Question about Casio fx-115MS

[Jack Crane]

What does the Rnd key (SHIFT 0) (in the lower-left corner) on the Casio fx-
115MS calculator do, and how is it used?

And is there anywhere on the web a better manual than the one that comes
with the product? Or a tutorial?

Thanks,

Jack

 

[Jonathan Kirwan]

On Thu, 25 Nov 2004 02:20:48 -0800, Jack Crane <jdcrane7@yahoo.com> wrote:

What does the Rnd key (SHIFT 0) (in the lower-left corner) on the Casio fx-
115MS calculator do, and how is it used?
snip

It produces a "random" number.

Jon

 

[Steve Evans]

On Thu, 25 Nov 2004 02:20:48 -0800, Jack Crane <jdcrane7@yahoo.com>
wrote:

What does the Rnd key (SHIFT 0) (in the lower-left corner) on the Casio fx-
115MS calculator do, and how is it used?

It rounds off the internal value contained in the Y-register so it
equals the displayed value.
--

Fat, sugar, salt, beer: the four essentials for a healthy diet.

 

[Jack Crane]

Steve Evans <smevans@jif-lemon.co.mars> wrote in
news:f2fbq0hhscpcro1rvcvdacidvhtq5l0t4h@4ax.com:

On Thu, 25 Nov 2004 02:20:48 -0800, Jack Crane <jdcrane7@yahoo.com
wrote:

What does the Rnd key (SHIFT 0) (in the lower-left corner) on the
Casio fx- 115MS calculator do, and how is it used?

It rounds off the internal value contained in the Y-register so it
equals the displayed value.

Could you give me an example that includes the keys to push?

Thanks,

Jack

 

[Jack Crane]

Jonathan Kirwan <jkirwan@easystreet.com> wrote in
news:aqebq09snn4djs6ic02pvc4sk2628ua6uo@4ax.com:

On Thu, 25 Nov 2004 02:20:48 -0800, Jack Crane <jdcrane7@yahoo.com
wrote:

What does the Rnd key (SHIFT 0) (in the lower-left corner) on the
Casio fx- 115MS calculator do, and how is it used?
snip

It produces a "random" number.

Jon

From what range? The Rnd# key gives a random number in (0,1).

Jack

 

[Jonathan Kirwan]

On Thu, 25 Nov 2004 11:01:53 GMT, Jonathan Kirwan <jkirwan@easystreet.com>
wrote:

What does the Rnd key (SHIFT 0) (in the lower-left corner) on the Casio fx-
115MS calculator do, and how is it used?
snip

It produces a "random" number.

Woops! I got the key next to it! You said, Rnd! My mistake!

Jon

 

[Jonathan Kirwan]

On Thu, 25 Nov 2004 03:26:12 -0800, Jack Crane <jdcrane7@yahoo.com> wrote:

From what range? The Rnd# key gives a random number in (0,1).

Yup! I was looking down at the calculator and looked for shift-0 and instead
saw shift-. My mistake. Actually, I don't recall ever using Rnd, which is
probably why I so quickly assumed I picked out the right key. Sorry about that.

Jon

 

[Jack Crane]

Jonathan Kirwan <jkirwan@easystreet.com> wrote in
news:4fgbq0tnql9iibqbubqnbpkc2ape3p9uqa@4ax.com:

On Thu, 25 Nov 2004 03:26:12 -0800, Jack Crane <jdcrane7@yahoo.com
wrote:

From what range? The Rnd# key gives a random number in (0,1).

Yup! I was looking down at the calculator and looked for shift-0 and
instead saw shift-. My mistake. Actually, I don't recall ever using
Rnd, which is probably why I so quickly assumed I picked out the right
key. Sorry about that.

Jon

Apology accepted.

Jack

 

[Steve Evans]

On Thu, 25 Nov 2004 03:24:09 -0800, Jack Crane <jdcrane7@yahoo.com>
wrote:

Steve Evans <smevans@jif-lemon.co.mars> wrote in
news:f2fbq0hhscpcro1rvcvdacidvhtq5l0t4h@4ax.com:

On Thu, 25 Nov 2004 02:20:48 -0800, Jack Crane <jdcrane7@yahoo.com
wrote:

What does the Rnd key (SHIFT 0) (in the lower-left corner) on the
Casio fx- 115MS calculator do, and how is it used?

It rounds off the internal value contained in the Y-register so it
equals the displayed value.

Could you give me an example that includes the keys to push?

I guessso, but its rather late now where I am. I'll do it ifircall
tomorrow.
--

Fat, sugar, salt, beer: the four essentials for a healthy diet.

 

[Jack Crane]

Steve Evans <smevans@jif-lemon.co.mars> wrote in
news7rcq0ldjuak6jr6odolkhouk4ddhdkit2@4ax.com:

On Thu, 25 Nov 2004 03:24:09 -0800, Jack Crane <jdcrane7@yahoo.com
wrote:

Steve Evans <smevans@jif-lemon.co.mars> wrote in
news:f2fbq0hhscpcro1rvcvdacidvhtq5l0t4h@4ax.com:

On Thu, 25 Nov 2004 02:20:48 -0800, Jack Crane <jdcrane7@yahoo.com
wrote:

What does the Rnd key (SHIFT 0) (in the lower-left corner) on the
Casio fx- 115MS calculator do, and how is it used?

