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Hi Everyone,

I want to draw a 3D cylindrical object with follwoing constraint:

(1) For z=0 to 5, it should be a cylinder with radius 2 units

(2) For z = 10 to 20, it should be a cylinder with radius 8 units

(3) Connecting piece between z=5 to 10 is a type of cylinder such that its radius increses from 2 to 8 as z moves from 5 to 10.


I know how to draw (1) and (2) individually, but can't make a connecting object.

Can anyone help me drawing that object?

Thanks in advance.

How can I integrate the value of different k values in the plot function, instead of assigning values to k before giving the plot comman? Can't see anything about this in the help file.



Problem with plot...

Yesterday at 1:15 PM farzane 30

hi all

i have this code and want to plot(NphiB1,y). but it is not plotted.

help me plz


theta1 := -arctan((Q*(-P*Q+sqrt(Q^2*W^2+W^4-W^2*P^2))/(Q^2+W^2)+P)/W):
Stheta1 := -(Q*(-P*Q+sqrt(Q^2*W^2+W^4-W^2*P^2))/(Q^2+W^2)+P)/(W*sqrt(1+(Q*(-P*Q+sqrt(Q^2*W^2+W^4-W^2*P^2))/(Q^2+W^2)+P)^2/W^2)):
Ctheta1 := 1/sqrt(1+(Q*(-P*Q+sqrt(Q^2*W^2+W^4-W^2*P^2))/(Q^2+W^2)+P)^2/W^2):


i have an ODE like this:

I sove this ODE with plot order:

odeplot(sol, [x, (3*D1*a+4*D2)*P(x)/((1-q*S(x))*D2)], .5 .. (1/2)*Pi, tickmarks = [[seq((1/10)*i*Pi = (180*i*(1/10))*`°`, i = 1 .. 8)], default]);
my plot work very well. but i need to plot this ODE with five different parameter (q for for instance, q=0.1 & q=0.2 ....) all in one axis. something like this:

I have some problems about plotting in Maple.

Question1. I have tried to plot this function for different intervals, but there is no resulting graph.


What do you think why this happens?

Question2. plot(1+18*(sinh(9*x-9/2)-sinh(3*x-477/2))^2/(9*cosh(9*x-9/2)+cosh(3*x-477/2))^2,x=-1..1);

The graph of this function is a wierd one. Is there any problem?


In this code, plot() and Norm() fail when used over a piecewise() function:

Error, invalid input: VectorCalculus:-Norm expects its 1st argument, v, to be of type {Matrix, Vector}, but received piecewise(t < 0, Vector[row](2, {(1) = -1, (2) = 0}, attributes = [coords = cartesian]), Vector[row](2, {(1) = 1, (2) = 0}, attributes = [coords = cartesian]))

Note that the same Norm() and piecewise() work fine when used without the plot() function:


Code works fine when piecewise() is removed, leaving a plot() / Norm() combination, for example:

So only the simultaneous combination plot() / Norm() / piecewise() fails. 

Finally, the question is:

Is there a way to plot Norm() / piecewise() combinations without workarounds like intermediate PLOT structures?

Thank you


I have an ODE plot like this and I want its horizontal axes to be in degree instead of radian, but I don't know how


Hi all,

I hope the best for every of you...

I wonder how it can be possible to plot this function (HeunTPrime) in Maple18???

Thanks a lot


Hope somebody can help me! I installed Maple on my computer, but everything is very small , for example the bar in the top with all the small icons. It is the same thing when I make plots. The values on the axes are very small. How can I change this?

I have taken a photo of the problem, don't know if it helps.

i need to plot tow functions but the legend not in top, bottom, left or right 

Given the sequence defined by the recursive relation a[n+1] = r*a[n](1-a[n])
You need to use the procedure iterate.
Throughout this problem you should choose initial values in the interval 0<a0<1.
(a) Let r=3/2. Calculate a moderate number of terms in the sequence (between 10 and 20). Does the sequence appear to be converging? If so to what value? Does the limit depend upon your choice of initial value? Plot the terms you have calculated
(b) Let r=2.8. Calculate a moderate number of terms in the sequence (between 10 and 20). Does the sequence appear to be converging? If so to what value? Does the limit
depend upon your choice of initial value? Plot the terms you have calculated How does this sequence differ from that in part (a).
(c) Let r=3.2. Calculate a moderate number of terms in the sequence (between 10 and 20). Show that the sequence does not appear to converging. Plot the terms you have calculated and describe how the sequence behaves in this case.
(d) Consider intermediate values between 2.8 and 3.2 to determine more precisely where the transition in behaviour takes place. Provide a few plots (no more than 4) showing the values you have investigated.
(e) Consider the values of r in the range 3.43<r<3.46. Determine as accurately as you can the value of r for which the period of oscillation doubles.
(f) As r increase further period doubling occurs. Try to find the when the sequence appears to oscillate between 8 values.
(g) Let r =3.65 and calculate a considerable number of terms (at least a few hundred) and plot your values.
(h) For r=3.65 choose a0=0.3 and then a0=0.301. Find and plot some terms in the sequence for each initial value. Determine how long the terms in the two sequences remain close together and when they begin to depart significantly from each other.

are these quations in wave form for harmonic ocillator?

i can not plot them

plot(exp(I*2*t) - exp(-I*2*t), t=0..10);

plot(cos(t) - I*sin(t), t=0..10);


why same solution but their plot graph are different?

plot(cos(t) + sin(t), t=0..10);
complexplot(exp(I*t), t=0..10);


Hello all, first time posting here.  Anyways, I am trying to make a velocity vector plot from known u and v velocity components at known x and y locations i.e. at (0.1, 0.1), u=-0.5 m/s and v=0.43 m/s.  My calculations have been performed with a FORTRAN code, and the results output in matrix format.  What I am left with are 4 vectors: x location, y location, u velocity component, and v velocity component.  I know that MATLAB has a specific function, called "quiver," for creating a velocity vector plot from known data points (through the use of vectors containing those points).  I have trouble believing that there is not an equivalent function, however convoluted it may be, in Maple to create these plots.  I have tried to manipulate the fieldplot, vectorplot, and arrow functions to no avail.

Any ideas on how to create a velocity vector plot from known data points?  I am using Maple 18.

Here is a link to an example of what I am looking for:

Thanks, Brandon.

I have used data and the curve fitting procedure to find a curve and I now have to put error bars on the graph to complete my task? I know that there is an errorplot function but I cant seem to find a way to do it with the curvefitting thing?


I have attached the whole worksheet, I hope someone can help! Thanks


Even if there was some method of exporting the graph to another medium that would also be very helpful




The plot command outputs a graph of symbols where the line is made up of "H"s, vertical lines on the axes are "+"s, horizontal lines on the axes are "-"s, and intercepts are "*"s.


How do I fix this problem so that the graph displays a graph normally?

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