SlitRecoil.mw

At line 46 I do some integrals of a probablity function obainted from complex amplitudes. The plot of the function is shown above. However, the integral suddlenly drops to almost nothing when I increase the limits from +/- 0.195 to +/-0.2. The transition actually occus at ~0.196 (not shown)

This makes no sense. It doesn't seem  from the plot that the step size could get so large as to miss the peak! However, I don't know how to change numerical integral step size to test that.

---Arthur (a.k.a. Traruh)

Download how_do_I_algebraically_factor_an_expression_from_an_expression.mw

I have an expression and I want to select the part of the expression which has diff(y(x),x) in the expression.

Using select(has,expr,diff(y(x),x) works, except when the expression happend to be exactly diff(y(x),x) in this case select returns diff()

I understand why this happens. But I can not avoid this problem by say first checking if the expression has more than one operand, because nops(diff(y(x),x) is 2 and not one. Also 1+diff(y(x),x) has two operands. And I can not check if the expression is of type `+` or `*` before, because other types can have more than one operand also.

So now what I do is the folliwng: first check if the expression has diff(y(x),x). If so, convert the expression to D and now check if nops is more than one, and if so, only now call select.

This is becuase nops(D(y)(x)) is one, while nops(diff(y(x),x) is two.

Is there a better way to do this, in order to avoid calling select and getting diff() ? I suppose I could also just check if the expression is exactly diff(y(x),x) before even calling select or has and avoid all this?

Worksheet attached

Download best_way_to_check.mw

Hi

I have an equation which i want solve it with DTM and sketch the graph of f(η) along y axis and η along x axis, f ‘( η) and g( η)

M:=0..5

F[0]:=0;F[1]:=1;F[2]:=a/2;G(0)=0

That's my pleasure If there is somebody help me to code and solve this problem.

Thanks for every one very very much.

maple_calculations.mw

Why does my sequence return 0 at n=9 and n=10, when it should be 4?

Beneath the sequence i have also calculated the limit of f, as x approaches infinity, and it returns 4.

Below the initial screenshot, i have displayed a screenshot of the same plot but with a much bigger x-axis. It seems something weird happens at very large numbers of x. Is it a glitch, and if so how do i fix it?

here is the maple document containing the calculations below: maple_calculations.mw

Good day.

Several years ago, I obtained access to a clustering package that was useful to my studies using Maple 17.

In the meantime, I switched to another computer and now, I  cannot access the file, ClusterAnalysis.mla.

Unfortunately, I do not recall how I was able to access this library file.

Can anybody please advise me on the exact steps that are necessary to initialize and execute this file?

Thanks for reading ...

I'd like to plot row[i] of M_jk (left axis) vs. row[i] of M_ki (right axis). i is the x axis, and varies discretely from 1 to 10 (number of runs). See attached screenshot below for details. My result is off in terms of values... How to fix my plot command?

Please, how do I generate a list of ones in maple?

Dear friends,

I found a file in the Maplesoft Application Center to evaluate the minimum of a function in two variables.

I tried to extend the code to find a minimum for a function in 4 variables.

But the code does not work. Any Help, I will be appreciated.

Amr

Gradient_Search_Program_Code-22-9-2022.mw

How to linearize eq (6) by neglecting all higher order terms i.e., epsilon[1]^2, epsilon[2]^2, epsilon[1]*epsilon[2]... etc? How to do it in maple?

Calculation.mw

Please help me create a variation table of the function in maple like the above figure.

how_do_i_disable_prime_operation.mw

I haven't managed to round values with units, and get the trailing zeroes cut away, so I'd like to use the MapleTA:-Builtin:-numfmt function to do the job.

The problem is, that this function doesn't accept values with units.

I have managed to write a rounding function to do the rounding, but the problem here is that it will write the values with trailing zeroes, which isn't what I want.

Any ideas how to fix that?

How to find values of w for which determinant of A is zero?

determinant.mw

I have a proc that takes a function. This function is called  when the proc needs it to. Normally it will simply do a computation. The return is generally ignored(since the proc is a bit non-deterministic). I would like, though, to store values computed within the function in a global variable. I can't seem to use assign since it forces the variable to be local.

I can print the result of the function and it shows up but what is the proper way to assign variables within a function:

e.g.,

plot(store(x),x=1..2);

Then store would somehow store the values passed to the function(and in this case probably returning x). The example is not my use case and may not actually work properly.I cannot use global in the function passed as an argument to create a global variable.

F := proc(f)

    blah blah f(3)
    blah blah f(4)

end proc;

R := []:

F(x->store(R, x));

R = [3,4]