It rounds off the internal value contained in the Y-register so it
equals the displayed value.

Could you give me an example that includes the keys to push?

I guessso, but its rather late now where I am. I'll do it ifircall
tomorrow.

Great!

Jack

 

[Steve Evans]

On Fri, 26 Nov 2004 16:29:27 -0800, Jack Crane <jdcrane7@yahoo.com>
wrote:

My fx-115MS has no <x-y>.

Really? Mine is obtained by pressing <shift><X^2> But I use the
fx-3400P which may differ in some respects. I assumed mine was just
hte programmable version of yours, but the differences might go wider,
I dunno.

So why don't you just tell me what RND does?

Robert and me have already told you that.

Is that a joke? If not, what do you mean? If I knew what it does, I might
or might not find it useful. If it is useful to me, then I need it.

Fair enough.
--

Fat, sugar, salt, beer: the four essentials for a healthy diet.

 

[Chaos Master]

Jack Crane is, and always will be:

So why don't you just tell me what RND does?

I think it stands for 'round number'.

I have not had a Casio calculator for a long time, but AIUI and IIRC it
works like:

3.5683927835
3

RND

3.568

(rounding 3.5683927835 to 3 decimal)

--
Chaos MasterŽ, posting from somewhere near Porto Alegre, Brazil.
"... one either has a shit, or not. Do you have yours?"
ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
http://marreka.blogspot.com --> news, hotter than high-power transistors!

To reply remove "DEADTOTHESPAMMER" from address.

NP in foobar2000: 15. Evanescence - [Fallen #05] Haunted [3:07]

 

[Jack Crane]

Robert Monsen <rcsurname@comcast.net> wrote in news:G94qd.161976$R05.64212
@attbi_s53:

Now, try to figure out 'solve'.

OK, Robert, you got me. Twice I've entered thru SHIFT SOLVE and the first
prompt is "B?"; and I'm not given a chance to enter A. Does this really
work?

Tried a simpler equation, A-squared = B X C-squared, with A=8, C=2. Same
thing happened.

Jack

 

[Jack Crane]

Robert Monsen <rcsurname@comcast.net> wrote in news:4vSqd.168278$HA.118072
@attbi_s01:

Make sure you are in 'comp' mode, not 'cmplx' mode. The solve function
does not work in complex mode. Enter 'mode clr' and then '1' to enter
'comp' mode.

Yes, I've been in comp mode.

Jack

 

[Robert Monsen]

Jack Crane wrote:

Robert Monsen <rcsurname@comcast.net> wrote in news:4vSqd.168278$HA.118072
@attbi_s01:


Make sure you are in 'comp' mode, not 'cmplx' mode. The solve function
does not work in complex mode. Enter 'mode clr' and then '1' to enter
'comp' mode.



Yes, I've been in comp mode.

Jack

After entering your formula for 3=A*B, can you switch between "A=" and
"B=" on the top display line using up and down arrow?

--
Regards,
Robert Monsen

"Your Highness, I have no need of this hypothesis."
- Pierre Laplace (1749-1827), to Napoleon,
on why his works on celestial mechanics make no mention of God.

 

[Jack Crane]

Robert Monsen <rcsurname@comcast.net> wrote in news:3GWqd.169549$HA.22176
@attbi_s01:

After entering your formula for 3=A*B, can you switch between "A=" and
"B=" on the top display line using up and down arrow?

No. After "A=" appears, up-arrow produces "3", and I'm stuck there.
Down-arrow doesn't work after "A=" appears.

Jack

 

[Jack Crane]

Robert Monsen <rcsurname@comcast.net> wrote in
news:UDwqd.411559$wV.308600@attbi_s54:

Solve uses an iterative solver to try to figure out a numerical
solution. Say you want to figure out the right resistor value to make
divider, but you were too lazy to do the algebra in your head. If your
input voltage was 10 volts, and you wanted 1.7 volts out, you could
type

1.7 alpha = 10 * alpha A / ( alpha A + alpha B) shift solve

You then get a prompt for A, as in "A? ". Say you want to solve for A.
Then, hit the down key (the bottom of the circular key). You get a
"B?" prompt. Enter a value for B. (say you have a 10k resistor)

10000 =

then get back to the A? prompt by typing up arrow (the top of the
circular key) and type

shift solve

it'll crank for a bit, then display A= on the first line, and
2.048...k on the second line.

Did this twice and both times with A= on the first line, the second line
was 0.

Thus, for a value of B=10k, a value of A=2.05k will

get you 1.7V.

The trick is to use the up and down key to enter values for variables
you have values for, and then use shift solve on the one you want the
value for.

Tried a really simple equation, 3 = A*B (3 Alpha = Alpha A * Alpha B),
with B=3. Again, with A= showing on first line, second line showed 0.

