I would like to set an axis to logarithmic scale, after having loaded the Units[Standard] package.

The command is:

plot3d( function(input), x=-1..1, y=1..1, axis[3]=[mode = log] )

Confoundingly, the error is:

Error, (in plot3d) expecting option mode to be of type identical(linear, log)
 but received Units:-Standard:-log

So the problem is that with(Units[Standard]) hijacks all occurences of log and replaces them with...

Hey there

I got a little problem.

I would like to have the positive numbers on the y-axis to point downworth, and of couse the negative going upworth. Is that even possible? 

Hope you can help.

Thanks

Consider the following two functions, one of which is defined using a differential operator:

DO:=(f,x1,x2)->(sqrt(2)*x1+x2)*D[2](f)(x1,x2)-x2:

a:=(x1,x2,o)->1:
b:=(x1,x2,o)->simplify(DO((x1,x2)->a(x1,x2,o),x1,x2)):

b(x1,x2,o);

The Maple output is (D[2](f))(x1, x2)*sqrt(2)*x1+(D[2](f))(x1, x2)*x2-x2*D[2].

Why does this output contain the variable f, which should be substituted by a?

hi all,

To create an observability grammian I have to integrate a matrix with some equations that are difficult to integrate due to multiple time dependent variables. The simplest expression in the matrix is:

z₁^2 * sin( z₅ * t)^2          (1)

where z1 and z5 are from a state space model with 5 states and are given by:

z₁dot = z_{2     ...}

This is somewhat related to the interactive stock quote importer. 

The TSX, DOW jones industrial average, FTSE 100, Heing Seng indexes are all a collection of stocks and their index reflects the movement of those stocks. 

The Dow Jones Industrial average is designated ^DJI in finance.yahoo.com but that symbol is not available in the download.finance.yahoo.com from the interactive stock quoted importer.  Is there perhaps a way I missed...

I am having trouble extracting one part of a return of a solve.

> relatie := CD^2 = (AB+BC*cos(beta)+AD*sin(alpha))^2+(BC*sin(beta)-AD*cos(alpha))^2;
> vergelijking := solve(relatie, beta);

the solve seems to return 4 expresions and the data type is exprseq. I only need the first expresion (till the first comma) I tried using temp:=vergelijking[1] but that still contains 2 parts separated by a comma.

Has anyone gotten Wigner Rotation to work in Maple. My implementation based on a formula derived in Edmonds, which is equivalent to whatever is on wikipedia, just isn't working. And I don't know where the problem lies. I know for sure that my z axis rotaition works. But I guess my Y-axis rotation is failing for some reason. I'm sure that it matches the formula. I do a Z-Y-Z rotation, so the resulting rotation matrix is real. 

Ideas? Thanks fo any help you can provide!

Why does it give a error? I don't get it and I'm frustrated! Thanks a lot!

> restart; Digits := 4;
Verplaatsing (s) achteras naar hoek alpha
                                  


> AG := 382.5; AB := 45; BC := 369; CE := 117; EF := 108; GE := 135; CD := 238; FG := 36; BG := 346.5; DF := 222.8;
> rc := Vector(2, {(1) = 0, (2) = 0});
                       Vector[column](%id = 213058548)
> rcb := Vector(2, {(1) = BC*cos(alpha(t...

Hello guys I'm writing to you becouse I have some problem with miktex and maple.

I exported Maple workshed to tex file, but when I compiled  pdf by Winshell or TexnicCenter I have big problem.

The pdf file looks that:

I dont know why. I did some things ( copy ETC files from Maple to my document folder) but it's dosent help. I red some website and they are writing that:

"The MikTeX installer will create 2 directories that you should know the locations of: texmf and localtexmf. By default, these directories are created as

c:\texmf

and

c:\localtexmf

You are given the option of creating the second one (localtexmf), and I highly recommend that you do, especially if you plan on creating PDF files from Maple. "

But I can't find texfm or localtexfm on my PC

What should I do?? Please help me !  I need this to my graduate project

Best regards ( Sorry for my english)

Hi Colleagues

I made a worksheet program in Maple 12 then i want to print it as a PDF file but i want to add header and page numbers. How can i do that??????

Hey there

Is it possible to to view A4 paper when you work in maple instead off the "endlessly big" sheet you work in as standard?

My problem is that when i work in maple, it look different when i print it too an A4 sheet.

Looking forward to hear from you :)

Rune Eriksen

Consider the following function defined as an integral with parameters:

f:=a->int(a*x,x=0..1);

If one tells Maple to integrate this function int(f(x),x=0..1); evaluates to 1/3 although the correct answer would  be 1/4. This is because for Maple f(x)=int(x^2,x=0..1). (Isn't this quite a serious bug?) If one would rename one of the variables, the evaluation would work. My problem is that I want to define a sequence of functions...

How do I allow an infinite amount of parameters (...rest parameters don't seem to exist in Maple) such as the ones in the piecewise procedure (except for the optional parameter)?

first, thank you for reminding me, acer.

2nd, I received a mail that someone posted a new comment, but now I can't find my post, where is it?

3rd, can someone tell me how to ask an old question if no one answers for that question?

thank you in advance.

my old question is here:

http://www.mapleprimes.com/questions/97718-How-To-Plot-A-Trignometric-Equation

I  Presented problems for the plot "DB magnitude spectrum."
The structure of vector data spec has the following configuration,Float (-infinity), inside.

N := 64;
T := 1;

f := .25;
A := 1;
phi := 0;
n := Vector(N, -> i-1, datatype = complex[8]);

x := cos~(2*Pi*n*f*T);

X := DiscreteTransforms[FourierTransform](x, normalization = none);...