Hi, Sorry but i ve repeated the same question a few days ago but because it was quite down the line i thought to give it another shot I would like to make a 3D plot of some density functions(F(X)) where each lets say cdf, corresponds to a time value.So far Ive tried using the transform((x, y) command.The example below where I show how I have worked out for 4 cdfs corresponding to 10,20,30 and 40 ms, hopefully it will make it clearer of what i mean.(I have a thousand of different distributions up to 10 secs). with(stats): > C001:=plot(statevalf[cdf,lognormal[0.3792,0.9556]], 0..4, colour=green):

And now for something completely different - something I don't know how to do in Maple! [ :-) ]. Given a system of linear inequalities, say like {a1>5, a2<100, a1 >< a2}, how do I find sample values (integers in this case) in the solution space? For example, I would be happy with {a1=6,a2=3}.

I'm currently outputting some animations, but I'm not using the animate command - I'm using the command display([seq(tmp_alpha_plot||kk,kk=1..nt)],insequence=true) having previously created tmp_alpha_plot||ii:=display([ plot([seq([r_arr[i],alpha1_arr[i,ii]],i=0..nr)]), plot([seq([r_arr [i],alpha2_arr[i,ii]],i=0..nr)], color=magenta)]): What would be useful for diagnostics purposes is to be able to print in the corner of the animation both the timestep/frame currently displayed (I know this is automatic when you use the animate command, and I'll change if I need to), and the actual numerical value of the variables alpha1_arr and alpha2_arr. It would also be useful if I could also show the numerical values of some other variables I'm working with, as they're defined at that time.

Hey I was wondering which of the many Root() commands I would use to obtain an Integer root from a large polynomial for example X^2 - 9 would return 3 I will be using it for very large polynomials with big coefficents so if there is a more efficent one then that would be helpfull. Cheers in advance

I want to calculate the normal derivative with Maple?What's the command?Waiting for your help!

Hi - I want to graph an ode and the following are my commands: > restart; > with(plots); > with(DEtools); > plot1 := DEplot((diff(y(t), t, t))+6*(diff(y(t), t)) = 80*exp(2*t), {y(t)}, t = -1 .. 1, y = -1 .. 1, [[y(0) = 4], [(D(y))(0) = 3]], linecolor = ([BLUE, GREEN, BLACK]), arrows = MEDIUM); The error I get is : Error, (in DEtools/DEplot/CheckInitial) Too few initial conditions: [y(0) = 4] Can anybody tell me what I'm doing wrong? Thanks.

Hello, I wonder if someone could explain why, in the attached file, when I collapse the execution groups connected with the 3 equations the label (2) disappears but not the labels (1) or (3). Is there a workaround for this? Thank you View 2292_Label (2) disappears.mw on MapleNet or Download 2292_Label (2) disappears.mw
View file

I have this problem with the sum of a recursive seq: > restart; > with(student): > with(plots): Warning, the name changecoords has been redefined > a:=5.5*10^(-3): > R:=10*10^(-3): > d:=n-> ((-1)^n)*(R-(a^2)/(R+(-1)^(n-1)*d(n-1))): > d(0):=R: > afs:=seq(d(n),n=0..100): > q:=n->(-1*a*q(n-1)/(R+(-1)^(n-1)*d(n-1))): > q(0):=a*4*3.14*8.85*10^(-12): > lad:=seq(q(n),n=0..100): > sum(q(n)/(sqrt(y^2+(z-d(n))^2))/(4*3.14*8.85*10^(-12)), n=1..100); Error, (in q) too many levels of recursion How can I avoid this, is the syntax wrong? An additional question, if I want to plot the seq's how do I do this? I'm a bit over my head here when it comes to maple knowlegde.

Hi - Its me again. Let me try to explain my question with the following: y := proc (t) options operator, arrow; a*exp(2*t)+b*t*exp(2*t)+c*t^2*exp(2*t) end proc solve({3*c = -9, 3*b+12*c = 8, 3*a+6*b+2*c = 4}, {a, b, c}) It would be really cool if there was some way I could take the output from solve (values for constant a, b and c) and automatically assign these values in expression y. I can manually take these and type out y all over again but I think there's got to be a way that Maple recognizes that, alright, here's a, b and c and I'll just assign their values to a, b and c in expression y.

Hi, how can I stop a procedure of maple a use the global variables create before stop the code? Thanks Marco

Hi.. I'm a quite new user of maple, so I've got a question: I'm trying to solve a ode numeric with maple. I've got a solution, a procedure where I a can get a value of y(x) for any x.. (and also plot the "function") Additionally I would like to have a procedure which can give me the slope of the graph - y'(x) for any x. Can anyone help me to solve this problem? My code so far is: lignsub:=diff(y(x), x, x) = 0.7904982116e-3*sqrt(1+(diff(y(x), x))^2)/(1+0.1012020000e-2*sqrt(1+(diff(y(x), x))^2)) `løsning` := dsolve({lignsub, y(0) = 0, (D(y))(0) = 0}, type = numeric, output = listprocedure)

Please use replies to this blog post for free-form wish list items for Maple 12. Anything you'd like to see, in any part of Maple, go for it.

Am I having an off day, or does the view option for plots (and 3d plots) not work when one has axes=NONE? For example, the plots plot( x^2, x=-1..1, view=[-2..2,-2..2], axes=NONE); plot( x^2, x=-1..1, view=[-2..2,-2..2], axes=BOXED); produce completely different plots, with the view parameter being ignored in the first version. Can this be fixed? It seems a bizarre question, but I was trying to create a bit of space around a 3d plot so that it can be rotated without falling off the edge, and I can't figure out how to do that if I don't want axes.

Hi - I'm trying to collect cos(8t) and sin(8t) in the following equation: (-64*a*cos(8*t)-64*b*sin(8*t))*exp(6*t)+65*(a*cos(8*t)+b*sin(8*t))*exp(6*t)+81*c*exp(2*t) but the following command just spits out the same exact thing: collect(lside, [cos(8*x), sin(8*x)]) Any suggestions would be appreciated. Thanks.

Hi, I have a ‘slight’ problem (you will probably recognize it Joe! :-) ). It concerns the values of Tau, omega in my worksheet (see below). If I set Tau=0.7, omega=0.7*m*Eta everything is rosy, and works fine. If I start tweaking these values (which I have to) things go a bit pair shaped. I either get an error message after the first call to dsolve (e.g. when tau=0.5, omega=0.7*m*Eta) : "Error, (in dsolve/numeric/checksing) ode system has a removable singularity at r=1. Initial data is restricted to {Phi(r) = .20650095602297*diff(Phi(r),r)+.82088920025557e-1*I*diff(Phi(r),r)}"