Jack

 

[Steve Evans]

On Thu, 25 Nov 2004 23:46:53 GMT, Steve Evans
<smevans@jif-lemon.co.mars> wrote:

On Thu, 25 Nov 2004 03:24:09 -0800, Jack Crane <jdcrane7@yahoo.com
wrote:

Steve Evans <smevans@jif-lemon.co.mars> wrote in
news:f2fbq0hhscpcro1rvcvdacidvhtq5l0t4h@4ax.com:

On Thu, 25 Nov 2004 02:20:48 -0800, Jack Crane <jdcrane7@yahoo.com
wrote:

What does the Rnd key (SHIFT 0) (in the lower-left corner) on the
Casio fx- 115MS calculator do, and how is it used?

It rounds off the internal value contained in the Y-register so it
equals the displayed value.

Could you give me an example that includes the keys to push?

I guessso, but its rather late now where I am. I'll do it ifircall
tomorrow

Well here I amagain. Your calculator has three main registers for
holding current values, X, Y, and K registers. they each have three
particular jobs to do. X is the working reg., holding the displayed
value, Y's like a variable reserve reg. for any ohter 'reserve' value
and K holds fixed, programmable values. If you divide 50 by 10 then
press <shift><x-y> you'll get the result 0.2 ratger tgan 5. Fool
around with these registers and the RND function and yo';ll see what
goes down. BTW, if you don't know what it does, why do you need to use
it?
Have fun.



--

Fat, sugar, salt, beer: the four essentials for a healthy diet.

 

[Robert Monsen]

Steve Evans wrote:

On Thu, 25 Nov 2004 23:46:53 GMT, Steve Evans
smevans@jif-lemon.co.mars> wrote:


On Thu, 25 Nov 2004 03:24:09 -0800, Jack Crane <jdcrane7@yahoo.com
wrote:


Steve Evans <smevans@jif-lemon.co.mars> wrote in
news:f2fbq0hhscpcro1rvcvdacidvhtq5l0t4h@4ax.com:


On Thu, 25 Nov 2004 02:20:48 -0800, Jack Crane <jdcrane7@yahoo.com
wrote:


What does the Rnd key (SHIFT 0) (in the lower-left corner) on the
Casio fx- 115MS calculator do, and how is it used?

It rounds off the internal value contained in the Y-register so it
equals the displayed value.

Could you give me an example that includes the keys to push?

I guessso, but its rather late now where I am. I'll do it ifircall
tomorrow


Well here I amagain. Your calculator has three main registers for
holding current values, X, Y, and K registers. they each have three
particular jobs to do. X is the working reg., holding the displayed
value, Y's like a variable reserve reg. for any ohter 'reserve' value
and K holds fixed, programmable values. If you divide 50 by 10 then
press <shift><x-y> you'll get the result 0.2 ratger tgan 5. Fool
around with these registers and the RND function and yo';ll see what
goes down. BTW, if you don't know what it does, why do you need to use
it?
Have fun.

Try this sequence:

PI = sin ans

you get zero.

Now, try

PI rnd = sin ans

you get 3.59n (or 3.59e-9)

The rnd rounded PI to the digits on the display, so the answer wasn't
exact wrt the internal registers.

I can't think of a good use for this key. You almost never care about
more than a few significant digits anyway.

--
Regards,
Robert Monsen

"Your Highness, I have no need of this hypothesis."
- Pierre Laplace (1749-1827), to Napoleon,
on why his works on celestial mechanics make no mention of God.

 

[Jack Crane]

Steve Evans <smevans@jif-lemon.co.mars> wrote in
news:ss4eq0l559fmesqobi716aqifc0e8qct2t@4ax.com:

On Thu, 25 Nov 2004 23:46:53 GMT, Steve Evans
smevans@jif-lemon.co.mars> wrote:

On Thu, 25 Nov 2004 03:24:09 -0800, Jack Crane <jdcrane7@yahoo.com
wrote:

Steve Evans <smevans@jif-lemon.co.mars> wrote in
news:f2fbq0hhscpcro1rvcvdacidvhtq5l0t4h@4ax.com:

On Thu, 25 Nov 2004 02:20:48 -0800, Jack Crane <jdcrane7@yahoo.com
wrote:

What does the Rnd key (SHIFT 0) (in the lower-left corner) on the
Casio fx- 115MS calculator do, and how is it used?

It rounds off the internal value contained in the Y-register so it
equals the displayed value.

Could you give me an example that includes the keys to push?

I guessso, but its rather late now where I am. I'll do it ifircall
tomorrow

Well here I amagain. Your calculator has three main registers for
holding current values, X, Y, and K registers. they each have three
particular jobs to do. X is the working reg., holding the displayed
value, Y's like a variable reserve reg. for any ohter 'reserve' value
and K holds fixed, programmable values. If you divide 50 by 10 then
press <shift><x-y> you'll get the result 0.2 ratger tgan 5.

My fx-115MS has no <x-y>.

Fool
around with these registers and the RND function and yo';ll see what
goes down.

So why don't you just tell me what RND does?

BTW, if you don't know what it does, why do you need to use

it?

Is that a joke? If not, what do you mean? If I knew what it does, I might
or might not find it useful. If it is useful to me, then I need it.

Jack