Hello,
Can anybody suggest a workaround for the error I am getting?

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Okay, I know Maple's not giving the wrong answer...I'm sure I'm just asking the wrong way. When I ask for the standard deviation (Statistics:StandardDeviation) of a list of individual data samples, I get the expected answer. However, when I provide a list of values and a list of frequencies, I don't get the answer I'm expecting. Hopefully the attached worksheet will make my problem obvious.

View 1058_std_dev_problem.mw on MapleNet or

Hi,
I'm trying to set my MathML viewer to update constantly, as a certain animation in a plot changes. I would either need some type of "time delay" device since the animation works by millisecond delays (which I am able to control), or some type of animating function that isn't for plots, but for procedures. Basically, I am looking for a way to use Set or SetOption over and over again, at specific intervals, without having to click a button or perform a certain action each time the option changes. Thanks for any help.

Hi everybody!
a few weeks ago I asked in this forum a question:
http://www.mapleprimes.com/forum/partial-differetial-equation-heat
First I have to say that is really nice how easliy it solves the problem.
Now, I really need to see values in the solution (I mean, by given x and t).
In addition, I want to create graphs of the temperture as a function of t (I mean to state x, and then to check the temperture as a function of t in this x). Only I know is to do graphs of the temp' as a function of x)
How can I do all of those things?
Thanks A LOT !!!
RedFox
(:

Is there any way to plot more than one pointset on the same graph using pointplot. On my worksheet the following worked
plotpoint(points,color=red);
plotpoint(points2,color = blue);
But not
plotpoint({points,points2},color = [red,blue]);
or
plotpoint([points,points2],color = [red,blue]);
Any suggestions?

ok me again,
I have this economic problem.
Dc( pc , pt ) = 2000+1000*pt-2*pc
Sc (pc) = 23*pc
how can I plot this, and If I don't know what the value of (pt), can I still plot this?
thank you so very much in advance.

how do I find the value of (p) that will make an equation equal to an other.
ex: D(p):=82-0.75*p
and S(p):=1.3*p
how do I make maple find the answer. ( I know its way more easy by hand, but I would still like to know).
thank you ! Jp

I'm just trying to draw a Petersen graph with one vertex removed, using Maple 10:
```
with(networks):
P:=petersen():
Q:=duplicate(P);
delete(1,Q):
draw(Q);
```

I don't see anything wrong with these commands, and yet I get an error message:
"Error, (in draw/concentric) not a list of vertices [1,2,3,4,5]"
Yes, I know that - I've just deleted vertex 1. But surely I should still be able to draw the resulting graph? I know I can fiddle about with "Concentric", but I don't want to...
And another thing: the inplace implementation of "delete" is, I think, contrary to reason. I would rather have:

Does anyone know how to draw a triangle in 3 space with three points? Also, I need to plot 3 vectors on the same graph. Thanks

Dear All,
I'm working on a problem in differential equations where I need to compute the n-th power of a differential expression. Can Maple be taught to differentiate polynomial functions without carrying out the multiplications / simplifications that it usually does? For example:
diff(-2*c/x^3,x); gives the answer 6*c/x^4.
I want it to return: (-3)(-2)*c/x^4.
Ideally, I also do not want it to simplify sums of such results.
Thank you very much, I appreciate your help!
Andrea Bruder

Okay, well...we're using maple for our math lab in our school and we tried to work on our project.
We had this matrix:
A := RTABLE(419945880,MATRIX([[a, a, a, a], [0, 0, 0, b], [0, c, 0, 0], [d, 0, 0, 0]]),Matrix)
And when we tried to get the inverse, it would just lazily respond:
Inverse(RTABLE(419945880,MATRIX([[a, a, a, a], [0, 0, 0, b], [0, c, 0, 0], [d, 0, 0, 0]]),Matrix))
And it's been working like that for other matrixes, I don't know if I need to configure maple in a different way or something...?

I am working on a project in Maple 10 that was originally designed for Maple 9.5. I am trying to define the weighting function wt. The problem is that the instructions say to type the following command line:
wt := n -> if n=0 then 1
elif n=NInts then 1
else 2 end if;
However, when I do, the following error message shows up with the phrase "n -> if" highlighted in a red box.
"Error, invalid inline function
wt := n ->if n=0 then 1 elif n=NInts then 1 else 2 end if;"
Thank you for your help.
Adam

I wish to factor the following:
r^4 +10*r^2 +9*r = 0
I have entered it in Maple 10 as:
factor(r^4 +10*r^2 +9*r);
and I just get a repeat:
response: r^4 +10*r^2 +9*r
Am I doing something wrong or can not Maple factor this?
I'm fairly new to Maple.
Any help would be appreciated
Larry Ciak
aka malt_master@comcast.net

First Question: Let's say I have just created a plot using the Interactive Plot Builder. What If I just want to tweak the expression in the plot. Is there any way I can get the Interactive Plot Builder to open with all of the info related to a specific plot already inside the plot builder, so that I could just tweak the expression and everything else would remain the same? In other words, is there any way around having to start from scratch with the Interactive Plot Builder? A related question is this: Assume there is a plot, created with the IPB, in your worksheet. Is there any way to click on this plot and find out what Maple commands would have created the plot if the user had done it that way instead of using the IPB?

i am trying to get maple to expand this expression into one entire fraction:
a(1/2*e+1/2*f)^3+b(1/2*e+1/2*f)^2+c(1/2*e+1/2*f)+d
and then after i need to substitute the sum of certain terms into the new expression...ie ae^3+be^2+ce+d = 0
also, is it possible to have the above expression entered in as an ordered pair, and then expanded and expressed in an ordered pair: ie expand this:
((e+f)/2,a(1/2*e+1/2*f)^3+b(1/2*e+1/2*f)^2+c(1/2*e+1/2*f)+d)