A few beginner questions for the 49G
Drunken Master
Second is there a program or built in feature that allows you to graph
linear inequalities like Y>2X-2. Lastly is there any program to do
linear programing so that the calc gives you the min and max of a
function given the constraints?
Thanxz in Advance
CID
Al Borowski
> First of all how do you graph vertical lines on the 49G like X=5?
That's a horiziontal line.
I have no idea how to graph vertical lines - why do you need to?
> Second is there a program or built in feature that allows you to graph
> linear inequalities like Y>2X-2.
not that I know of - check HPcalc.org.
> Lastly is there any program to do
> linear programing so that the calc gives you the min and max of a
> function given the constraints?
I have some simple programs at http://alpage.ath.cx/hptute/hpprog.htm.
One of them, CP (Critical Points) should fit the bill. You give it a
function in terms of X and it tells you the critical points, their
values, and type (eg a min or max).
It does not test the limits, but thats easy to do yourself.
>
>
> Thanxz in Advance
no probs,
Al
Yoann D?sir
> First of all how do you graph vertical lines on the 49G like X=5?
Not in the FUNCTION graphing process. You need in my opinion to draw
the graph using the TRUTH or PARAM option. But of course, it can be
drawn on a HP49.
> Second is there a program or built in feature that allows you to graph
> linear inequalities like Y>2X-2.
Yes : the TRUTH plotting type.
> Lastly is there any program to do
> linear programing so that the calc gives you the min and max of a
> function given the constraints?
Well, getting the min and the max of a function is easy : just draw
the fuction, then use the FCN menu icon and EXTR.
Bye,
Yoann.
Bhuvanesh
> Well, getting the min and the max of a function is easy : just draw
> the fuction, then use the FCN menu icon and EXTR.
Does this allow you to enter constraints?
--
Bhuvanesh
Geir Klemetsen
"Al Borowski" <a.bor...@student.removeme.qut.edu.au> skrev i melding
news:3f80d824$0$23605$5a62...@freenews.iinet.net.au...
> Drunken Master wrote:
> > First of all how do you graph vertical lines on the 49G like X=5?
>
> That's a horiziontal line.
>
> I have no idea how to graph vertical lines - why do you need to?
>
>
> > Second is there a program or built in feature that allows you to graph
> > linear inequalities like Y>2X-2.
>
> not that I know of - check HPcalc.org.
Just use the puilt-in plotting function of the calc. 1 if the expression is
true and 0 if not.
Bryan
usually just put it within ten pixels and it works fine.
--
Using M2, Opera's revolutionary e-mail client: http://www.opera.com/m2/
Speed
> Drunken Master wrote:
> > First of all how do you graph vertical lines on the 49G like X=5?
>
> That's a horiziontal line.
>
it by hand, and you'll see.
The HP won't graph it as a function because technically it isn't a
function. If you convert it to a polar graph, it'll plot it. A polar
plot of 'R1(X)=5/cos(X)' will give you a vertical line going through
where X=5 would normally be (were it not a polar graph).
There's a way to do it as a parametric plot, but I can't remember
off-hand how the 49 wants to see parametric equations. It's got
something to do with complex numbers, but I've never really had to use
it, so I don't know how.
--CS
Aaron Wallace
>Al Borowski <a.bor...@student.removeme.qut.edu.au> wrote in message news:<3f80d824$0$23605$5a62...@freenews.iinet.net.au>...
>
>
>>>First of all how do you graph vertical lines on the 49G like X=5?
>>>
>>>
>There's a way to do it as a parametric plot, but I can't remember
>off-hand how the 49 wants to see parametric equations. It's got
>something to do with complex numbers, but I've never really had to use
>it, so I don't know how.
>
You should be able to do a vertical line at x=5 in a parametric plot like:
x: '5'
y: '100*(t-1)
tmin: 0
tmax: 2
How you set up 'y' will be determined by what your t-range is. I dont
know what the default range is, but basically, to see a vertical line,
you have to choose a t-range and / or y expression such that it goes
from y_min to y_max.
Aaron
Drunken Master
takes FOREVER to shade in the graph. Can I speed up this process in
any way?
Thanxz,
CID
Drunken Master
Al Borowski
> Al Borowski <a.bor...@student.removeme.qut.edu.au> wrote in message news:<3f80d824$0$23605$5a62...@freenews.iinet.net.au>...
> > Drunken Master wrote:
> > > First of all how do you graph vertical lines on the 49G like X=5?
> >
> > That's a horiziontal line.
> >
> Actually, it's a vertical line; X=5 no matter what Y is. Try plotting
> it by hand, and you'll see.
>
oops, you're right. I read that as Y = 5 :-p
cheers,
Al
Sir Al
> First of all how do you graph vertical lines on the 49G like X=5?
Make a plot of 'Y = 1E499 * (X - U)' where U is the position of the X
coordinate where you want your vertical line, in this case 5.
This does not make for a 'true' vertical line, but it's pretty close if your
Y scale isn't too large. If you want it to a true vertical line, then do
the following:
Make a function plot of ' Y = INFINITY * (X - U)' where U is the position of
the X coordinate of where you want your vertical line.
I believe 1E499 and infinity can both be negative, it shouldn't make a
difference.
Cheers,
Albert
John H Meyers
> how do you graph vertical lines on the 49G like X=5?
After 'PPAR' PURGE:
Try a FUNCTION (default) type plot of '1E499*(X-5)'
FUNCTION '1E499*(X-5)' STEQ ERASE DRAX DRAW PICTURE
Or a PARAMETRIC type plot of '(5,X)'
PARAMETRIC '(5,X)' STEQ ERASE DRAX DRAW PICTURE
Or just draw a LINE:
(5,-3.1) (5,3.2) ERASE DRAX LINE PICTURE
Or, borrow a barometer, tie it to the end of a string,
go to the top of a building, hold the string 5 units away
from the side of the building as you lower the barometer, etc.
http://cns.physics.gatech.edu/~andreas/physicsfun/barometer.html
.
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John H Meyers
> is there a program or built in feature that allows you to graph
> linear inequalities like Y>2X-2.
Faster than a speeding TRUTH plot:
Using the SHADE plotting function:
(perhaps someone can find the equivalent LIBEVAL or FLASHEVAL)
http://groups.google.com/groups?selm=3B863B08.2039517%40miu.edu
Using Jim Donnelly's INPLOT program:
http://groups.google.com/groups?selm=3B8695A1.3173982D%40miu.edu
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