Hi, I am new to Maple and am having trouble with what should be a simple task. I have a series of simultaneoous equations of the form a*x+b*y=c etc. I have found an initial equilibrium by choosing values of x and y which give me reasonable values of a and b (using the Solve command I have output of a,b,c,x,y which satisfy my equations). Now, I need to use the parameters I have, my a,b,c, to try and retrieve my x and y (my real aim in this is to see the effect on the x,y when I change the a,b,c). When I try and put the equations plus parameter values into Solve it takes a very long time to solve (I stop after 20mins). What I want to do is use the equilibrium values I obtained before to give Maple a starting point to search for a solution.

Hi Folks, Here is a numerical integration program: http://people.scs.fsu.edu/~burkardt/f_src/quadpack/quadpack.f90 In evaluating the integrand functions, it is good to do two function evaluations at the same time simultaneously. I just found that I have two CPUs Pentium Xeon 2.4GHz, each supporing only up to SSE2. Although the CPUs are slow, but if I can utilize them to do parallel computing of the numerical integration. It would be great! But I am not a Fortran expert, nor am I a CS major... Could anybody give some easy-to-follow advice on how to make that code parallel on two CPUs?

Documentation on how to reference or assign values to elements in Table is limited. I uploaded a copy of a simple code (690_MTable) which tries to assign values to the elements the table. Code does not give and error message but does not do what I wanted to do. Please replace this text with the link to your file. The link can be found in the View 690_MTable.mw on MapleNet or Download 690_MTable.mw

I can plot this fine in Mathcad so I know it should work. But in Maple I am only getting a single point at 0 and another at 10. plot( (-1)^x, x=0..10,y=-3..3, color=blue, style=point); Thanks for any help, glenn

I want to write the function into the proc. test:=proc(h) h(1.1); end; proc(h) ... end; It doesn't gives what I want: test(x^3); 3 x(1.1) I would like to obtain 1.331 . More explicitly, how can I write into a proc a function directly, say x^3? (Not defining earlier h:=x->x^3 .)

I want to define the operator L(g):=(phi*D)(g), which to be understood L(g)(x):=phi(x)*g'(x), phi is a fixed smooth function. One solution would be to write a procedure, but I would like a more elegant method. How can I do it?

Hi all, I am having lots of trouble using C codegen in generating C code from Maple expressions. My questions are: 1. How to assume each element of a whole array or vector >0? Of course I can do: Assume (a[1]>0, a[2]>0, a[3]>0)... But I have "m" elements, how can I do that for all m elements? 2. What to do if the output says "the output length exceeds maximum limit of 1000000"? This occurred when I tried to "simplify" some complicated expression... obviously Maple did get some results, but it refused to print them out due to length limit, ... 3. There is no way to translate the result of "JJ16:=optimize(JJ15, 'tryhard')"?

I have a function of array x[n]: f.e. f:= x[1] + x[1]*x[2] + x[1]*x[2]*x[3]. How to compute a derivative with respect to x[1],x[2],x[3] ? diff(f,x[1]) returns 0. Another question: I need to evaluate n- multidimensional integral: int... ( int( int(f,x[1]=0..1) , x[2]=0..1, ..... , x[n]=0..1 ). How shall I write ?

Here are more 3D Strange Attractors, the formula I used is a PickOver which is described in my last post, every plot has 10000 iterations(it could be more), you will find that some plots has shape of a Galaxy which I found very interesting because it is a relatively simple formula!! What more things could be so simple!!?? Gravitation:

Gravitation(different angle): Tornadoe: Tornadoe(different angle and coloring): Galaxies: Galaxies(different angle): Constelation: Thats all for now... If you have a question, suggestion, or an idea for an algorithm, write to me. Scasbyte. (scasbyte@hotmail.com)

Maple 11 has included indicial notation capability to its new Physics package. This is a good start in performing tensorial calculations using Einsteinian summation convention. However, I wish that Maple further adds the following capabilities to make this package of practical use to folks involved in tensor analysis. This wish list is based upon my personal experience in using tensor analysis for continuum-mechanics and is in no way representative of the community involved in other fields like the theory of relativity. 1) Both covariant and contravariant indices are denoted in subscript. Including the convention of posting counter and covariant indices in super and subscripts, respectively, will help to improve the readability of the printed results.

I have a rather complex statistical problem and was wondering if Maple would be able help. For my Oxford University thesis I have conducted a survey which seeks to estimate respondents' values for a certain preference parameter (relative risk aversion, RRA). This parameter is continous, but my data is categorical, i.e. the parameter value of each respondent is only estimated as a range. There are eight such categories. What makes it more complex still, is that the data is censored. The lowest category has no lower limit, and the highest category has no upper limit. The actual categories are as follows:

Hi! I'm ScasByte welcome to my MaplePrime blog.

If you are interested in 3d Strange Attractors but you don't know how to create it here I can show you how, create Strange Attractor is actually very easy, if you are new to Maple then you might this very useful.
Here is a link to the first 3d Strange Attractor(the most simple of all) a PickOver.

Here is the code to generate a PickOver:

Earlier today, I was re-reading an old post when I was inspired. The post asked how one could use typesetting rules to make the call of a procedure typeset as a binary operation. The example used in the post was something along the lines of: myproc(a,b); becomes a <symbol> b; Inspired by a response to that post, I started looking at the help page for the define command and doing some testing in Maple. I was ready to make a reply to that post, when I stumbled upon a mind-boggling error. In the time it's taken me to track down that error (and run various errands), the original post has vanished from my view. Perhaps it still exists somewhere, but for the life of me, I cannot find it; therefore, I post to the next most appropriate place to describe and discuss this shortcoming: This blog.

Has anyone tried to export a 3D plot from Maple 10 to TurboCad 10.5 or 11.2? When I try this, the dxf file is produced, but when I open it in TurboCad, only a blank drawing is produced. Am I missing something? Don Ritchie

I'm faced with the problem of trying to plot a graph of the form, for values of b against a. a^2:= (b^2*c^2) + (a*d^2)/(a-e^2); Unfortunately, when I try and enter the above, Maple gives an error and tells me when that the equation is recurrsive. If I re-arrange the equation and then try and get an equation with a purely on one side, using the isolate command, Maple cannot isolate a. The re-arranged equation is of the from a^2 - a*e + (b^2*c^2*e)/a - d^2 - b^2*c^2 = 0; Perhaps I have re-arranged the equation incorrectly.