The quantity ω(x):= limsup_T->+infinity Pi/T*ν(x,T) is said to be the frequency of a function x:[0,infinity)->R,
where ν(x,T) equals the number of zeros (taking into account  the multiplicities) of the function x on the interval [0,T].
a) To estimate from above the frequency of any non-zero solution of the ODE diff(x(t),t$2011)+x(t)=0.
b) To find the frequency of the function x(t):=sin(t)+sin(Pi*t).

Edit.

I have a variable number of pointplots c[1] .. c[i] and i want to plot all in a single plot.

I tried display(c[k],k=1..i); or display(c[k]$k=1..i); but i got an error. Typing evey list like: display(c1,c2,c3,....); is not possible because i is variable. What can i do?

I used the folowing command to solve a system of equations:

fsolve(equations,variables);

then the results were on the following form:

{u1=.1,u4=1,u5=3,u2=4,u3=0}

but I want to rearrange as:

{u1=.1,u2=4,u3=0,u4=1,u5=3}

please help me and i will very grateful for you... 

When i try to get all roots for an ODE, i try to use fsolve:

  fsolve((rhs(ODE_4))(t)=0,t=10..20);

where ODE_4 is an ODE (dsolve, numeric, output=listprocedure), where i want to find the root of the 4th variable in the ODE (4 should be an index).

Then i only get the fist root after t=10 and the computation stops. What can i do to get ALL roots in the given interval?

"Find the local maxima and minima in some noisy signal"

I have a data array which I want to determine the peaks in the measurements.
For this task I tried to translate the code found  from MatLab to Maple.
As you can see I get the values(peaks) on the x axis displaced.
By using GlobalSearch get the same peaks with the coordinates correctly.
As much as I seek and analyze command lines can not find the error or errors.

When I use the differential geometry package and setup a spherecial metric with greek letters using the palette it protects the variables displaying the actual greek symbol but it protects the basis elements (vectors and forms)  using the spelled versions i.e. dphi, dtheta.  In all subsequent calculations for other tensors like connection and curvature it displays the spelled names dphi dtheta whereas i would like to have the actual greek synbols displayed which it does in for example sin(φ...

Good morning.

 have a problem with maple that it can work and i need to know know how can i uninstall maple on ubuntu ( linux)

i can see that there isn't exist the folder uninstall.

help me please.

I want to plot the zeros of an ODE dependent on the change of a parameter of the ODE. My idea is to make a loop where i save the zeros to the given parameter into a file, so that i get multiple files with the zeros in it, and then make a plot with the parameter as x coordinate and the zeros as y coordinates. How can i make this possible in Maple? How can i set a variable filename, for example "parameter name = value".txt?

Hello again,

After i execute this code deltaT is no longer a Matrix, can anyone say me why?

(Supposing the first for loop only goes until 8 for instance deltaT remains a Matrix and the plot works so far...)

deltaT :=Matrix(1..19,1..6,fill=1)

 i := 0;
> j := 0;
> interfaceenergy := -1;
> sig := -200*10^6;
> for a from 1 by 1 to 19 do  interfaceenergy:=interfaceenergy+1; i:=i+1; j:=0;
> for b from 1 by 1 to 6 do sig:=sig+200*10^(6...

The Maple documentation claims that Alt-Shift-F6 allows you to cycle between open windows in Maple. Well, it doesn't. So, I'm wondering what shortcut (if any) allows you to do this. Also, why is the documentation misleading?

How do i plot a graph  of  (H .vs. X/(2.Pi.sqrt(2))) for different values of time =t

H is the film thickness

When I plot my values, I get a normal graph of H .vs. X, but I need to see the above mentioned graph.

Please suggest solutions.

The command which I wrote for my graph generation, looks like this:::::::::

> IBC := {h(x, 0) = 1+0.1e-2*sin(x/sqrt(2)), (D[1](h))(0, t) = 0, (D[1](h))(2*Pi*sqrt(2), t) = 0, (D[1](D[1](D[1...

Hi.

I have a procedure that takes multiple parameters, in which I want to fix all but one, and then define a single variable function that maps x to this remaining unspecified parameter, so I can give it to the plot() routine. I would like to define a number of such single variable functions for different values of the parameters and plot them all on the same axes.

Ideally, I would like to find a way to make the following, instead of returning 14, return 21,...

Can someone tell me why sprintf wont work in this situation?

out-of-balance_final.mw

Hi,

I am trying to simplify the expression s as given below. (I am not sure why it comes up with all the vector caclulus notation in it but it should display okay when you enter it)

Because of the presence of the exponential imaginary fucntions I thought evalc might be useful but when I use it I get a huge expression with csgn appearing in it. To my knowledge csgn appears when assumptions are not correctly specified - is this so? I can't see any assumption...

Hi,

I want to explore for example:

Explore(plot(Sum(i^2*sin(i*x), i = 1 .. n), x = 0 .. 10));

I know that animate can be applied as:

animate(plot, [Sum(i^2*sin(i*x), i = 1 .. n), x = 0 .. 10], n = 1 .. 10);

Is it possible to get the Exploration Assistant in the same worksheet after the command Explore and not in another worksheet ?

Explore can be done for many parameters which is not the case for animate.

Thanks for any suggestion