Hi,

Presently, I am trying to find a way to replace functional expressions by a variable

For example I have an expression as follows:

p:=f(x)^2 + g(x)^3

I would like to get this to look like

q:= f^2 + g^3

Does anybody have an idea of how to do this in Maple?

Thanks,

Willem

Hello, I have a problem in plotting the vector field of dx/dt=sinx/sint

It shows me an error:

Error, (in DEtools/dfieldplot) unable to evaluate function `sin(x)` in evalhf

Dunno how to fix it

Here is my code:

DE := [diff(x(t), t) = sin(x)(t)/sin(t)];with(DEtools):DC:=[sin(x)/sin(t),.1]:dfieldplot(DE, x(t), t = -2 .. 2, x = -1 .. 2, arrows = medium, title = 'Diff', color = DC);

Hello everybody,

I'm completely new to Maple (installed it today) and have a question about the use of multi variabele expressions. I wanted to use a function B depending from the variables a, b, c and d without describing the expression explicit.

For example: B:= (a, b, c, d); [without the -> a....]

Then I wanted to take the taylor expansion of the first order for [a=e, b=f, c=g, d=h...

i am implementing q-Laplace

http://perso.uclouvain.be/alphonse.magnus/gbang/qbook712.pdf

when there are quite many differentiation rules

how to do a function for a new kind differentiation like a maple do?

Hi

Is it possible to plot WKB solutions such as exp(-I*f(x)*x)/sqrt(f(x); where f(x) is any generic function of x e.g. sin^2x ? I have been trying in maple but can't get it to give me a plot.

I dont know what to do any further...

I have some function containing HeunG as a function

it is of the following form

f(k)=argument(functions containing HeunG) - ln(2)*k

now plotting this works...

But when differentiating with respect to k and then plotting it gives me the following message:

Warning, expecting only range variable k in expression (I*((1/2)^(1/2*I*k))^2*HeunG(3,-9/2+3/4*I*k-3/4*k^2,-1+1/2*I*k,-1/2+1/2*I*k,1/2,1+I*k,1/2...

People:

I wrote a Maple 15 worksheet containing a function that calls two other functions defined earlier in the worksheet. The main function didn't work, so I replaced one of the functions that was called, by cut-and-pasting its definition into the main function. This is obviously inconvenient because I want to alter the function that I cut-and -pasted and whenever I do it I will have to cut-and-paste again. It also detracts from the...

Hello,

I have created a test document to check an equation and I would like to feed a range of k values (ranging from 0 to say 512) in increments of 1) to the main function, and then plot the result as a graph of Zuncomp (y-axis) vs k(x-axis).

I can verify the values of the function by typing say Zuncomp(0) or Zuncomp(10) etc but how do you run this so that you do Zuncomp(k) to read all values of k and generate the output to plot?

Using Maple 13 (Windows 7...

In trying to solve:

a := diff(u(t), t$2)+(p^2-I+t^2)*u(t) = 0;

I get the following solutions,

sol1 := u(t) = _C1*WhittakerM(-1/4-(1/4*I)*p^2, 1/4, I*t^2)/sqrt(t)+_C2*WhittakerW(-1/4-(1/4*I)*p^2, 1/4, I*t^2)/sqrt(t)

It should be possible to expand these into parabolic cylinder functions and but im not sure how, i would appreciate any help.

thanks

Hi everyone,

I am trying to understand how can I create a function based on the differentiate of a matrix.

For instance: And I would like to create the matrix FF based on the derivative of F with respect to x and then be able to use FF and a function.

I tried to combine, unapply, map and diff but I can't reach what I'm looking for.

I want to create a tangent function.

I know that you can create tan(x) but how can you create the tangent function when the solutions are only:

x in [0.19740;0.91510[ union [3.3390;4.0567 ?

Another explanation:

How you can graphically show the valid values of x in this inequality?

0.2 ≤ tan x < 1.3Best regards

fattali

Hi guys. I need to do a Runge-Kutta method to solve two equations and I'm having trouble at using functions. My program is as shown below:

restart; A := Matrix();

dt := 0.1e-2;

diff(x(t), t) := v;

diff(v, t) := a(x(t), v);

xo := 0; vo := 0;

for i to 1000 do

xn := xo+v.dt;

vn := vo+a.dt;

dx1 := vn.dt; dv1 := a.dt;

dx2 := (vn+(1/2)*dv1)*dt; dv2 := a(x(t)+(1/2)*dx1, (1/2)*dv1)*dt;

dx3 := (vn+(1/2...

Let function so that

Good day, dear Friends!

I'm trying to find real positive roots of equation

with Maple 16.01.

One can easly verifies that this euqation has at least two positive real (integer) solutions: at x=5 and x=10,

but Maple function

I would like to do the following procedure from a basic concept, but I can't figure out what I'm doing wrong (sorry for that, I'm a beginner). I have tried to look up some more information about procedures on the Help menu with no success. Here you have what I'm planning to do:

Considering the following function (which approximates the cosine function):

aprcos:=(x,n)->add((-1)^i*(x^(2*i)/(2*i)!),i=0..n)

I would like...

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