Being new to Maple I can't figure out how to do a 3d plot of a function w/ 3 variables. I want to be able to also do a space curve to show the constraints.
Anyway, here's the function.
f := proc (x1, x2) options operator, arrow; (339+(-1)*0.1e-1*x1+(-1)*0.3e-2*x2)*x1+(399+(-1)*0.4e-2*x1+(-1)*0.1e-1*x2)*x2-400000-195*x1-225*x2 end proc
I am not able to show it.
Thanks,
Bill

Hello, I have a problem with using JSP on MapleNet platform.

Suppose I have a HTML document with forms (the form calls itself for evaluation) and in that document an input text filed:

<input type="text" name="eq1">

At the beginning of the page I can assign a value in the text field to a maple variable:

<maple:assign param="eq1" variable="eqn1" default="sin(x)" />

but imagine that user fills the textfield with the text:

sum(n,n=1..4)

If I use something like this:

<maple:statement>print(eq1)</maple:statement>

There will be 10 on the output. How can I get an unevaluated input ( sum(n,n=1..4))?

solve(y(x)+3, x)
solve(y(x)+3, y)
solve(int((x+3)*y(t), t = 0 .. 2) = x^2+1, y)

Hi All,
I'm wondering if anyone can advise me on ways to perform 3D trapezoidal interpolation in Maple. Using 40 experimental data points View 2213_090606_PleaseHelp.mw on MapleNET or Download 2213_090606_PleaseHelp.mw, my goal is to generate a figure like the one on the right here:
That figure was generated manually by a colleague of mine (he drew in the triangles himself), but I'm wondering if Maple can do something like this. Thank you very much for your time!

Hi all
I'm sorry for the immense stupidity of this question, but I've been reading Maple's help files for about an hour and I can't find the answer to this simple question. Maybe someone can enlighten me!
What is the function that returns the length (by which I mean the number of elements) in a list?
Thanks in advance
Dave
8o)

When I plotted a graph the numbers on the axes were so cluttered that they're not readable. Can I set the scale so that the distance between the numbers is bigger?

Hey... i urgently need help from the experts out there.
Could someone tell what's wrong with these equation? Maple only returns solutions may have been lost!
Thank you.
solve({(-(a*c)*b^(-1)*d111+a^2*b^(-1)*d112-c^2*b^(-1)*d121+a*c*b^(-1)*d122-c^2*b^(-1)*d211+c*a*b^(-1)*d212-c^3*(b*a)^(-1)*d221+c^2*b^(-1)*d222)(b*d211+b*c*a^(-1)*d221-(b*d121+c*b*a^(-1)*d221)),(-(a*c)*b^(-1)*d111+a^2*b^(-1)*d112-c^2*b^(-1)*d121+a*c*b^(-1)*d122-c^2*b^(-1)*d211+c*a*b^(-1)*d212-c^3*(b*a)^(-1)*d221+c^2*b^(-1)*d222)((-c)*d211+a*d212-c^2*a^(-1)*d221+c*d222-((-c)*d121+a*d122-c^2*a^(-1)*d221+c*d222)),((-c)*d211+a*

Hi;
Is there any way to find
int(x*exp(-I*x*theta)/sinh(1/2*Pi*x),x=-infinity..infinity);
by maple, where theta is a real constant.
cheers
Sayed

Hello all,
Up-Front: it is a homework problem
I've been a longtime Mathcad user but have recently discovered the elegance and easy to use Maple.
The problem I am having is setting up the following equation:
velocity plus the distance equal to the square of time. With initial conditionsL y(0)= 6.
I am able to plot, set up for solving etc.. but this one is killing me.
I need to solve for the general solution.. hence this post.
Any hints tips etc.. will be appreciated.
TIA
Larry
aka malt_master@comcast.net

I want to plot a function, and set the x axis in powers of 10 like:
10, 10^2,10^3,10^4 etc...
But maple sets it to 1,2,3...
Can anyone help?

Dear Maple Primes!
I'm trying to evaluate the function F = (2^x/x!)^(1/x) for large x (upto 25,000 say). Maple seems happy to do this using the eval command. However, when I try to plot F it seems to have trouble, and the plot disappears at about x=170 only to reappear at about x=1000!
Is this problem related to the plot command, or to the evaluation of F?
Is maple's evaluation of F for large x reliable?
Thanks for the help
Ben

I am solving a set of equations with 4 variables. The solve comes out as an unordered set each time and I cannot figure out how to sort them. Btw, I am using Maple V Release 4 (yes it is old. :-))

So here is the results of the solve

sols := {b1 = 84.92147612, b4 = 87.31363038, b2 = 101.6273403, b3 = 86.10094107}

What i need to get is either the solution ordered {b1,b2,b3,b4} or the indices of the variables in order. I have tried the following:

Isort:=proc(L) local a,i;

> a:=sort([$1..nops(L)],evalb((i,j)->L[i]<=L[j])); [seq(L[i],i=a)],a end:

as recommended from another post and i get the following error:

I am having some trouble figuring out exactly how to organize data points to be used with the Data Analysis Assistant in Worksheet Mode. I initially extracted the expression sequence of data points from the data structure generated by the plot command (an ordinary 2D plot of a function); I then put the expression sequence in a list and put that in a Vector, and was successfully able to look at the data with the Assistant. I'd like to use my own data points (i.e., from Physics labs, etc.), but I don't know what type of data structure to use. The Assistant tells me to put them in either a Vector or an Array, and I've tried both; I get an error indicating that the order (or dimension) of the Curves structure cannot be found (or something to that effect).

Hi,
Is there any method to find an integral over a line on the upper-plane of x, from –infinity+I*0 to +infinity+I*0 by the form
Int(exp(-I*(x-1/x)*theta) /sinh(x-1/x),x=–infinity+I*0.. +infinity+I*0)
Or more complicated
Int((x^2+x+1)/sinh(x-1/x)*exp(-I*(x-1/x)*theta),x=–infinity+I*0.. +infinity+I*0)
Where theta is a constant real number.
Cheers
Sayed

I know using partial_diff can do Grad of a rank 1 tensor (i.e. vector) and get a rank 2 tensor. How do I do the reverse? is there any simple way? Thanks