07_eng.mw

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Hi, this may be a stupid question, but I have trouble getting it right...

I want to create a matrix from a function that uses some of the arguments of the fuction as indices, but want to carry on the other arguments, here is an example of what I have:

MyFunction:=(a,b,c,k,l)->a+b+c+k+l;

MyMatrix:=Matrix(3,3,(k,l)->MyFunction(a,b,c,k,l)); # this is working but not what I want

MyMatrix now contains a,b,c as variables but not as function parameters ...

pliss , ,  tell me how to find ortonormal basis with Gram-Schmidt ???

Is it possible in Maple to choose the dimensions for a plot? I mean to choose the height and the width of the plot?
For example, to enlarge the plot to the whole width of the maple page? Is it possible?
I need to do this because I have to plot together objects of different dimensions and so the smaller ones look too small, so I would like to enlarge the plot to solve the problem. 

Sorry for may be stupid question, but please see the following example:

a := proc() A end:
a();
                               A
a[b]();
                  ...

if i restrict value in matrix to 0,1  or 0,1,2 of dimension 2*2 or 3*3

how to show all combination of matrix ?

I use rk4 to solve this equation with the paramater w = 500, I want to get the numbers of steps.

And when I change the parameter w = 1000, I want to obtain the numbers ofsteps?

Here is the procedure:

restart:
Digits:= 32;
w :=  500;
ode := diff(y(t), `$`(t, 1)) = 2*I*y(t) + sin(w*t)*y(t)*y(t):
ics := y(0) = 1:

p2 := dsolve({ics, ode}, numeric, method = classical[rk4]):

Thanks for your help.

is there any way to solve this integration?

int((1/200*(x-r))*r*(1+(a+(1/400)*(1+a^2)^(3/2)*r^2)^2)^(3/2),r=0..x)

how to implement the unwrap function from Matlab?

Description

Q = unwrap(P) corrects the radian phase angles in a vector P by adding multiples of when absolute jumps between consecutive elements of P are greater than or equal to the default jump tolerance of radians. If P is a matrix, unwrap operates columnwise. If P is a multidimensional array, unwrap operates on the first nonsingleton dimension.
Gracias

One thing I think is a bit strange is the notion that the loop counter
is assigned a value after the loop is done. Why is that ?

for example:

for i to 10 do
print(i)
end do;

The above code will simply print 1..10 but then if you simply run:

i;

then 11 will be printed out. How often do you actually need i to be assigned
a value after the loop is done?

I think it would have been much better if i is unassigned when the loop is done

what are the command of characteristic set and basic set of polynomial in maple?

google can not find, do the commands exists?

I have two system of differential equations, the first one is implicit differential equations and the second one is BVP problem.

Maple can't give answers for both of them.

Can you help me ,Numerical approach is very appreciated.

thank you in advance.

unsolved_problems.mw

what is the command get the number of rows and columns of a matrix?

What maplesoft product is best for Mathematics in Computing? The textbook being used is Discrete Mathematics and Its Applications (6th Edition)