through the house for a paper clip; no longer have to
worry about fat fingering simultaneous buttons; don't even have to
download the upgrade file (but I already had, and it gives you a choice).

Re: [50g] Re: equation writer / equation solver

2008-08-06 by Guy Teague

i just got back to the nspire and checked and you're absolutely right--the nspire does copy the object to a new line it if you hit enter, you just can't edit the original object in place.

i don't know what mode i was in that i thought that didn't work, i swear i thought i checked that thoroughly. very sorry for the mistake.

/guy

On Wed, Aug 6, 2008 at 9:26 AM, arthurford4142 <arthurford4142@...> wrote:
--- In 50g@yahoogroups.com, "Guy Teague" <accts@...> wrote:
>
> just thought i'd say that on the ti cas nspire, you can't go back
and edit a
> history object. you have to copy it and then paste it to the
'active' line.
> feels very awkward to me after the more 'logical' behavior of the hp50.
>
> /guy

In this instance, there's no need to Copy/Paste. The Nspire works just
like the 89 here: scroll up in history until your desired expression
is highlighted, then hit Enter. The expression is copied to the entry
line, and edit away.

Upgraded to Nspire CAS 1.4. TI nailed the upgrade process. No longer
have to search through the house for a paper clip; no longer have to
worry about fat fingering simultaneous buttons; don't even have to
download the upgrade file (but I already had, and it gives you a choice).


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