Hi!

If I do a*RandomMatrix(2,2), maple will multiply a inside the matrix. How can I have maple keep it outside for readability?

Thanks!

I have written a procedure that creates lists of numbers (for later plotting, but that is irrelevant here). These lists I have programmed as 1-d rtables (Vectors and Arrays). Since I do not know initially how many entries the procedure will generate I am using programmer indexing (with round braces) so the Arrays and Vectors get extended as needed, 1 entry at a time. Basically; I dynamically allocate storage in this way. Maybe not the most efficient way but should work for now.

Hello every one,

I am trying to solve a system of 5 odes numerically but I get an error

"unable to convert to an explicit first-order system".

Please have a look and guide me through the problem.

Thanks

wprob1.mw

Hi, I am creating a plot to demonstrate symmetry about the y=x axis, and I want to show that the line segment connecting two points is the perpedicular bisector of the line y=x. I have plotted y=x, the two points, and the line segment connecting those two points. How do I plot the perpendicular symbol (or right angle symbol) that is connected to the lines and shows that they are indeed perpendicular?

Let A(2 , -2 , 0) B( 4 , 2 , 5 ) & C( -1 , -3 , 0).Find  H(x,y,z) be the orthocentre of the triangle ABC.

Hello, everyone.

How to plot 

plot(-(2*(e-1))*exp(-3*x)/exp(-3)+(3*e-2)*exp(-3*x)*x/exp(-3)) 

this function is the answer of ODE: 

ode1c := diff(f(x), x, x)+6*(diff(f(x), x))+9*f(x)

ics := f(1) = exp(1), (D(f))(1) = -2

I got a warnning : "

Warning, unable to evaluate the function to numeric values in the region; see the plotting command's help page to ensure the calling sequence is correct

Hi there!

I want to  plot phase portraits of this fractional system in maple please help me.

                          (alpha_1)
                        ...

I want to make a triangle with its sides: 3, 4, 5. My code can not  run. Please help me. 

> restart:

ListTools[Categorize]:

N:=10:

L:=[]:

for x1 to N do

for y1 from x1 to N do

for z1 from y1 to N do

for x2 to N do

for y2 to N do

I created a triangle whose length of the medians are integral numbers. Please comment to me about my code.

> resrart:

ListTools[Categorize]:

N:=5:

L:=[]:

for x1 from -N to N do

for y1 from x1 to N do

for z1 from y1 to N do

for x2 from -N to N do

for y2 from -N to N do

1) Define 3 x 3 matrix M first by generating a random matrix using RandomMatrix(3,3generator=1...9) such that the row reduced form reveals one free variable and then letting M equal this matrix. If you set M equal to the Random Matrix command, it will generate a different matrix every time. You do not want to this happen 2) using the matrix A that you defined in problem 1, define a vector b such that the matrix equation Mx = b can be solved and find it's solution.

Define nonsquare matrices A and B and a vector c such that following operation can be perform and perform the operation: A) A + B B) ( A - B)c C) define another vector c such that BV can be computed and computed D) solve the system of equation Ax = 0

Hey Everybody,

I have only been using Maple for a few weeks but have been very much enjoying the functionality of the with(VectorCalculus) tools. That said, I have been having some trouble evaluating vectors at specific values.

> with(VectorCalculus);
> P[0] := PositionVector([t, ln(t)]);
> N[0] := PrincipalNormal(P[0], t);
> P := eval(P[0], t = 1);

Hi, I have a 9x1 'j' matrix, i am trying to arrange it into a 'b' matrix. For b[6..9,1], I would like it to have matrix 'j' in 6,5,4,3. May I know how do i do it please?

j:=RandomMatrix(9,1):
b[1..2,1]:=j[1..2,1]:
b[3..5,1]:=j[7..9,1]:
b[6..9,1]:=j[6..3,1]: <<<doesn't work

Thanks.