Any plans of correcting the obvious problem the MaplePrimes text editor has with the inequality sign < ?
It is really quite annoying.
Everything on a line of code after < is very often discarded with the obvious effect that the code doesn't run.

Hi 

I want  to make the phase plot of d(Z(t))/dt (along y) and Z(t) (along x axis). The initial conditiona are arbitrary. I only have one equation:

d(dz/dt)/dz = - (sqrt(d(z^2)/dt + 10^10 * z^2)*dz/dt + 10^(10)*z)/dz/dt

Is it still possible to make a phase space plot or do i need another equation?

Hi, I am looking for some help for a computation on Maple. I have the following objects

The sollowing sum S is a Fourier series of a non constant function. But the Maple result is a constant value of the function hypergeom. That can't be true.

S:=Sum((-1)^(1+k)*cos(2*Pi*k*x)/(-1+16*Pi^2*k^2), k = 1 .. infinity);

S=value(%);

Create an expression like g:=(3x^2 - 3y^2)/(x-y).

I would like the substitution x= 5, y=2 to produce the unsimplified, unevaluated expression (3*5^2-3*2^2)/(5-2).

I've tried various combinations of subs and subsop to no avail. Some piece of the expression is always evaluated.

Any suggestions?

Hello,

I am trying to add a random variable in ODE and solve it.

I chose A as the random variable.

Randomness in A will define like:

A with randomness for s in S=(-0.05,0.75) is:

A(t,s)= A`(t)+s

Where A`(t)= 0.25+ 0.0037t , if 0<= (t,365)<=182

                    0.5+ 0.0045 t  , if 182<= (t,365)<=365

I need to draw a box plot (BoxPlot(X,title="Box Plot", color=red) that shows the outliers, suspected outliers and fences. Can anyone direct me? Thanks.

The system of ODEs i am trying to analyse is just a 3d model of a ball in motion with gravity and air resistence acting upon it.

restart;

with(plots):

eq1 := diff(x(t), t, t) = -k*sqrt((diff(x(t), t))^2+(diff(y(t), t))^2+(diff(z(t), t))^2)^(n-1)*(diff(x(t), t))

eq2 := diff(y(t), t, t) = k*sqrt((diff(x(t), t))^2+(diff(y(t), t))^2+(diff(z(t), t))^2)^(n-1)*(diff(y(t), t))

eq3 := diff(z(t), t, t) = -g-k*sqrt((diff(x(t), t))^2+(diff(y(t), t...

i am doing a Q Laplace and finally summation it

however, i find an AccurateQSummation which is not like Summation

Should i use it, if not, use SumTools' summation how to simplify it?

restart;
with(QDifferenceEquations):
qexp := QPochhammer(-(-p*t), q, infinity);
f:= qexp*t;
b := subs(t=q^n,f);
QSimplify((1-q)*AccurateQSummation(b*q^n,n=-infinity..infinity));

with(SumTools):
QSimplify((1-q)*Summation(b*q^n,n=-infinity..infinity));

How I can get prd with only fifth and lower powers of x[n] in the following code?

p1:=a*x[n]+b*x[n]^3-c*x[n]^6:

p2:=d*x[n]^2-e*x^4+20:

prd:=collect(expand(p1*p2),x[n]);

Why won't evalf give me a number.  I have solved for a variable "iDS" higher up in my sheet, and want the approximate value of an element in a matrix.  this element is a function of iDS and no matter what I do, I get the function of iDS!

I really want to use Maple.  I see what it can do, but I often get "stuck" and very frustrated when I can't get it to do what I need it to do.  Sometimes when you are doing assignments, you need a number!

Been attempting this question for some time now and can't seem to get it right. 

Each time coming up with a different error.

It's part of our weekly homework, an extention question.

Write a procedure, marks, to take a student’s mark and output the appropriate grade, 

based on the following table:

mark       0-39.99          40-49.99           50-59.99          60-69.99            70+

Is it possible for someone to provide the roller coaster maplesim model?

For a math class, we have to create a roller coaster. Part of the coaster consists of two banked curves. I've tried looking it up but Maple isn't very clear on how to create the. So, how do you create banked curves in Maple?

> x[n]:=e[n]+w;
> f(w):=0;
> fxn:=convert(series(f(x[n]),e[n]=0,10),polynom);

How I can rewrite fxn so that every (1/k!)f^(k)(w)/f^(1)(w) for k=2,3,... is automatically replaced with c_{k}?

Here bracketed superscript denotes order of differentiation.