I have some expression given as a "RootOf": i.e.

sol := RootOf(p(_Z));

How do I grab a hold of the polynomial inside?  This should be in the RootOf help file ... am I missing it?

I have an array called plotter[1..20]; each element in the array is a set of coordinates for a point plot in 3d.

ie:

print(plotter[1]);

output: ARRAY([1..105],[(1)=(3,3,4), (2)=(2,3,4)....etc   ]

I am able to plot them individually, but the different array elements are dependent on each other and I want to see how they change over time.

Ideally I would like to use animate3d but I don't feel like the parameters support what I'm trying to do. Is there any other function which would work for this process?

Is it possible to define a symbol for pointplot and pointplot3d (beyond the ones listed in the options help pages)?

Specifically, can I define a character from an installed font as the plot symbol? 

who can tell me how to find distance of point p from line L by using maple

(user of Maple 12)

I'm creating a program to graph the vertices of polygons.

My general variables are xcoord[ ][ ], ycoord[ ][ ], and zcoord[ ][ ], where for example xcoord[i][j] would represent the jth x coordinate of the ith polygon.

I have all the data generated, and am wanting to plot a particular polygon of my choice, but the arrays are giving me a bit of trouble.

I'm pretty new to maple and I haven't been able to figure out the syntax for everything.

The bit of code I'm using is:

with(plots);

I am trying to write a program for calculating the number of ways to place k non-attacking rooks on an m x n board with restricted positions defined in B.  If i remove "option remember" the program works but it doesn't work very efficiently, and my goal is to extend this into three dimensions, so it needs to work fairly quickly in 2 dimensions.  The problem comes when I put in "option remember&q

To whom it may concern:

It appears that 'GraphTheory[Trail]' is missing from the Maple help function. Am I overlooking something? I am running Maple 12.01.

Cheers

Roberto

Dear all,

      I really really need a command for getting the inflection point of a expression. Thank you very much!:)

Best regards.

Dear all,

I use solve() to sove a equation group. when I typed the command and press Enter. there is no response even a error or fail. what is the reason?

BTW: the equation is complex.

Best regards!

What's the standard (or a cool non-standard)  way to compute the expected value of a matrix, e.g., a covariance matrix? Using this code:

restart; with(LinearAlgebra): e1 := Statistics:-RandomVariable(Normal(0, sigma)); L := [seq(e1*cos(pi*t), t = 1 .. 3)]; convert(L, Matrix); Transpose(convert(L, Matrix)); M := Multiply(%, %%); S := map(Statistics:-Mean, M)

how do I simplify S to the matrix of +/- one's and factor out sigma^2 outside the matrix? Thanks. 

 

Given four points in 2D, P1=(0,7), P2=(1,-12), P3=(7,0), P4=(10,-9), solve the following problems:

Dear all,

       I am a newer for Maple. When I want to type some command in maple, I find that the default font is not very good. I try to change it, but when I type next exe group, I find  that the default font is recovered~~ How to change it forever?

Best regards,

I am having trouble with the following sum not adding properly:

sum(sum(sum(1/k!/j!/m!,k=2-m-j..2-m-j),j=0..2-m),m=0..2);

By my hand calculations, this should be 4 (?), but maple says it is zero. If we remove a factorial (like below) we will get a non zero sum. What am I doing wrong,or is this a bug in maple?

sum(sum(sum(1/k!/j!,k=2-m-j..2-m-j),j=0..2-m),m=0..2);

thanks.

I'm having trouble figuring out how to find the 2-D scalar potential of a 3-D vector field projected onto a plane.  The vector field is computed on the plane, coordinates (X,Y), as a vector function with arguments (X,Y,u), with 'u' being a parameter.

After invoking the VectorCalculus package and specifying

    SetCoordinates(cartesian[X,Y]),

I use the solve command to solve a quadratic equation. I get two outputs and want to assign the second output to the variable x. How can I do this?

Quadratic equation is 3x^2 - 9x+11

Thanks in advance!!